diff options
Diffstat (limited to 'drivers/watchdog')
86 files changed, 387 insertions, 515 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index ffe754539f5a..8188963a405b 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -18,7 +18,7 @@ menuconfig WATCHDOG reboot the machine) and a driver for hardware watchdog boards, which are more robust and can also keep track of the temperature inside your computer. For details, read - <file:Documentation/watchdog/watchdog-api.txt> in the kernel source. + <file:Documentation/watchdog/watchdog-api.rst> in the kernel source. The watchdog is usually used together with the watchdog daemon which is available from @@ -58,6 +58,15 @@ config WATCHDOG_HANDLE_BOOT_ENABLED the watchdog on its own. Thus if your userspace does not start fast enough your device will reboot. +config WATCHDOG_OPEN_TIMEOUT + int "Timeout value for opening watchdog device" + default 0 + help + The maximum time, in seconds, for which the watchdog framework takes + care of pinging a hardware watchdog. A value of 0 means infinite. The + value set here can be overridden by the commandline parameter + "watchdog.open_timeout". + config WATCHDOG_SYSFS bool "Read different watchdog information through sysfs" help @@ -717,6 +726,7 @@ config IMX2_WDT config IMX_SC_WDT tristate "IMX SC Watchdog" depends on HAVE_ARM_SMCCC + depends on IMX_SCU select WATCHDOG_CORE help This is the driver for the system controller watchdog @@ -1870,7 +1880,7 @@ config BOOKE_WDT Watchdog driver for PowerPC Book-E chips, such as the Freescale MPC85xx SOCs and the IBM PowerPC 440. - Please see Documentation/watchdog/watchdog-api.txt for + Please see Documentation/watchdog/watchdog-api.rst for more information. config BOOKE_WDT_DEFAULT_TIMEOUT @@ -2019,7 +2029,7 @@ config PCWATCHDOG This card simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. This driver is like the WDT501 driver but for different - hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC + hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.rst>. The PC watchdog cards can be ordered from <http://www.berkprod.com/>. To compile this driver as a module, choose M here: the diff --git a/drivers/watchdog/acquirewdt.c b/drivers/watchdog/acquirewdt.c index 957d1255d4ca..848db958411e 100644 --- a/drivers/watchdog/acquirewdt.c +++ b/drivers/watchdog/acquirewdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Acquire Single Board Computer Watchdog Timer driver * @@ -6,11 +7,6 @@ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/advantechwdt.c b/drivers/watchdog/advantechwdt.c index 2766af292a71..0d02bb275b3d 100644 --- a/drivers/watchdog/advantechwdt.c +++ b/drivers/watchdog/advantechwdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Advantech Single Board Computer WDT driver * @@ -9,11 +10,6 @@ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index f0148637e5dd..cc71861e033a 100644 --- a/drivers/watchdog/aspeed_wdt.c +++ b/drivers/watchdog/aspeed_wdt.c @@ -309,13 +309,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) if (status & WDT_TIMEOUT_STATUS_BOOT_SECONDARY) wdt->wdd.bootstatus = WDIOF_CARDRESET; - ret = devm_watchdog_register_device(dev, &wdt->wdd); - if (ret) { - dev_err(dev, "failed to register\n"); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, &wdt->wdd); } static struct platform_driver aspeed_watchdog_driver = { diff --git a/drivers/watchdog/ath79_wdt.c b/drivers/watchdog/ath79_wdt.c index 02234c254b10..2e09981fe978 100644 --- a/drivers/watchdog/ath79_wdt.c +++ b/drivers/watchdog/ath79_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Atheros AR71XX/AR724X/AR913X built-in hardware watchdog timer. * @@ -10,11 +11,6 @@ * * which again was based on sa1100 driver, * Copyright (C) 2000 Oleg Drokin <green@crimea.edu> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/bcm2835_wdt.c b/drivers/watchdog/bcm2835_wdt.c index 560c1c54c177..dec6ca019bea 100644 --- a/drivers/watchdog/bcm2835_wdt.c +++ b/drivers/watchdog/bcm2835_wdt.c @@ -202,10 +202,8 @@ static int bcm2835_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(&bcm2835_wdt_wdd); err = devm_watchdog_register_device(dev, &bcm2835_wdt_wdd); - if (err) { - dev_err(dev, "Failed to register watchdog device"); + if (err) return err; - } if (pm_power_off == NULL) { pm_power_off = bcm2835_power_off; @@ -240,6 +238,7 @@ module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +MODULE_ALIAS("platform:bcm2835-wdt"); MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>"); MODULE_DESCRIPTION("Driver for Broadcom BCM2835 watchdog timer"); MODULE_LICENSE("GPL"); diff --git a/drivers/watchdog/bcm7038_wdt.c b/drivers/watchdog/bcm7038_wdt.c index d3d88f6703d7..979caa18d3c8 100644 --- a/drivers/watchdog/bcm7038_wdt.c +++ b/drivers/watchdog/bcm7038_wdt.c @@ -159,10 +159,8 @@ static int bcm7038_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(&wdt->wdd); watchdog_stop_on_unregister(&wdt->wdd); err = devm_watchdog_register_device(dev, &wdt->wdd); - if (err) { - dev_err(dev, "Failed to register watchdog device\n"); + if (err) return err; - } dev_info(dev, "Registered BCM7038 Watchdog\n"); diff --git a/drivers/watchdog/bcm_kona_wdt.c b/drivers/watchdog/bcm_kona_wdt.c index e2ad44816359..eb850a8d19df 100644 --- a/drivers/watchdog/bcm_kona_wdt.c +++ b/drivers/watchdog/bcm_kona_wdt.c @@ -143,24 +143,18 @@ static void bcm_kona_wdt_debug_init(struct platform_device *pdev) wdt->debugfs = NULL; dir = debugfs_create_dir(BCM_KONA_WDT_NAME, NULL); - if (IS_ERR_OR_NULL(dir)) - return; - if (debugfs_create_file("info", S_IFREG | S_IRUGO, dir, wdt, - &bcm_kona_fops)) - wdt->debugfs = dir; - else - debugfs_remove_recursive(dir); + debugfs_create_file("info", S_IFREG | S_IRUGO, dir, wdt, + &bcm_kona_fops); + wdt->debugfs = dir; } static void bcm_kona_wdt_debug_exit(struct platform_device *pdev) { struct bcm_kona_wdt *wdt = platform_get_drvdata(pdev); - if (wdt && wdt->debugfs) { + if (wdt) debugfs_remove_recursive(wdt->debugfs); - wdt->debugfs = NULL; - } } #else @@ -307,10 +301,8 @@ static int bcm_kona_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(&bcm_kona_wdt_wdd); watchdog_stop_on_unregister(&bcm_kona_wdt_wdd); ret = devm_watchdog_register_device(dev, &bcm_kona_wdt_wdd); - if (ret) { - dev_err(dev, "Failed to register watchdog device"); + if (ret) return ret; - } bcm_kona_wdt_debug_init(pdev); dev_dbg(dev, "Broadcom Kona Watchdog Timer"); diff --git a/drivers/watchdog/cadence_wdt.c b/drivers/watchdog/cadence_wdt.c index a22f2d431a35..f8d4e91d0383 100644 --- a/drivers/watchdog/cadence_wdt.c +++ b/drivers/watchdog/cadence_wdt.c @@ -363,10 +363,8 @@ static int cdns_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(cdns_wdt_device); watchdog_stop_on_unregister(cdns_wdt_device); ret = devm_watchdog_register_device(dev, cdns_wdt_device); - if (ret) { - dev_err(dev, "Failed to register wdt device\n"); + if (ret) return ret; - } platform_set_drvdata(pdev, wdt); dev_info(dev, "Xilinx Watchdog Timer at %p with timeout %ds%s\n", diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c index a2feef1ff307..d708c091bf1b 100644 --- a/drivers/watchdog/da9052_wdt.c +++ b/drivers/watchdog/da9052_wdt.c @@ -176,14 +176,7 @@ static int da9052_wdt_probe(struct platform_device *pdev) return ret; } - ret = devm_watchdog_register_device(dev, &driver_data->wdt); - if (ret != 0) { - dev_err(da9052->dev, "watchdog_register_device() failed: %d\n", - ret); - return ret; - } - - return ret; + return devm_watchdog_register_device(dev, &driver_data->wdt); } static struct platform_driver da9052_wdt_driver = { diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c index aac749cfaccb..e149e66a6ea9 100644 --- a/drivers/watchdog/da9062_wdt.c +++ b/drivers/watchdog/da9062_wdt.c @@ -214,11 +214,8 @@ static int da9062_wdt_probe(struct platform_device *pdev) watchdog_set_drvdata(&wdt->wdtdev, wdt); ret = devm_watchdog_register_device(dev, &wdt->wdtdev); - if (ret < 0) { - dev_err(wdt->hw->dev, - "watchdog registration failed (%d)\n", ret); + if (ret < 0) return ret; - } return da9062_wdt_ping(&wdt->wdtdev); } diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c index 7b2ee35b5ffd..2b3f3cd382ef 100644 --- a/drivers/watchdog/davinci_wdt.c +++ b/drivers/watchdog/davinci_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * drivers/char/watchdog/davinci_wdt.c * @@ -5,10 +6,7 @@ * * Copyright (C) 2006-2013 Texas Instruments. * - * 2007 (c) MontaVista Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. + * 2007 (c) MontaVista Software, Inc. */ #include <linux/module.h> @@ -247,13 +245,7 @@ static int davinci_wdt_probe(struct platform_device *pdev) if (IS_ERR(davinci_wdt->base)) return PTR_ERR(davinci_wdt->base); - ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "cannot register watchdog device\n"); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, wdd); } static const struct of_device_id davinci_wdt_of_match[] = { diff --git a/drivers/watchdog/digicolor_wdt.c b/drivers/watchdog/digicolor_wdt.c index 8af6e9a67d0d..073d37867f47 100644 --- a/drivers/watchdog/digicolor_wdt.c +++ b/drivers/watchdog/digicolor_wdt.c @@ -118,7 +118,6 @@ static int dc_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dc_wdt *wdt; - int ret; wdt = devm_kzalloc(dev, sizeof(struct dc_wdt), GFP_KERNEL); if (!wdt) @@ -141,13 +140,7 @@ static int dc_wdt_probe(struct platform_device *pdev) watchdog_set_restart_priority(&dc_wdt_wdd, 128); watchdog_init_timeout(&dc_wdt_wdd, timeout, dev); watchdog_stop_on_reboot(&dc_wdt_wdd); - ret = devm_watchdog_register_device(dev, &dc_wdt_wdd); - if (ret) { - dev_err(dev, "Failed to register watchdog device"); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, &dc_wdt_wdd); } static const struct of_device_id dc_wdt_of_match[] = { diff --git a/drivers/watchdog/ebc-c384_wdt.c b/drivers/watchdog/ebc-c384_wdt.c index c176f59fea28..8ef4b0df3855 100644 --- a/drivers/watchdog/ebc-c384_wdt.c +++ b/drivers/watchdog/ebc-c384_wdt.c @@ -2,15 +2,6 @@ /* * Watchdog timer driver for the WinSystems EBC-C384 * Copyright (C) 2016 William Breathitt Gray - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2, as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. */ #include <linux/device.h> #include <linux/dmi.h> diff --git a/drivers/watchdog/eurotechwdt.c b/drivers/watchdog/eurotechwdt.c index 89129e6fa9b6..3a83a48abcae 100644 --- a/drivers/watchdog/eurotechwdt.c +++ b/drivers/watchdog/eurotechwdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Eurotech CPU-1220/1410/1420 on board WDT driver * @@ -11,11 +12,6 @@ * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/ftwdt010_wdt.c b/drivers/watchdog/ftwdt010_wdt.c index 9ea0e56fa7ee..21dcc7765688 100644 --- a/drivers/watchdog/ftwdt010_wdt.c +++ b/drivers/watchdog/ftwdt010_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Watchdog driver for Faraday Technology FTWDT010 * @@ -5,10 +6,6 @@ * * Inspired by the out-of-tree drivers from OpenWRT: * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/bitops.h> @@ -168,10 +165,8 @@ static int ftwdt010_wdt_probe(struct platform_device *pdev) } ret = devm_watchdog_register_device(dev, &gwdt->wdd); - if (ret) { - dev_err(dev, "failed to register watchdog\n"); + if (ret) return ret; - } /* Set up platform driver data */ platform_set_drvdata(pdev, gwdt); diff --git a/drivers/watchdog/gpio_wdt.c b/drivers/watchdog/gpio_wdt.c index 777de10f2a78..0923201ce874 100644 --- a/drivers/watchdog/gpio_wdt.c +++ b/drivers/watchdog/gpio_wdt.c @@ -13,6 +13,12 @@ #include <linux/platform_device.h> #include <linux/watchdog.h> +static bool nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, bool, 0); +MODULE_PARM_DESC(nowayout, + "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + #define SOFT_TIMEOUT_MIN 1 #define SOFT_TIMEOUT_DEF 60 @@ -151,6 +157,7 @@ static int gpio_wdt_probe(struct platform_device *pdev) priv->wdd.timeout = SOFT_TIMEOUT_DEF; watchdog_init_timeout(&priv->wdd, 0, dev); + watchdog_set_nowayout(&priv->wdd, nowayout); watchdog_stop_on_reboot(&priv->wdd); diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index db1bf6f546ae..7d34bcf1c45b 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * HPE WatchDog Driver * based on @@ -6,11 +7,6 @@ * * (c) Copyright 2018 Hewlett Packard Enterprise Development LP * Thomas Mingarelli <thomas.mingarelli@hpe.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -26,10 +22,11 @@ #include <linux/watchdog.h> #include <asm/nmi.h> -#define HPWDT_VERSION "2.0.2" +#define HPWDT_VERSION "2.0.3" #define SECS_TO_TICKS(secs) ((secs) * 1000 / 128) #define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000) -#define HPWDT_MAX_TIMER TICKS_TO_SECS(65535) +#define HPWDT_MAX_TICKS 65535 +#define HPWDT_MAX_TIMER TICKS_TO_SECS(HPWDT_MAX_TICKS) #define DEFAULT_MARGIN 30 #define PRETIMEOUT_SEC 9 @@ -37,6 +34,7 @@ static bool ilo5; static unsigned int soft_margin = DEFAULT_MARGIN; /* in seconds */ static bool nowayout = WATCHDOG_NOWAYOUT; static bool pretimeout = IS_ENABLED(CONFIG_HPWDT_NMI_DECODING); +static int kdumptimeout = -1; static void __iomem *pci_mem_addr; /* the PCI-memory address */ static unsigned long __iomem *hpwdt_nmistat; @@ -56,15 +54,21 @@ static const struct pci_device_id hpwdt_blacklist[] = { {0}, /* terminate list */ }; +static struct watchdog_device hpwdt_dev; /* * Watchdog operations */ +static int hpwdt_hw_is_running(void) +{ + return ioread8(hpwdt_timer_con) & 0x01; +} + static int hpwdt_start(struct watchdog_device *wdd) { int control = 0x81 | (pretimeout ? 0x4 : 0); - int reload = SECS_TO_TICKS(wdd->timeout); + int reload = SECS_TO_TICKS(min(wdd->timeout, wdd->max_hw_heartbeat_ms/1000)); - dev_dbg(wdd->parent, "start watchdog 0x%08x:0x%02x\n", reload, control); + dev_dbg(wdd->parent, "start watchdog 0x%08x:0x%08x:0x%02x\n", wdd->timeout, reload, control); iowrite16(reload, hpwdt_timer_reg); iowrite8(control, hpwdt_timer_con); @@ -89,12 +93,18 @@ static int hpwdt_stop_core(struct watchdog_device *wdd) return 0; } +static void hpwdt_ping_ticks(int val) +{ + val = min(val, HPWDT_MAX_TICKS); + iowrite16(val, hpwdt_timer_reg); +} + static int hpwdt_ping(struct watchdog_device *wdd) { - int reload = SECS_TO_TICKS(wdd->timeout); + int reload = SECS_TO_TICKS(min(wdd->timeout, wdd->max_hw_heartbeat_ms/1000)); - dev_dbg(wdd->parent, "ping watchdog 0x%08x\n", reload); - iowrite16(reload, hpwdt_timer_reg); + dev_dbg(wdd->parent, "ping watchdog 0x%08x:0x%08x\n", wdd->timeout, reload); + hpwdt_ping_ticks(reload); return 0; } @@ -170,7 +180,14 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) if (ilo5 && !pretimeout && !mynmi) return NMI_DONE; - hpwdt_stop(); + if (kdumptimeout < 0) + hpwdt_stop(); + else if (kdumptimeout == 0) + ; + else { + unsigned int val = max((unsigned int)kdumptimeout, hpwdt_dev.timeout); + hpwdt_ping_ticks(SECS_TO_TICKS(val)); + } hex_byte_pack(panic_msg, mynmi); nmi_panic(regs, panic_msg); @@ -208,9 +225,9 @@ static struct watchdog_device hpwdt_dev = { .info = &ident, .ops = &hpwdt_ops, .min_timeout = 1, - .max_timeout = HPWDT_MAX_TIMER, .timeout = DEFAULT_MARGIN, .pretimeout = PRETIMEOUT_SEC, + .max_hw_heartbeat_ms = HPWDT_MAX_TIMER * 1000, }; @@ -302,14 +319,18 @@ static int hpwdt_init_one(struct pci_dev *dev, hpwdt_timer_reg = pci_mem_addr + 0x70; hpwdt_timer_con = pci_mem_addr + 0x72; - /* Make sure that timer is disabled until /dev/watchdog is opened */ - hpwdt_stop(); + /* Have the core update running timer until user space is ready */ + if (hpwdt_hw_is_running()) { + dev_info(&dev->dev, "timer is running\n"); + set_bit(WDOG_HW_RUNNING, &hpwdt_dev.status); + } /* Initialize NMI Decoding functionality */ retval = hpwdt_init_nmi_decoding(dev); if (retval != 0) goto error_init_nmi_decoding; + watchdog_stop_on_unregister(&hpwdt_dev); watchdog_set_nowayout(&hpwdt_dev, nowayout); watchdog_init_timeout(&hpwdt_dev, soft_margin, NULL); @@ -318,13 +339,12 @@ static int hpwdt_init_one(struct pci_dev *dev, pretimeout = 0; } hpwdt_dev.pretimeout = pretimeout ? PRETIMEOUT_SEC : 0; + kdumptimeout = min(kdumptimeout, HPWDT_MAX_TIMER); hpwdt_dev.parent = &dev->dev; retval = watchdog_register_device(&hpwdt_dev); - if (retval < 0) { - dev_err(&dev->dev, "watchdog register failed: %d.\n", retval); + if (retval < 0) goto error_wd_register; - } dev_info(&dev->dev, "HPE Watchdog Timer Driver: Version: %s\n", HPWDT_VERSION); @@ -332,6 +352,7 @@ static int hpwdt_init_one(struct pci_dev *dev, hpwdt_dev.timeout, nowayout); dev_info(&dev->dev, "pretimeout: %s.\n", pretimeout ? "on" : "off"); + dev_info(&dev->dev, "kdumptimeout: %d.