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2020-07-20backlight: backlight: Improve backlight_properties documentationSam Ravnborg1-11/+85
Improve the documentation for backlight_properties and adapt it to kernel-doc style. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-20backlight: backlight: Improve backlight_ops documentationSam Ravnborg1-6/+53
Improve the documentation for backlight_ops and adapt it to kernel-doc style. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-20backlight: backlight: Add backlight_is_blank()Sam Ravnborg1-0/+19
The backlight support has three properties that express the state: - power - state - fb_blank It is un-documented and easy to get wrong. Add backlight_is_blank() helper to make it simpler for drivers to get the check of the state correct. A lot of drivers also includes checks for fb_blank. This check is redundant when the state is checked and thus not needed in this helper function. But added anyway to avoid introducing subtle bugs due to the creative use of fb_blank in some drivers. Introducing this helper will for some drivers results in added support for fb_blank. This will be a change in functionality, which will improve the backlight driver. Rolling out this helper to all relevant backlight drivers will eliminate almost all accesses to fb_blank. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-20backlight: backlight: Refactor fb_notifier_callback()Sam Ravnborg1-21/+22
Increase readability of fb_notifier_callback() by removing a few indent levels. No functional change. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-08video: backlight: sky81452-backlight: Fix some kerneldoc issuesLee Jones1-3/+3
Firstly, all lines must begin with a '*'. Secondly, arg descriptions must be spelt correctly, so fix misspelling of 'gpioD_enable' and 'short_detecTion_threshold' Fixes the following W=1 kernel build warning(s): drivers/video/backlight/sky81452-backlight.c:46: warning: bad line: If it is not defined, default name is lcd-backlight. drivers/video/backlight/sky81452-backlight.c:64: warning: Function parameter or member 'gpiod_enable' not described in 'sky81452_bl_platform_data' drivers/video/backlight/sky81452-backlight.c:64: warning: Function parameter or member 'short_detection_threshold' not described in 'sky81452_bl_platform_data' Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: qcom-wled: Remove unused configs for LED3 and LED4Lee Jones1-8/+0
Fixes W=1 warnings: drivers/video/backlight/qcom-wled.c:1294:34: warning: ‘wled4_string_cfg’ defined but not used [-Wunused-const-variable=] 1294 | static const struct wled_var_cfg wled4_string_cfg = { | ^~~~~~~~~~~~~~~~ drivers/video/backlight/qcom-wled.c:1290:34: warning: ‘wled3_string_cfg’ defined but not used [-Wunused-const-variable=] 1290 | static const struct wled_var_cfg wled3_string_cfg = { | ^~~~~~~~~~~~~~~~ Cc: Andy Gross <agross@kernel.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: linux-arm-msm@vger.kernel.org Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: lm3630a_bl: Remove invalid checks for unsigned int < 0Lee Jones1-2/+2
unsigned ints 'sources' and 'bank' cannot be less than LM3630A_SINK_0 (0) and LM3630A_BANK_0 (0) respecitively, so change the logic to only check for thier two possible valid values. Fixes W=1 warnings: drivers/video/backlight/lm3630a_bl.c: In function ‘lm3630a_parse_led_sources’: drivers/video/backlight/lm3630a_bl.c:394:18: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits] 394 | if (sources[i] < LM3630A_SINK_0 || sources[i] > LM3630A_SINK_1) | ^ drivers/video/backlight/lm3630a_bl.c: In function ‘lm3630a_parse_bank’: drivers/video/backlight/lm3630a_bl.c:415:11: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits] 415 | if (bank < LM3630A_BANK_0 || bank > LM3630A_BANK_1) | ^ Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Daniel Jeong <gshark.jeong@gmail.com> Cc: LDD MLP <ldd-mlp@list.ti.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: backlight: Supply description for function args in existing KerneldocsLee Jones1-0/+2
Kerneldoc syntax is used, but not complete. Descriptions required. Prevents warnings like: drivers/video/backlight/backlight.c:329: warning: Function parameter or member 'reason' not described in 'backlight_force_update' drivers/video/backlight/backlight.c:354: warning: Function parameter or member 'props' not described in 'backlight_device_register' Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Jamey Hicks <jamey.hicks@hp.com> Cc: Andrew Zabolotny <zap@homelink.ru> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: ili922x: Add missing kerneldoc description for ili922x_reg_dump()'s argLee Jones1-0/+2
Kerneldoc syntax is used, but not complete. Descriptions required. Prevents warnings like: drivers/video/backlight/ili922x.c:298: warning: Function parameter or member 'spi' not described in 'ili922x_reg_dump' Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Software Engineering <sbabic@denx.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: ili922x: Remove invalid use of kerneldoc syntaxLee Jones1-2/+2
