diff options
| author |   Guenter Roeck <linux@roeck-us.net> | 2017-12-24 13:04:09 -0800 |
|---|---|---|
| committer |   Wim Van Sebroeck <wim@iguana.be> | 2018-01-21 12:56:35 +0100 |
| commit | 23dfe140057baa165daebadf8f4600e3603e0954 (patch) | |
| tree | 29e03b50c52ff826d1e64b931ab360c3e2f375ce /drivers/watchdog/sp5100_tco.c | |
| parent | watchdog: sp5100_tco: Use request_muxed_region where possible (diff) | |
| download | linux-dev-23dfe140057baa165daebadf8f4600e3603e0954.tar.xz linux-dev-23dfe140057baa165daebadf8f4600e3603e0954.zip | |
watchdog: sp5100_tco: Use standard error codes
By using standard error codes, we can identify and return more than one
error condition.
Cc: Zoltán Böszörményi <zboszor@pr.hu>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/sp5100_tco.c')
| -rw-r--r-- | drivers/watchdog/sp5100_tco.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c index 11109ac959e2..0e816f2cdb07 100644 --- a/drivers/watchdog/sp5100_tco.c +++ b/drivers/watchdog/sp5100_tco.c @@ -345,12 +345,13 @@ static u8 sp5100_tco_read_pm_reg32(u8 index) /* * Init & exit routines */ -static unsigned char sp5100_tco_setupdevice(void) +static int sp5100_tco_setupdevice(void) { struct pci_dev *dev = NULL; const char *dev_name = NULL; u32 val; u8 base_addr; + int ret; /* Match the PCI device */ for_each_pci_dev(dev) { @@ -361,7 +362,7 @@ static unsigned char sp5100_tco_setupdevice(void) } if (!sp5100_tco_pci) - return 0; + return -ENODEV; pr_info("PCI Vendor ID: 0x%x, Device ID: 0x%x, Revision ID: 0x%x\n", sp5100_tco_pci->vendor, sp5100_tco_pci->device, @@ -383,7 +384,7 @@ static unsigned char sp5100_tco_setupdevice(void) SP5100_PM_IOPORTS_SIZE, dev_name)) { pr_err("I/O address 0x%04x already in use\n", SP5100_IO_PM_INDEX_REG); - goto exit; + return -EBUSY; } /* @@ -433,6 +434,7 @@ static unsigned char sp5100_tco_setupdevice(void) pr_debug("SBResource_MMIO is disabled(0x%04x)\n", val); pr_notice("failed to find MMIO address, giving up.\n"); + ret = -ENODEV; goto unreg_region; setup_wdt: @@ -441,6 +443,7 @@ setup_wdt: tcobase = ioremap(val, SP5100_WDT_MEM_MAP_SIZE); if (!tcobase) { pr_err("failed to get tcobase address\n"); + ret = -ENOMEM; goto unreg_mem_region; } @@ -470,14 +473,13 @@ setup_wdt: release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE); /* Done */ - return 1; + return 0; unreg_mem_region: release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); unreg_region: release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE); -exit: - return 0; + return ret; } static int sp5100_tco_init(struct platform_device *dev) @@ -488,8 +490,9 @@ static int sp5100_tco_init(struct platform_device *dev) * Check whether or not the hardware watchdog is there. If found, then * set it up. */ - if (!sp5100_tco_setupdevice()) - return -ENODEV; + ret = sp5100_tco_setupdevice(); + if (ret) + return ret; /* Check to see if last reboot was due to watchdog timeout */ pr_info("Last reboot was %striggered by watchdog.\n", |