\n", kdumptimeout); if (dev->subsystem_vendor == PCI_VENDOR_ID_HP_3PAR) ilo5 = true; @@ -349,9 +370,6 @@ error_pci_iomap: static void hpwdt_exit(struct pci_dev *dev) { - if (!nowayout) - hpwdt_stop(); - watchdog_unregister_device(&hpwdt_dev); hpwdt_exit_nmi_decoding(); pci_iounmap(dev, pci_mem_addr); @@ -380,6 +398,9 @@ module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +module_param(kdumptimeout, int, 0444); +MODULE_PARM_DESC(kdumptimeout, "Timeout applied for crash kernel transition in seconds"); + #ifdef CONFIG_HPWDT_NMI_DECODING module_param(pretimeout, bool, 0); MODULE_PARM_DESC(pretimeout, "Watchdog pretimeout enabled"); diff --git a/drivers/watchdog/i6300esb.c b/drivers/watchdog/i6300esb.c index f98f35a05896..a30835f547b3 100644 --- a/drivers/watchdog/i6300esb.c +++ b/drivers/watchdog/i6300esb.c @@ -315,11 +315,8 @@ static int esb_probe(struct pci_dev *pdev, /* Register the watchdog so that userspace has access to it */ ret = watchdog_register_device(&edev->wdd); - if (ret != 0) { - dev_err(&pdev->dev, - "cannot register watchdog device (err=%d)\n", ret); + if (ret != 0) goto err_unmap; - } dev_info(&pdev->dev, "initialized. heartbeat=%d sec (nowayout=%d)\n", edev->wdd.timeout, nowayout); diff --git a/drivers/watchdog/iTCO_vendor_support.c b/drivers/watchdog/iTCO_vendor_support.c index 68a9d9cc2eb8..4f1b96f59349 100644 --- a/drivers/watchdog/iTCO_vendor_support.c +++ b/drivers/watchdog/iTCO_vendor_support.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * intel TCO vendor specific watchdog driver support * * (c) Copyright 2006-2009 Wim Van Sebroeck <wim@iguana.be>. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. @@ -216,4 +212,3 @@ MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>, " MODULE_DESCRIPTION("Intel TCO Vendor Specific WatchDog Timer Driver Support"); MODULE_VERSION(DRV_VERSION); MODULE_LICENSE("GPL"); - diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c index 89cea6ce9a08..c559f706ae7e 100644 --- a/drivers/watchdog/iTCO_wdt.c +++ b/drivers/watchdog/iTCO_wdt.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * intel TCO Watchdog Driver * * (c) Copyright 2006-2011 Wim Van Sebroeck <wim@iguana.be>. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. diff --git a/drivers/watchdog/ib700wdt.c b/drivers/watchdog/ib700wdt.c index 30d6cec582af..92fd7f33bc4d 100644 --- a/drivers/watchdog/ib700wdt.c +++ b/drivers/watchdog/ib700wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * IB700 Single Board Computer WDT driver * @@ -14,11 +15,6 @@ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/ie6xx_wdt.c b/drivers/watchdog/ie6xx_wdt.c index 508fbefce9f6..8f28993fab8b 100644 --- a/drivers/watchdog/ie6xx_wdt.c +++ b/drivers/watchdog/ie6xx_wdt.c @@ -66,7 +66,7 @@ MODULE_PARM_DESC(resetmode, static struct { unsigned short sch_wdtba; - struct spinlock unlock_sequence; + spinlock_t unlock_sequence; #ifdef CONFIG_DEBUG_FS struct dentry *debugfs; #endif @@ -254,12 +254,8 @@ static int ie6xx_wdt_probe(struct platform_device *pdev) ie6xx_wdt_debugfs_init(); ret = watchdog_register_device(&ie6xx_wdt_dev); - if (ret) { - dev_err(&pdev->dev, - "Watchdog timer: cannot register device (err =%d)\n", - ret); + if (ret) goto misc_register_error; - } return 0; diff --git a/drivers/watchdog/imgpdc_wdt.c b/drivers/watchdog/imgpdc_wdt.c index 0fc31aadeee3..b57ff3787052 100644 --- a/drivers/watchdog/imgpdc_wdt.c +++ b/drivers/watchdog/imgpdc_wdt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Imagination Technologies PowerDown Controller Watchdog Timer. * * Copyright (c) 2014 Imagination Technologies Ltd. * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * * Based on drivers/watchdog/sunxi_wdt.c Copyright (c) 2013 Carlo Caione * 2012 Henrik Nordstrom * diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c index a606005dd65f..32af3974e6bb 100644 --- a/drivers/watchdog/imx2_wdt.c +++ b/drivers/watchdog/imx2_wdt.c @@ -316,10 +316,8 @@ static int __init imx2_wdt_probe(struct platform_device *pdev) regmap_write(wdev->regmap, IMX2_WDT_WMCR, 0); ret = watchdog_register_device(wdog); - if (ret) { - dev_err(&pdev->dev, "cannot register watchdog device\n"); + if (ret) goto disable_clk; - } dev_info(&pdev->dev, "timeout %d sec (nowayout=%d)\n", wdog->timeout, nowayout); diff --git a/drivers/watchdog/imx_sc_wdt.c b/drivers/watchdog/imx_sc_wdt.c index 49848b66186c..78eaaf75a263 100644 --- a/drivers/watchdog/imx_sc_wdt.c +++ b/drivers/watchdog/imx_sc_wdt.c @@ -4,6 +4,7 @@ */ #include <linux/arm-smccc.h> +#include <linux/firmware/imx/sci.h> #include <linux/io.h> #include <linux/init.h> #include <linux/kernel.h> @@ -33,11 +34,19 @@ #define SC_TIMER_WDOG_ACTION_PARTITION 0 +#define SC_IRQ_WDOG 1 +#define SC_IRQ_GROUP_WDOG 1 + static bool nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0000); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +struct imx_sc_wdt_device { + struct watchdog_device wdd; + struct notifier_block wdt_notifier; +}; + static int imx_sc_wdt_ping(struct watchdog_device *wdog) { struct arm_smccc_res res; @@ -85,24 +94,66 @@ static int imx_sc_wdt_set_timeout(struct watchdog_device *wdog, return res.a0 ? -EACCES : 0; } +static int imx_sc_wdt_set_pretimeout(struct watchdog_device *wdog, + unsigned int pretimeout) +{ + struct arm_smccc_res res; + + arm_smccc_smc(IMX_SIP_TIMER, IMX_SIP_TIMER_SET_PRETIME_WDOG, + pretimeout * 1000, 0, 0, 0, 0, 0, &res); + if (res.a0) + return -EACCES; + + wdog->pretimeout = pretimeout; + + return 0; +} + +static int imx_sc_wdt_notify(struct notifier_block *nb, + unsigned long event, void *group) +{ + struct imx_sc_wdt_device *imx_sc_wdd = + container_of(nb, + struct imx_sc_wdt_device, + wdt_notifier); + + if (event & SC_IRQ_WDOG && + *(u8 *)group == SC_IRQ_GROUP_WDOG) + watchdog_notify_pretimeout(&imx_sc_wdd->wdd); + + return 0; +} + +static void imx_sc_wdt_action(void *data) +{ + struct notifier_block *wdt_notifier = data; + + imx_scu_irq_unregister_notifier(wdt_notifier); + imx_scu_irq_group_enable(SC_IRQ_GROUP_WDOG, + SC_IRQ_WDOG, + false); +} + static const struct watchdog_ops imx_sc_wdt_ops = { .owner = THIS_MODULE, .start = imx_sc_wdt_start, .stop = imx_sc_wdt_stop, .ping = imx_sc_wdt_ping, .set_timeout = imx_sc_wdt_set_timeout, + .set_pretimeout = imx_sc_wdt_set_pretimeout, }; -static const struct watchdog_info imx_sc_wdt_info = { +static struct watchdog_info imx_sc_wdt_info = { .identity = "i.MX SC watchdog timer", .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | - WDIOF_MAGICCLOSE | WDIOF_PRETIMEOUT, + WDIOF_MAGICCLOSE, }; static int imx_sc_wdt_probe(struct platform_device *pdev) { + struct imx_sc_wdt_device *imx_sc_wdd; + struct watchdog_device *wdog; struct device *dev = &pdev->dev; - struct watchdog_device *imx_sc_wdd; int ret; imx_sc_wdd = devm_kzalloc(dev, sizeof(*imx_sc_wdd), GFP_KERNEL); @@ -111,42 +162,70 @@ static int imx_sc_wdt_probe(struct platform_device *pdev) platform_set_drvdata(pdev, imx_sc_wdd); - imx_sc_wdd->info = &imx_sc_wdt_info; - imx_sc_wdd->ops = &imx_sc_wdt_ops; - imx_sc_wdd->min_timeout = 1; - imx_sc_wdd->max_timeout = MAX_TIMEOUT; - imx_sc_wdd->parent = dev; - imx_sc_wdd->timeout = DEFAULT_TIMEOUT; - - watchdog_init_timeout(imx_sc_wdd, 0, dev); - watchdog_stop_on_reboot(imx_sc_wdd); - watchdog_stop_on_unregister(imx_sc_wdd); + wdog = &imx_sc_wdd->wdd; + wdog->info = &imx_sc_wdt_info; + wdog->ops = &imx_sc_wdt_ops; + wdog->min_timeout = 1; + wdog->max_timeout = MAX_TIMEOUT; + wdog->parent = dev; + wdog->timeout = DEFAULT_TIMEOUT; + + watchdog_init_timeout(wdog, 0, dev); + watchdog_stop_on_reboot(wdog); + watchdog_stop_on_unregister(wdog); + + ret = devm_watchdog_register_device(dev, wdog); + + if (ret) { + dev_err(dev, "Failed to register watchdog device\n"); + return ret; + } + + ret = imx_scu_irq_group_enable(SC_IRQ_GROUP_WDOG, + SC_IRQ_WDOG, + true); + if (ret) { + dev_warn(dev, "Enable irq failed, pretimeout NOT supported\n"); + return 0; + } - ret = devm_watchdog_register_device(dev, imx_sc_wdd); + imx_sc_wdd->wdt_notifier.notifier_call = imx_sc_wdt_notify; + ret = imx_scu_irq_register_notifier(&imx_sc_wdd->wdt_notifier); if (ret) { - dev_err(dev, "Failed to register watchdog device\n"); - return ret; + imx_scu_irq_group_enable(SC_IRQ_GROUP_WDOG, + SC_IRQ_WDOG, + false); + dev_warn(dev, + "Register irq notifier failed, pretimeout NOT supported\n"); + return 0; } + ret = devm_add_action_or_reset(dev, imx_sc_wdt_action, + &imx_sc_wdd->wdt_notifier); + if (!ret) + imx_sc_wdt_info.options |= WDIOF_PRETIMEOUT; + else + dev_warn(dev, "Add action failed, pretimeout NOT supported\n"); + return 0; } static int __maybe_unused imx_sc_wdt_suspend(struct device *dev) { - struct watchdog_device *imx_sc_wdd = dev_get_drvdata(dev); + struct imx_sc_wdt_device *imx_sc_wdd = dev_get_drvdata(dev); - if (watchdog_active(imx_sc_wdd)) - imx_sc_wdt_stop(imx_sc_wdd); + if (watchdog_active(&imx_sc_wdd->wdd)) + imx_sc_wdt_stop(&imx_sc_wdd->wdd); return 0; } static int __maybe_unused imx_sc_wdt_resume(struct device *dev) { - struct watchdog_device *imx_sc_wdd = dev_get_drvdata(dev); + struct imx_sc_wdt_device *imx_sc_wdd = dev_get_drvdata(dev); - if (watchdog_active(imx_sc_wdd)) - imx_sc_wdt_start(imx_sc_wdd); + if (watchdog_active(&imx_sc_wdd->wdd)) + imx_sc_wdt_start(&imx_sc_wdd->wdd); return 0; } diff --git a/drivers/watchdog/intel-mid_wdt.c b/drivers/watchdog/intel-mid_wdt.c index b2463f8276e6..2cdbd37c700c 100644 --- a/drivers/watchdog/intel-mid_wdt.c +++ b/drivers/watchdog/intel-mid_wdt.c @@ -161,10 +161,8 @@ static int mid_wdt_probe(struct platform_device *pdev) set_bit(WDOG_HW_RUNNING, &wdt_dev->status); ret = devm_watchdog_register_device(dev, wdt_dev); - if (ret) { - dev_err(dev, "error registering watchdog device\n"); + if (ret) return ret; - } dev_info(dev, "Intel MID watchdog device probed\n"); diff --git a/drivers/watchdog/jz4740_wdt.c b/drivers/watchdog/jz4740_wdt.c index 313358b2e0b1..d4a90916dd38 100644 --- a/drivers/watchdog/jz4740_wdt.c +++ b/drivers/watchdog/jz4740_wdt.c @@ -4,6 +4,7 @@ * JZ4740 Watchdog driver */ +#include <linux/mfd/ingenic-tcu.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/types.h> @@ -19,23 +20,16 @@ #include <asm/mach-jz4740/timer.h> -#define JZ_REG_WDT_TIMER_DATA 0x0 -#define JZ_REG_WDT_COUNTER_ENABLE 0x4 -#define JZ_REG_WDT_TIMER_COUNTER 0x8 -#define JZ_REG_WDT_TIMER_CONTROL 0xC - #define JZ_WDT_CLOCK_PCLK 0x1 #define JZ_WDT_CLOCK_RTC 0x2 #define JZ_WDT_CLOCK_EXT 0x4 -#define JZ_WDT_CLOCK_DIV_SHIFT 3 - -#define JZ_WDT_CLOCK_DIV_1 (0 << JZ_WDT_CLOCK_DIV_SHIFT) -#define JZ_WDT_CLOCK_DIV_4 (1 << JZ_WDT_CLOCK_DIV_SHIFT) -#define JZ_WDT_CLOCK_DIV_16 (2 << JZ_WDT_CLOCK_DIV_SHIFT) -#define JZ_WDT_CLOCK_DIV_64 (3 << JZ_WDT_CLOCK_DIV_SHIFT) -#define JZ_WDT_CLOCK_DIV_256 (4 << JZ_WDT_CLOCK_DIV_SHIFT) -#define JZ_WDT_CLOCK_DIV_1024 (5 << JZ_WDT_CLOCK_DIV_SHIFT) +#define JZ_WDT_CLOCK_DIV_1 (0 << TCU_TCSR_PRESCALE_LSB) +#define JZ_WDT_CLOCK_DIV_4 (1 << TCU_TCSR_PRESCALE_LSB) +#define JZ_WDT_CLOCK_DIV_16 (2 << TCU_TCSR_PRESCALE_LSB) +#define JZ_WDT_CLOCK_DIV_64 (3 << TCU_TCSR_PRESCALE_LSB) +#define JZ_WDT_CLOCK_DIV_256 (4 << TCU_TCSR_PRESCALE_LSB) +#define JZ_WDT_CLOCK_DIV_1024 (5 << TCU_TCSR_PRESCALE_LSB) #define DEFAULT_HEARTBEAT 5 #define MAX_HEARTBEAT 2048 @@ -63,7 +57,7 @@ static int jz4740_wdt_ping(struct watchdog_device *wdt_dev) { struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); - writew(0x0, drvdata->base + JZ_REG_WDT_TIMER_COUNTER); + writew(0x0, drvdata->base + TCU_REG_WDT_TCNT); return 0; } @@ -74,6 +68,7 @@ static int jz4740_wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int rtc_clk_rate; unsigned int timeout_value; unsigned short clock_div = JZ_WDT_CLOCK_DIV_1; + u8 tcer; rtc_clk_rate = clk_get_rate(drvdata->rtc_clk); @@ -86,18 +81,19 @@ static int jz4740_wdt_set_timeout(struct watchdog_device *wdt_dev, break; } timeout_value >>= 2; - clock_div += (1 << JZ_WDT_CLOCK_DIV_SHIFT); + clock_div += (1 << TCU_TCSR_PRESCALE_LSB); } - writeb(0x0, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE); - writew(clock_div, drvdata->base + JZ_REG_WDT_TIMER_CONTROL); + tcer = readb(drvdata->base + TCU_REG_WDT_TCER); + writeb(0x0, drvdata->base + TCU_REG_WDT_TCER); + writew(clock_div, drvdata->base + TCU_REG_WDT_TCSR); - writew((u16)timeout_value, drvdata->base + JZ_REG_WDT_TIMER_DATA); - writew(0x0, drvdata->base + JZ_REG_WDT_TIMER_COUNTER); - writew(clock_div | JZ_WDT_CLOCK_RTC, - drvdata->base + JZ_REG_WDT_TIMER_CONTROL); + writew((u16)timeout_value, drvdata->base + TCU_REG_WDT_TDR); + writew(0x0, drvdata->base + TCU_REG_WDT_TCNT); + writew(clock_div | JZ_WDT_CLOCK_RTC, drvdata->base + TCU_REG_WDT_TCSR); - writeb(0x1, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE); + if (tcer & TCU_WDT_TCER_TCEN) + writeb(TCU_WDT_TCER_TCEN, drvdata->base + TCU_REG_WDT_TCER); wdt_dev->timeout = new_timeout; return 0; @@ -105,9 +101,18 @@ static int jz4740_wdt_set_timeout(struct watchdog_device *wdt_dev, static int jz4740_wdt_start(struct watchdog_device *wdt_dev) { + struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); + u8 tcer; + + tcer = readb(drvdata->base + TCU_REG_WDT_TCER); + jz4740_timer_enable_watchdog(); jz4740_wdt_set_timeout(wdt_dev, wdt_dev->timeout); + /* Start watchdog if it wasn't started already */ + if (!(tcer & TCU_WDT_TCER_TCEN)) + writeb(TCU_WDT_TCER_TCEN, drvdata->base + TCU_REG_WDT_TCER); + return 0; } @@ -115,7 +120,7 @@ static int jz4740_wdt_stop(struct watchdog_device *wdt_dev) { struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); - writeb(0x0, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE); + writeb(0x0, drvdata->base + TCU_REG_WDT_TCER); jz4740_timer_disable_watchdog(); return 0; @@ -187,11 +192,7 @@ static int jz4740_wdt_probe(struct platform_device *pdev) return PTR_ERR(drvdata->rtc_clk); } - ret = devm_watchdog_register_device(dev, &drvdata->wdt); - if (ret < 0) - return ret; - - return 0; + return devm_watchdog_register_device(dev, &drvdata->wdt); } static struct platform_driver jz4740_wdt_driver = { diff --git a/drivers/watchdog/ks8695_wdt.c b/drivers/watchdog/ks8695_wdt.c index 0565cf30017b..1550ce3c5702 100644 --- a/drivers/watchdog/ks8695_wdt.c +++ b/drivers/watchdog/ks8695_wdt.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Watchdog driver for Kendin/Micrel KS8695. * * (C) 2007 Andrew Victor - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/lantiq_wdt.c b/drivers/watchdog/lantiq_wdt.c index 4caf02ba5d49..6fab504af88b 100644 --- a/drivers/watchdog/lantiq_wdt.c +++ b/drivers/watchdog/lantiq_wdt.c @@ -1,7 +1,5 @@ +// SPDX-License-Identifier: GPL-2.0-only /* - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. * * Copyright (C) 2010 John Crispin <john@phrozen.org> * Copyright (C) 2017 Hauke Mehrtens <hauke@hauke-m.de> diff --git a/drivers/watchdog/loongson1_wdt.c b/drivers/watchdog/loongson1_wdt.c index c8c2b8a88fc2..bb3d075c0633 100644 --- a/drivers/watchdog/loongson1_wdt.c +++ b/drivers/watchdog/loongson1_wdt.c @@ -132,10 +132,8 @@ static int ls1x_wdt_probe(struct platform_device *pdev) watchdog_set_drvdata(ls1x_wdt, drvdata); err = devm_watchdog_register_device(dev, &drvdata->wdt); - if (err) { - dev_err(dev, "failed to register watchdog device\n"); + if (err) return err; - } platform_set_drvdata(pdev, drvdata); diff --git a/drivers/watchdog/lpc18xx_wdt.c b/drivers/watchdog/lpc18xx_wdt.c index 0e82abd71d35..78cf11c94941 100644 --- a/drivers/watchdog/lpc18xx_wdt.c +++ b/drivers/watchdog/lpc18xx_wdt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * NXP LPC18xx Watchdog Timer (WDT) * * Copyright (c) 2015 Ariel D'Alessandro <ariel@vanguardiasur.com> * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * * Notes * ----- * The Watchdog consists of a fixed divide-by-4 clock pre-scaler and a 24-bit diff --git a/drivers/watchdog/max77620_wdt.c b/drivers/watchdog/max77620_wdt.c index 3ca6b9337932..be6a53c30002 100644 --- a/drivers/watchdog/max77620_wdt.c +++ b/drivers/watchdog/max77620_wdt.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Maxim MAX77620 Watchdog Driver * * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved. * * Author: Laxman Dewangan <ldewangan@nvidia.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/err.h> @@ -185,13 +182,7 @@ static int max77620_wdt_probe(struct platform_device *pdev) watchdog_set_drvdata(wdt_dev, wdt); watchdog_stop_on_unregister(wdt_dev); - ret = devm_watchdog_register_device(dev, wdt_dev); - if (ret < 0) { - dev_err(dev, "watchdog registration failed: %d\n", ret); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, wdt_dev); } static const struct platform_device_id max77620_wdt_devtype[] = { diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c index 8023cf28657a..5391bf3e6b11 100644 --- a/drivers/watchdog/mei_wdt.c +++ b/drivers/watchdog/mei_wdt.c @@ -384,10 +384,8 @@ static int mei_wdt_register(struct mei_wdt *wdt) watchdog_stop_on_reboot(&wdt->wdd); ret = watchdog_register_device(&wdt->wdd); - if (ret) { - dev_err(dev, "unable to register watchdog device = %d.\n", ret); + if (ret) watchdog_set_drvdata(&wdt->wdd, NULL); - } wdt->state = MEI_WDT_IDLE; @@ -539,38 +537,23 @@ static void dbgfs_unregister(struct mei_wdt *wdt) wdt->dbgfs_dir = NULL; } -static int dbgfs_register(struct mei_wdt *wdt) +static void dbgfs_register(struct mei_wdt *wdt) { - struct dentry *dir, *f; + struct dentry *dir; dir = debugfs_create_dir(KBUILD_MODNAME, NULL); - if (!dir) - return -ENOMEM; - wdt->dbgfs_dir = dir; - f = debugfs_create_file("state", S_IRUSR, dir, wdt, &dbgfs_fops_state); - if (!f) - goto err; - f = debugfs_create_file("activation", S_IRUSR, - dir, wdt, &dbgfs_fops_activation); - if (!f) - goto err; + debugfs_create_file("state", S_IRUSR, dir, wdt, &dbgfs_fops_state); - return 0; -err: - dbgfs_unregister(wdt); - return -ENODEV; + debugfs_create_file("activation", S_IRUSR, dir, wdt, + &dbgfs_fops_activation); } #else static inline void dbgfs_unregister(struct mei_wdt *wdt) {} - -static inline int dbgfs_register(struct mei_wdt *wdt) -{ - return 0; -} +static inline void dbgfs_register(struct mei_wdt *wdt) {} #endif /* CONFIG_DEBUG_FS */ static int mei_wdt_probe(struct mei_cl_device *cldev, @@ -623,8 +606,7 @@ static int mei_wdt_probe(struct mei_cl_device *cldev, if (ret) goto err_disable; - if (dbgfs_register(wdt)) - dev_warn(&cldev->dev, "cannot register debugfs\n"); + dbgfs_register(wdt); return 0; diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c index e9ca4e0e25dc..99d2359d5a8a 100644 --- a/drivers/watchdog/mena21_wdt.c +++ b/drivers/watchdog/mena21_wdt.c @@ -190,10 +190,8 @@ static int a21_wdt_probe(struct platform_device *pdev) dev_set_drvdata(dev, drv); ret = devm_watchdog_register_device(dev, &a21_wdt); - if (ret) { - dev_err(dev, "Cannot register watchdog device\n"); + if (ret) return ret; - } dev_info(dev, "MEN A21 watchdog timer driver enabled\n"); diff --git a/drivers/watchdog/menf21bmc_wdt.c b/drivers/watchdog/menf21bmc_wdt.c index 7766d7361d3b..81ebdfc371f4 100644 --- a/drivers/watchdog/menf21bmc_wdt.c +++ b/drivers/watchdog/menf21bmc_wdt.c @@ -152,10 +152,8 @@ static int menf21bmc_wdt_probe(struct platform_device *pdev) } ret = devm_watchdog_register_device(dev, &drv_data->wdt); - if (ret) { - dev_err(dev, "failed to register Watchdog device\n"); + if (ret) return ret; - } dev_info(dev, "MEN 14F021P00 BMC Watchdog device enabled\n"); diff --git a/drivers/watchdog/mpc8xxx_wdt.c b/drivers/watchdog/mpc8xxx_wdt.c index b6ffad421bd0..3fc457bc16db 100644 --- a/drivers/watchdog/mpc8xxx_wdt.c +++ b/drivers/watchdog/mpc8xxx_wdt.c @@ -201,11 +201,8 @@ static int mpc8xxx_wdt_probe(struct platform_device *ofdev) ddata->wdd.timeout = ddata->wdd.min_timeout; ret = devm_watchdog_register_device(dev, &ddata->wdd); - if (ret) { - dev_err(dev, "cannot register watchdog device (err=%d)\n", - ret); + if (ret) return ret; - } dev_info(dev, "WDT driver for MPC8xxx initialized. mode:%s timeout=%d sec\n", diff --git a/drivers/watchdog/mt7621_wdt.c b/drivers/watchdog/mt7621_wdt.c index cbb3c0dde136..a8aa3522cfda 100644 --- a/drivers/watchdog/mt7621_wdt.c +++ b/drivers/watchdog/mt7621_wdt.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Ralink MT7621/MT7628 built-in hardware watchdog timer * * Copyright (C) 2014 John Crispin <john@phrozen.org> * * This driver was based on: drivers/watchdog/rt2880_wdt.c - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. */ #include <linux/clk.h> diff --git a/drivers/watchdog/mv64x60_wdt.c b/drivers/watchdog/mv64x60_wdt.c index c785f4f0a196..74bf7144a970 100644 --- a/drivers/watchdog/mv64x60_wdt.c +++ b/drivers/watchdog/mv64x60_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * mv64x60_wdt.c - MV64X60 (Marvell Discovery) watchdog userspace interface * @@ -9,10 +10,7 @@ * * Derived from mpc8xx_wdt.c, with the following copyright. * - * 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. + * 2002 (c) Florian Schirmer <jolt@tuxbox.org> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/ni903x_wdt.c b/drivers/watchdog/ni903x_wdt.c index 60f5608af2a8..4cebad324b20 100644 --- a/drivers/watchdog/ni903x_wdt.c +++ b/drivers/watchdog/ni903x_wdt.c @@ -211,10 +211,8 @@ static int ni903x_acpi_add(struct acpi_device *device) watchdog_init_timeout(wdd, timeout, dev); ret = watchdog_register_device(wdd); - if (ret) { - dev_err(dev, "failed to register watchdog\n"); + if (ret) return ret; - } /* Switch from boot mode to user mode */ outb(NIWD_CONTROL_RESET | NIWD_CONTROL_MODE, diff --git a/drivers/watchdog/nic7018_wdt.c b/drivers/watchdog/nic7018_wdt.c index 2e1a2a3d4ec9..2a46cc662943 100644 --- a/drivers/watchdog/nic7018_wdt.c +++ b/drivers/watchdog/nic7018_wdt.c @@ -210,7 +210,6 @@ static int nic7018_probe(struct platform_device *pdev) ret = watchdog_register_device(wdd); if (ret) { outb(LOCK, wdt->io_base + WDT_REG_LOCK); - dev_err(dev, "failed to register watchdog\n"); return ret; } diff --git a/drivers/watchdog/npcm_wdt.c b/drivers/watchdog/npcm_wdt.c index 9d6c1689b12c..9c773c3d6d5d 100644 --- a/drivers/watchdog/npcm_wdt.c +++ b/drivers/watchdog/npcm_wdt.c @@ -220,10 +220,8 @@ static int npcm_wdt_probe(struct platform_device *pdev) return ret; ret = devm_watchdog_register_device(dev, &wdt->wdd); - if (ret) { - dev_err(dev, "failed to register watchdog\n"); + if (ret) return ret; - } dev_info(dev, "NPCM watchdog driver enabled\n"); diff --git a/drivers/watchdog/nv_tco.h b/drivers/watchdog/nv_tco.h index c2d1d04e055b..d325e528010f 100644 --- a/drivers/watchdog/nv_tco.h +++ b/drivers/watchdog/nv_tco.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * nv_tco: TCO timer driver for nVidia chipsets. * @@ -10,11 +11,6 @@ * Reserved. * http://www.kernelconcepts.de * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither kernel concepts nor Nils Faerber admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/octeon-wdt-main.c b/drivers/watchdog/octeon-wdt-main.c index 0ec419a3f7ed..fde9e739b436 100644 --- a/drivers/watchdog/octeon-wdt-main.c +++ b/drivers/watchdog/octeon-wdt-main.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Octeon Watchdog driver * @@ -10,22 +11,12 @@ * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. * * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk> * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * * The OCTEON watchdog has a maximum timeout of 2^32 * io_clock. * For most systems this is less than 10 seconds, so to allow for * software to request longer watchdog heartbeats, we maintain software diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c index 03786992b701..7fe4f7c3f7ce 100644 --- a/drivers/watchdog/of_xilinx_wdt.c +++ b/drivers/watchdog/of_xilinx_wdt.c @@ -238,10 +238,8 @@ static int xwdt_probe(struct platform_device *pdev) } rc = devm_watchdog_register_device(dev, xilinx_wdt_wdd); - if (rc) { - dev_err(dev, "Cannot register watchdog (err=%d)\n", rc); + if (rc) return rc; - } clk_disable(xdev->clk); diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c index d49688d93f6a..9b91882fe3c4 100644 --- a/drivers/watchdog/omap_wdt.c +++ b/drivers/watchdog/omap_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * omap_wdt.c * @@ -6,10 +7,7 @@ * Author: MontaVista Software, Inc. * <gdavis@mvista.com> or <source@mvista.com> * - * 2003 (c) MontaVista Software, Inc. This file is licensed under the - * terms of the GNU General Public License version 2. This program is - * licensed "as is" without any warranty of any kind, whether express - * or implied. + * 2003 (c) MontaVista Software, Inc. * * History: * diff --git a/drivers/watchdog/omap_wdt.h b/drivers/watchdog/omap_wdt.h index 42f31ec5e90d..950b4643f3e7 100644 --- a/drivers/watchdog/omap_wdt.h +++ b/drivers/watchdog/omap_wdt.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * linux/drivers/char/watchdog/omap_wdt.h * @@ -5,26 +6,6 @@ * OMAP Watchdog timer register definitions * * Copyright (C) 2004 Texas Instruments. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _OMAP_WATCHDOG_H diff --git a/drivers/watchdog/pc87413_wdt.c b/drivers/watchdog/pc87413_wdt.c index ca21d6c240a3..2af1a8b3f973 100644 --- a/drivers/watchdog/pc87413_wdt.c +++ b/drivers/watchdog/pc87413_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * NS pc87413-wdt Watchdog Timer driver for Linux 2.6.x.x * @@ -6,11 +7,6 @@ * (C) Copyright 2006 Sven Anders, <anders@anduras.de> * and Marcus Junker, <junker@anduras.de> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Sven Anders, Marcus Junker nor ANDURAS AG * admit liability nor provide warranty for any of this software. * This material is provided "AS-IS" and at no charge. diff --git a/drivers/watchdog/pcwd_pci.c b/drivers/watchdog/pcwd_pci.c index 5773d2591d3f..e30c1f762045 100644 --- a/drivers/watchdog/pcwd_pci.c +++ b/drivers/watchdog/pcwd_pci.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Berkshire PCI-PC Watchdog Card Driver * @@ -10,11 +11,6 @@ * Matt Domsch <Matt_Domsch@dell.com>, * Rob Radez <rob@osinvestor.com> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. diff --git a/drivers/watchdog/pcwd_usb.c b/drivers/watchdog/pcwd_usb.c index 5de6182dae33..6727f8ab2d18 100644 --- a/drivers/watchdog/pcwd_usb.c +++ b/drivers/watchdog/pcwd_usb.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Berkshire USB-PC Watchdog Card Driver * @@ -10,11 +11,6 @@ * Rob Radez <rob@osinvestor.com>, * Greg Kroah-Hartman <greg@kroah.com> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. diff --git a/drivers/watchdog/pic32-dmt.c b/drivers/watchdog/pic32-dmt.c index 4f2aca78f13a..f43062b3c4c8 100644 --- a/drivers/watchdog/pic32-dmt.c +++ b/drivers/watchdog/pic32-dmt.c @@ -212,10 +212,8 @@ static int pic32_dmt_probe(struct platform_device *pdev) watchdog_set_drvdata(wdd, dmt); ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "watchdog register failed, err %d\n", ret); + if (ret) return ret; - } platform_set_drvdata(pdev, wdd); return 0; diff --git a/drivers/watchdog/pic32-wdt.c b/drivers/watchdog/pic32-wdt.c index 5ecdd880f0b7..41715d68d9e9 100644 --- a/drivers/watchdog/pic32-wdt.c +++ b/drivers/watchdog/pic32-wdt.c @@ -221,10 +221,8 @@ static int pic32_wdt_drv_probe(struct platform_device *pdev) watchdog_set_drvdata(wdd, wdt); ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "watchdog register failed, err %d\n", ret); + if (ret) return ret; - } platform_set_drvdata(pdev, wdd); diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c index d9e03544aeae..7b446b696f2b 100644 --- a/drivers/watchdog/pnx4008_wdt.c +++ b/drivers/watchdog/pnx4008_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * drivers/char/watchdog/pnx4008_wdt.c * @@ -11,10 +12,6 @@ * 2005-2006 (c) MontaVista Software, Inc. * * (C) 2012 Wolfram Sang, Pengutronix - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -221,10 +218,8 @@ static int pnx4008_wdt_probe(struct platform_device *pdev) set_bit(WDOG_HW_RUNNING, &pnx4008_wdd.status); ret = devm_watchdog_register_device(dev, &pnx4008_wdd); - if (ret < 0) { - dev_err(dev, "cannot register watchdog device\n"); + if (ret < 0) return ret; - } dev_info(dev, "heartbeat %d sec\n", pnx4008_wdd.timeout); diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c index fc0f7e5de38d..7be7f87be28f 100644 --- a/drivers/watchdog/qcom-wdt.c +++ b/drivers/watchdog/qcom-wdt.c @@ -223,10 +223,8 @@ static int qcom_wdt_probe(struct platform_device *pdev) watchdog_init_timeout(&wdt->wdd, 0, dev); ret = devm_watchdog_register_device(dev, &wdt->wdd); - if (ret) { - dev_err(dev, "failed to register watchdog\n"); + if (ret) return ret; - } platform_set_drvdata(pdev, wdt); return 0; diff --git a/drivers/watchdog/rave-sp-wdt.c b/drivers/watchdog/rave-sp-wdt.c index 35db173252f9..2c95615b6354 100644 --- a/drivers/watchdog/rave-sp-wdt.c +++ b/drivers/watchdog/rave-sp-wdt.c @@ -310,7 +310,6 @@ static int rave_sp_wdt_probe(struct platform_device *pdev) ret = devm_watchdog_register_device(dev, wdd); if (ret) { - dev_err(dev, "Failed to register watchdog device\n"); rave_sp_wdt_stop(wdd); return ret; } diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c index 565dbc1ec638..00662a8e039c 100644 --- a/drivers/watchdog/renesas_wdt.c +++ b/drivers/watchdog/renesas_wdt.c @@ -7,6 +7,7 @@ */ #include <linux/bitops.h> #include <linux/clk.h> +#include <linux/delay.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> @@ -70,6 +71,15 @@ static int rwdt_init_timeout(struct watchdog_device *wdev) return 0; } +static void rwdt_wait_cycles(struct rwdt_priv *priv, unsigned int cycles) +{ + unsigned int delay; + + delay = DIV_ROUND_UP(cycles * 1000000, priv->clk_rate); + + usleep_range(delay, 2 * delay); +} + static int rwdt_start(struct watchdog_device *wdev) { struct rwdt_priv *priv = watchdog_get_drvdata(wdev); @@ -80,6 +90,8 @@ static int rwdt_start(struct watchdog_device *wdev) /* Stop the timer before we modify any register */ val = readb_relaxed(priv->base + RWTCSRA) & ~RWTCSRA_TME; rwdt_write(priv, val, RWTCSRA); + /* Delay 2 cycles before setting watchdog counter */ + rwdt_wait_cycles(priv, 2); rwdt_init_timeout(wdev); rwdt_write(priv, priv->cks, RWTCSRA); @@ -98,6 +110,8 @@ static int rwdt_stop(struct watchdog_device *wdev) struct rwdt_priv *priv = watchdog_get_drvdata(wdev); rwdt_write(priv, priv->cks, RWTCSRA); + /* Delay 3 cycles before disabling module clock */ + rwdt_wait_cycles(priv, 3); pm_runtime_put(wdev->parent); return 0; @@ -175,15 +189,16 @@ static inline bool rwdt_blacklisted(struct device *dev) { return false; } static int rwdt_probe(struct platform_device *pdev) { + struct device *dev = &pdev->dev; struct rwdt_priv *priv; struct clk *clk; unsigned long clks_per_sec; int ret, i; - if (rwdt_blacklisted(&pdev->dev)) + if (rwdt_blacklisted(dev)) return -ENODEV; - priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; @@ -191,16 +206,16 @@ static int rwdt_probe(struct platform_device *pdev) if (IS_ERR(priv->base)) return PTR_ERR(priv->base); - clk = devm_clk_get(&pdev->dev, NULL); + clk = devm_clk_get(dev, NULL); if (IS_ERR(clk)) return PTR_ERR(clk); - pm_runtime_enable(&pdev->dev); - pm_runtime_get_sync(&pdev->dev); + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); priv->clk_rate = clk_get_rate(clk); priv->wdev.bootstatus = (readb_relaxed(priv->base + RWTCSRA) & RWTCSRA_WOVF) ? WDIOF_CARDRESET : 0; - pm_runtime_put(&pdev->dev); + pm_runtime_put(dev); if (!priv->clk_rate) { ret = -ENOENT; @@ -216,14 +231,14 @@ static int rwdt_probe(struct platform_device *pdev) } if (i < 0) { - dev_err(&pdev->dev, "Can't find suitable clock divider\n"); + dev_err(dev, "Can't find suitable clock divider\n"); ret = -ERANGE; goto out_pm_disable; } priv->wdev.info = &rwdt_ident; priv->wdev.ops = &rwdt_ops; - priv->wdev.parent = &pdev->dev; + priv->wdev.parent = dev; priv->wdev.min_timeout = 1; priv->wdev.max_timeout = DIV_BY_CLKS_PER_SEC(priv, 65536); priv->wdev.timeout = min(priv->wdev.max_timeout, RWDT_DEFAULT_TIMEOUT); @@ -235,7 +250,7 @@ static int rwdt_probe(struct platform_device *pdev) watchdog_stop_on_unregister(&priv->wdev); /* This overrides the default timeout only if DT configuration was found */ - watchdog_init_timeout(&priv->wdev, 0, &pdev->dev); + watchdog_init_timeout(&priv->wdev, 0, dev); ret = watchdog_register_device(&priv->wdev); if (ret < 0) @@ -244,7 +259,7 @@ static int rwdt_probe(struct platform_device *pdev) return 0; out_pm_disable: - pm_runtime_disable(&pdev->dev); + pm_runtime_disable(dev); return ret; } diff --git a/drivers/watchdog/retu_wdt.c b/drivers/watchdog/retu_wdt.c index 39cd51df2ffc..258dfcf9cbda 100644 --- a/drivers/watchdog/retu_wdt.c +++ b/drivers/watchdog/retu_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Retu watchdog driver * @@ -5,15 +6,6 @@ * * Based on code written by Amit Kucheria and Michael Buesch. * Rewritten by Aaro Koskinen. - * - * This file is subject to the terms and conditions of the GNU General - * Public License. See the file "COPYING" in the main directory of this - * archive for more details. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/slab.h> diff --git a/drivers/watchdog/rt2880_wdt.c b/drivers/watchdog/rt2880_wdt.c index 905e60f45eec..49aff800824d 100644 --- a/drivers/watchdog/rt2880_wdt.c +++ b/drivers/watchdog/rt2880_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Ralink RT288x/RT3xxx/MT76xx built-in hardware watchdog timer * @@ -5,10 +6,6 @@ * Copyright (C) 2013 John Crispin <john@phrozen.org> * * This driver was based on: drivers/watchdog/softdog.c - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. */ #include <linux/clk.h> diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c index daf3bf0d86b8..2395f353e52d 100644 --- a/drivers/watchdog/s3c2410_wdt.c +++ b/drivers/watchdog/s3c2410_wdt.c @@ -606,10 +606,8 @@ static int s3c2410wdt_probe(struct platform_device *pdev) wdt->wdt_device.parent = dev; ret = watchdog_register_device(&wdt->wdt_device); - if (ret) { - dev_err(dev, "cannot register watchdog (%d)\n", ret); + if (ret) goto err_cpufreq; - } ret = s3c2410wdt_mask_and_disable_reset(wdt, false); if (ret < 0) diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c index bfa035e1a75e..cbd8c957182f 100644 --- a/drivers/watchdog/sa1100_wdt.c +++ b/drivers/watchdog/sa1100_wdt.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for the SA11x0/PXA2xx * * (c) Copyright 2000 Oleg Drokin <green@crimea.edu> * Based on SoftDog driver by Alan Cox <alan@lxorguk.ukuu.org.uk> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Oleg Drokin nor iXcelerator.com admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c index b8da1bf21e12..d193a60430b2 100644 --- a/drivers/watchdog/sama5d4_wdt.c +++ b/drivers/watchdog/sama5d4_wdt.c @@ -110,9 +110,7 @@ static int sama5d4_wdt_set_timeout(struct watchdog_device *wdd, u32 value = WDT_SEC2TICKS(timeout); wdt->mr &= ~AT91_WDT_WDV; - wdt->mr &= ~AT91_WDT_WDD; wdt->mr |= AT91_WDT_SET_WDV(value); - wdt->mr |= AT91_WDT_SET_WDD(value); /* * WDDIS has to be 0 when updating WDD/WDV. The datasheet states: When @@ -248,7 +246,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev) timeout = WDT_SEC2TICKS(wdd->timeout); - wdt->mr |= AT91_WDT_SET_WDD(timeout); + wdt->mr |= AT91_WDT_SET_WDD(WDT_SEC2TICKS(MAX_WDT_TIMEOUT)); wdt->mr |= AT91_WDT_SET_WDV(timeout); ret = sama5d4_wdt_init(wdt); @@ -259,10 +257,8 @@ static int sama5d4_wdt_probe(struct platform_device *pdev) watchdog_stop_on_unregister(wdd); ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "failed to register watchdog device\n"); + if (ret) return ret; - } platform_set_drvdata(pdev, wdt); @@ -279,7 +275,17 @@ static const struct of_device_id sama5d4_wdt_of_match[] = { MODULE_DEVICE_TABLE(of, sama5d4_wdt_of_match); #ifdef CONFIG_PM_SLEEP -static int sama5d4_wdt_resume(struct device *dev) +static int sama5d4_wdt_suspend_late(struct device *dev) +{ + struct sama5d4_wdt *wdt = dev_get_drvdata(dev); + + if (watchdog_active(&wdt->wdd)) + sama5d4_wdt_stop(&wdt->wdd); + + return 0; +} + +static int sama5d4_wdt_resume_early(struct device *dev) { struct sama5d4_wdt *wdt = dev_get_drvdata(dev); @@ -290,12 +296,17 @@ static int sama5d4_wdt_resume(struct device *dev) */ sama5d4_wdt_init(wdt); + if (watchdog_active(&wdt->wdd)) + sama5d4_wdt_start(&wdt->wdd); + return 0; } #endif -static SIMPLE_DEV_PM_OPS(sama5d4_wdt_pm_ops, NULL, - sama5d4_wdt_resume); +static const struct dev_pm_ops sama5d4_wdt_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(sama5d4_wdt_suspend_late, + sama5d4_wdt_resume_early) +}; static struct platform_driver sama5d4_wdt_driver = { .probe = sama5d4_wdt_probe, diff --git a/drivers/watchdog/sbc7240_wdt.c b/drivers/watchdog/sbc7240_wdt.c index efc81b318939..12cdee7d5069 100644 --- a/drivers/watchdog/sbc7240_wdt.c +++ b/drivers/watchdog/sbc7240_wdt.c @@ -1,19 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * NANO7240 SBC Watchdog device driver * * Based on w83877f.c by Scott Jennings, * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation; - * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or - * implied. See the License for the specific language governing - * rights and limitations under the License. - * * (c) Copyright 2007 Gilles GIGAN <gilles.gigan@jcu.edu.au> - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/sbc8360.c b/drivers/watchdog/sbc8360.c index 3396024e7b76..4f8b9912fc51 100644 --- a/drivers/watchdog/sbc8360.c +++ b/drivers/watchdog/sbc8360.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * SBC8360 Watchdog driver * @@ -19,11 +20,6 @@ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/sch311x_wdt.c b/drivers/watchdog/sch311x_wdt.c index ed6e9fac5d74..3612f1df381b 100644 --- a/drivers/watchdog/sch311x_wdt.c +++ b/drivers/watchdog/sch311x_wdt.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * sch311x_wdt.c - Driver for the SCH311x Super-I/O chips * integrated watchdog. * * (c) Copyright 2008 Wim Van Sebroeck <wim@iguana.be>. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. diff --git a/drivers/watchdog/smsc37b787_wdt.c b/drivers/watchdog/smsc37b787_wdt.c index 13c817ea1d6a..f5713030d0f7 100644 --- a/drivers/watchdog/smsc37b787_wdt.c +++ b/drivers/watchdog/smsc37b787_wdt.c @@ -36,7 +36,7 @@ * mknod /dev/watchdog c 10 130 * * For an example userspace keep-alive daemon, see: - * Documentation/watchdog/wdt.txt + * Documentation/watchdog/wdt.rst */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/softdog.c b/drivers/watchdog/softdog.c index 060740625485..3e4885c1545e 100644 --- a/drivers/watchdog/softdog.c +++ b/drivers/watchdog/softdog.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * SoftDog: A Software Watchdog Device * * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c index cd4430ff9b1c..93bd302ae7c5 100644 --- a/drivers/watchdog/sp5100_tco.c +++ b/drivers/watchdog/sp5100_tco.c @@ -402,10 +402,8 @@ static int sp5100_tco_probe(struct platform_device *pdev) return ret; ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "cannot register watchdog device (err=%d)\n", ret); + if (ret) return ret; - } /* Show module parameters */ dev_info(dev, "initialized. heartbeat=%d sec (nowayout=%d)\n", diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c index 072986d461b7..53e04926a7b2 100644 --- a/drivers/watchdog/sp805_wdt.c +++ b/drivers/watchdog/sp805_wdt.c @@ -288,11 +288,8 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id) } ret = watchdog_register_device(&wdt->wdd); - if (ret) { - dev_err(&adev->dev, "watchdog_register_device() failed: %d\n", - ret); + if (ret) goto err; - } amba_set_drvdata(adev, wdt); dev_info(&adev->dev, "registration successful\n"); diff --git a/drivers/watchdog/sprd_wdt.c b/drivers/watchdog/sprd_wdt.c index 916fb3f96bdc..edba4e278685 100644 --- a/drivers/watchdog/sprd_wdt.c +++ b/drivers/watchdog/sprd_wdt.c @@ -320,7 +320,6 @@ static int sprd_wdt_probe(struct platform_device *pdev) ret = devm_watchdog_register_device(dev, &wdt->wdd); if (ret) { sprd_wdt_disable(wdt); - dev_err(dev, "failed to register watchdog\n"); return ret; } platform_set_drvdata(pdev, wdt); diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c index 7a90184eb950..14ab6559c748 100644 --- a/drivers/watchdog/st_lpc_wdt.c +++ b/drivers/watchdog/st_lpc_wdt.c @@ -228,10 +228,8 @@ static int st_wdog_probe(struct platform_device *pdev) return ret; ret = devm_watchdog_register_device(dev, &st_wdog_dev); - if (ret) { - dev_err(dev, "Unable to register watchdog\n"); + if (ret) return ret; - } st_wdog_setup(st_wdog, true); diff --git a/drivers/watchdog/stm32_iwdg.c b/drivers/watchdog/stm32_iwdg.c index d569a3634d9b..a3a329011a06 100644 --- a/drivers/watchdog/stm32_iwdg.c +++ b/drivers/watchdog/stm32_iwdg.c @@ -263,10 +263,8 @@ static int stm32_iwdg_probe(struct platform_device *pdev) watchdog_init_timeout(wdd, 0, dev); ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "failed to register watchdog device\n"); + if (ret) return ret; - } platform_set_drvdata(pdev, wdt); diff --git a/drivers/watchdog/stmp3xxx_rtc_wdt.c b/drivers/watchdog/stmp3xxx_rtc_wdt.c index 671f4ba7b4ed..7caf3aa71c6a 100644 --- a/drivers/watchdog/stmp3xxx_rtc_wdt.c +++ b/drivers/watchdog/stmp3xxx_rtc_wdt.c @@ -98,10 +98,8 @@ static int stmp3xxx_wdt_probe(struct platform_device *pdev) stmp3xxx_wdd.parent = dev; ret = devm_watchdog_register_device(dev, &stmp3xxx_wdd); - if (ret < 0) { - dev_err(dev, "cannot register watchdog device\n"); + if (ret < 0) return ret; - } if (register_reboot_notifier(&wdt_notifier)) dev_warn(dev, "cannot register reboot notifier\n"); diff --git a/drivers/watchdog/tegra_wdt.c b/drivers/watchdog/tegra_wdt.c index a58b000acc4f..dfe06e506cad 100644 --- a/drivers/watchdog/tegra_wdt.c +++ b/drivers/watchdog/tegra_wdt.c @@ -219,10 +219,8 @@ static int tegra_wdt_probe(struct platform_device *pdev) watchdog_stop_on_unregister(wdd); ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "failed to register watchdog device\n"); + if (ret) return ret; - } platform_set_drvdata(pdev, wdt); diff --git a/drivers/watchdog/ts4800_wdt.c b/drivers/watchdog/ts4800_wdt.c index 9dc6d7f45806..c137ad2bd5c3 100644 --- a/drivers/watchdog/ts4800_wdt.c +++ b/drivers/watchdog/ts4800_wdt.c @@ -171,10 +171,8 @@ static int ts4800_wdt_probe(struct platform_device *pdev) ts4800_wdt_stop(wdd); ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "failed to register watchdog device\n"); + if (ret) return ret; - } platform_set_drvdata(pdev, wdt); diff --git a/drivers/watchdog/txx9wdt.c b/drivers/watchdog/txx9wdt.c index fcb4da5b1f4c..89a54b6645bd 100644 --- a/drivers/watchdog/txx9wdt.c +++ b/drivers/watchdog/txx9wdt.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * txx9wdt: A Hardware Watchdog Driver for TXx9 SoCs * * Copyright (C) 2007 Atsushi Nemoto <anemo@mba.ocn.ne.jp> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c index 3a49ba9ea608..38b31e9947aa 100644 --- a/drivers/watchdog/w83627hf_wdt.c +++ b/drivers/watchdog/w83627hf_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * w83627hf/thf WDT driver * @@ -17,11 +18,6 @@ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/wafer5823wdt.c b/drivers/watchdog/wafer5823wdt.c index 0a8073b419f8..6d2071a0590d 100644 --- a/drivers/watchdog/wafer5823wdt.c +++ b/drivers/watchdog/wafer5823wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * ICP Wafer 5823 Single Board Computer WDT driver * http://www.icpamerica.com/wafer_5823.php @@ -13,11 +14,6 @@ * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c index 62be9e52a4de..21e8085b848b 100644 --- a/drivers/watchdog/watchdog_core.c +++ b/drivers/watchdog/watchdog_core.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * watchdog_core.c * @@ -16,11 +17,6 @@ * Satyam Sharma <satyam@infradead.org> * Randy Dunlap <randy.dunlap@oracle.com> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw. * admit liability nor provide warranty for any of this software. * This material is provided "AS-IS" and at no charge. @@ -60,11 +56,10 @@ static DEFINE_MUTEX(wtd_deferred_reg_mutex); static LIST_HEAD(wtd_deferred_reg_list); static bool wtd_deferred_reg_done; -static int watchdog_deferred_registration_add(struct watchdog_device *wdd) +static void watchdog_deferred_registration_add(struct watchdog_device *wdd) { list_add_tail(&wdd->deferred, &wtd_deferred_reg_list); - return 0; } static void watchdog_deferred_registration_del(struct watchdog_device *wdd) @@ -265,14 +260,23 @@ static int __watchdog_register_device(struct watchdog_device *wdd) int watchdog_register_device(struct watchdog_device *wdd) { - int ret; + const char *dev_str; + int ret = 0; mutex_lock(&wtd_deferred_reg_mutex); if (wtd_deferred_reg_done) ret = __watchdog_register_device(wdd); else - ret = watchdog_deferred_registration_add(wdd); + watchdog_deferred_registration_add(wdd); mutex_unlock(&wtd_deferred_reg_mutex); + + if (ret) { + dev_str = wdd->parent ? dev_name(wdd->parent) : + (const char *)wdd->info->identity; + pr_err("%s: failed to register watchdog device (err = %d)\n", + dev_str, ret); + } + return ret; } EXPORT_SYMBOL_GPL(watchdog_register_device); diff --git a/drivers/watchdog/watchdog_core.h b/drivers/watchdog/watchdog_core.h index 86ff962d1e15..a5062e8e0d13 100644 --- a/drivers/watchdog/watchdog_core.h +++ b/drivers/watchdog/watchdog_core.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * watchdog_core.h * @@ -16,11 +17,6 @@ * Satyam Sharma <satyam@infradead.org> * Randy Dunlap <randy.dunlap@oracle.com> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw. * admit liability nor provide warranty for any of this software. * This material is provided "AS-IS" and at no charge. diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 252a7c7b6592..dbd2ad4c9294 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * watchdog_dev.c * @@ -20,11 +21,6 @@ * Satyam Sharma <satyam@infradead.org> * Randy Dunlap <randy.dunlap@oracle.com> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw. * admit liability nor provide warranty for any of this software. * This material is provided "AS-IS" and at no charge. @@ -69,6 +65,7 @@ struct watchdog_core_data { struct mutex lock; ktime_t last_keepalive; ktime_t last_hw_keepalive; + ktime_t open_deadline; struct hrtimer timer; struct kthread_work work; unsigned long status; /* Internal status bits */ @@ -87,6 +84,19 @@ static struct kthread_worker *watchdog_kworker; static bool handle_boot_enabled = IS_ENABLED(CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED); +static unsigned open_timeout = CONFIG_WATCHDOG_OPEN_TIMEOUT; + +static bool watchdog_past_open_deadline(struct watchdog_core_data *data) +{ + return ktime_after(ktime_get(), data->open_deadline); +} + +static void watchdog_set_open_deadline(struct watchdog_core_data *data) +{ + data->open_deadline = open_timeout ? + ktime_get() + ktime_set(open_timeout, 0) : KTIME_MAX; +} + static inline bool watchdog_need_worker(struct watchdog_device *wdd) { /* All variables in milli-seconds */ @@ -119,14 +129,15 @@ static ktime_t watchdog_next_keepalive(struct watchdog_device *wdd) ktime_t virt_timeout; unsigned int hw_heartbeat_ms; - virt_timeout = ktime_add(wd_data->last_keepalive, - ms_to_ktime(timeout_ms)); + if (watchdog_active(wdd)) + virt_timeout = ktime_add(wd_data->last_keepalive, + ms_to_ktime(timeout_ms)); + else + virt_timeout = wd_data->open_deadline; + hw_heartbeat_ms = min_not_zero(timeout_ms, wdd->max_hw_heartbeat_ms); keepalive_interval = ms_to_ktime(hw_heartbeat_ms / 2); - if (!watchdog_active(wdd)) - return keepalive_interval; - /* * To ensure that the watchdog times out wdd->timeout seconds * after the most recent ping from userspace, the last @@ -211,7 +222,13 @@ static bool watchdog_worker_should_ping(struct watchdog_core_data *wd_data) { struct watchdog_device *wdd = wd_data->wdd; - return wdd && (watchdog_active(wdd) || watchdog_hw_running(wdd)); + if (!wdd) + return false; + + if (watchdog_active(wdd)) + return true; + + return watchdog_hw_running(wdd) && !watchdog_past_open_deadline(wd_data); } static void watchdog_ping_work(struct kthread_work *work) @@ -824,6 +841,15 @@ static int watchdog_open(struct inode *inode, struct file *file) if (!hw_running) kref_get(&wd_data->kref); + /* + * open_timeout only applies for the first open from + * userspace. Set open_deadline to infinity so that the kernel + * will take care of an always-running hardware watchdog in + * case the device gets magic-closed or WDIOS_DISABLECARD is + * applied. + */ + wd_data->open_deadline = KTIME_MAX; + /* dev/watchdog is a virtual (and thus non-seekable) filesystem */ return stream_open(inode, file); @@ -983,6 +1009,7 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno) /* Record time of most recent heartbeat as 'just before now'. */ wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1); + watchdog_set_open_deadline(wd_data); /* * If the watchdog is running, prevent its driver from being unloaded, @@ -1181,3 +1208,8 @@ module_param(handle_boot_enabled, bool, 0444); MODULE_PARM_DESC(handle_boot_enabled, "Watchdog core auto-updates boot enabled watchdogs before userspace takes over (default=" __MODULE_STRING(IS_ENABLED(CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED)) ")"); + +module_param(open_timeout, uint, 0644); +MODULE_PARM_DESC(open_timeout, + "Maximum time (in seconds, 0 means infinity) for userspace to take over a running watchdog (default=" + __MODULE_STRING(CONFIG_WATCHDOG_OPEN_TIMEOUT) ")"); diff --git a/drivers/watchdog/wd501p.h b/drivers/watchdog/wd501p.h index 0e3a497d5626..43a4d88fd363 100644 --- a/drivers/watchdog/wd501p.h +++ b/drivers/watchdog/wd501p.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-1.0+ */ /* * Industrial Computer Source WDT500/501 driver * @@ -11,12 +12,7 @@ * * http://www.cymru.net * - * This driver is provided under the GNU General Public License, - * incorporated herein by reference. The driver is provided without - * warranty or support. - * * Release 0.04. - * */ diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index 430ee4e9b185..e7cf41aa26c3 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * ACPI Hardware Watchdog (WDAT) driver. * * Copyright (C) 2016, Intel Corporation * Author: Mika Westerberg <mika.westerberg@linux.intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/acpi.h> diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c index 3d2f5ed60e88..0650100fad00 100644 --- a/drivers/watchdog/wdt.c +++ b/drivers/watchdog/wdt.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Industrial Computer Source WDT501 driver * * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/wdt_pci.c b/drivers/watchdog/wdt_pci.c index ff3a41f47127..66303ab95685 100644 --- a/drivers/watchdog/wdt_pci.c +++ b/drivers/watchdog/wdt_pci.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Industrial Computer Source PCI-WDT500/501 driver * * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/wm831x_wdt.c b/drivers/watchdog/wm831x_wdt.c index 9b6565a3fab4..030ce240620d 100644 --- a/drivers/watchdog/wm831x_wdt.c +++ b/drivers/watchdog/wm831x_wdt.c @@ -267,14 +267,7 @@ static int wm831x_wdt_probe(struct platform_device *pdev) } } - ret = devm_watchdog_register_device(dev, &driver_data->wdt); - if (ret != 0) { - dev_err(wm831x->dev, "watchdog_register_device() failed: %d\n", - ret); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, &driver_data->wdt); } static struct platform_driver wm831x_wdt_driver = { diff --git a/drivers/watchdog/xen_wdt.c b/drivers/watchdog/xen_wdt.c index 2ba0a3c4523c..b343f421dc72 100644 --- a/drivers/watchdog/xen_wdt.c +++ b/drivers/watchdog/xen_wdt.c @@ -138,10 +138,8 @@ static int xen_wdt_probe(struct platform_device *pdev) watchdog_stop_on_unregister(&xen_wdt_dev); ret = devm_watchdog_register_device(dev, &xen_wdt_dev); - if (ret) { - dev_err(dev, "cannot register watchdog device (%d)\n", ret); + if (ret) return ret; - } dev_info(dev, "initialized (timeout=%ds, nowayout=%d)\n", xen_wdt_dev.timeout, nowayout); |