Kerneldoc is for documenting function arguments and return values. Prevents warnings like: drivers/video/backlight/ili922x.c:127: warning: cannot understand function prototype: 'int ili922x_id = 1; ' drivers/video/backlight/ili922x.c:136: warning: cannot understand function prototype: 'struct ili922x ' Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Software Engineering <sbabic@denx.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: ili922x: Add missing kerneldoc descriptions for CHECK_FREQ_REG() argsLee Jones1-0/+2
Kerneldoc syntax is used, but not complete. Descriptions required. Prevents warnings like: drivers/video/backlight/ili922x.c:116: warning: Function parameter or member 's' not described in 'CHECK_FREQ_REG' drivers/video/backlight/ili922x.c:116: warning: Function parameter or member 'x' not described in 'CHECK_FREQ_REG' Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Software Engineering <sbabic@denx.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: lcd: Add missing kerneldoc entry for 'struct device parent'Lee Jones1-0/+1
This has been missing since the conversion to 'struct device' in 2007. Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Jamey Hicks <jamey.hicks@hp.com> Cc: Andrew Zabolotny <zap@homelink.ru> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-06backlight: lms501kf03: Remove unused const variablesLee Jones1-8/+0
W=1 kernel build reports: drivers/video/backlight/lms501kf03.c:96:28: warning: ‘seq_sleep_in’ defined but not used [-Wunused-const-variable=] 96 | static const unsigned char seq_sleep_in[] = { | ^~~~~~~~~~~~ drivers/video/backlight/lms501kf03.c:92:28: warning: ‘seq_up_dn’ defined but not used [-Wunused-const-variable=] 92 | static const unsigned char seq_up_dn[] = { | ^~~~~~~~~ Either 'seq_sleep_in' nor 'seq_up_dn' have been used since the driver first landed in 2013. Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-01backlight: lms501kf03: Drop unused includeLinus Walleij1-1/+0
This driver includes <linux/gpio.h> but does not use any symbols from that file, drop the include. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-01backlight: Delete the OT200 backlight driverLinus Walleij3-170/+0
This driver has no in-kernel users. The device can only be populated by board files since it does not support device tree nor ACPI, and nothing in the kernel creates a device named "ot200-backlight". This driver has been in the kernel since 2012. If it is used by out-of-tree code that code should have been upstreamed by now, it's been 8 years. It uses the idiomatic forked GPIO of the CS5535 which combines pin control and GPIO into its private custom interface, which causes me a headache because that is not how we do things these days: we creates separate pin control and GPIO drivers. Delete this unused driver. Cc: Christian Gmeiner <christian.gmeiner@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-01backlight: sky81452: Privatize platform dataLinus Walleij4-48/+27
The only way the platform data for the SKY81452 ever gets populated is through the device tree. The MFD device is bothered with this for no reason at all. Just allocate the platform data in the driver and be happy. Cc: Gyungoh Yoo <jack.yoo@skyworksinc.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-07-01backlight: sky81452: Convert to GPIO descriptorsLinus Walleij2-16/+8
The SKY81452 backlight driver just obtains a GPIO (named "gpios" in the device tree) drives it high and leaves it high until the driver is removed. Switch to use GPIO descriptors for this, simple and straight-forward. Cc: Gyungoh Yoo <jack.yoo@skyworksinc.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-06-16backlight: lm3533_bl: Use kobj_to_dev() insteadWang Qing1-1/+1
Use kobj_to_dev() instead of container_of() Signed-off-by: Wang Qing <wangqing@vivo.com> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-06-14Linux 5.8-rc1Linus Torvalds1-2/+2
2020-06-14security: Add LSM hooks to set*gid syscallsThomas Cedeno5-1/+40
The SafeSetID LSM uses the security_task_fix_setuid hook to filter set*uid() syscalls according to its configured security policy. In preparation for adding analagous support in the LSM for set*gid() syscalls, we add the requisite hook here. Tested by putting print statements in the security_task_fix_setgid hook and seeing them get hit during kernel boot. Signed-off-by: Thomas Cedeno <thomascedeno@google.com> Signed-off-by: Micah Morton <mortonm@chromium.org>
2020-06-14Revert "btrfs: switch to iomap_dio_rw() for dio"David Sterba4-166/+169
This reverts commit a43a67a2d715540c1368b9501a22b0373b5874c0. This patch reverts the main part of switching direct io implementation to iomap infrastructure. There's a problem in invalidate page that couldn't be solved as regression in this development cycle. The problem occurs when buffered and direct io are mixed, and the ranges overlap. Although this is not recommended, filesystems implement measures or fallbacks to make it somehow work. In this case, fallback to buffered IO would be an option for btrfs (this already happens when direct io is done on compressed data), but the change would be needed in the iomap code, bringing new semantics to other filesystems. Another problem arises when again the buffered and direct ios are mixed, invalidation fails, then -EIO is set on the mapping and fsync will fail, though there's no real error. There have been discussions how to fix that, but revert seems to be the least intrusive option. Link: https://lore.kernel.org/linux-btrfs/20200528192103.xm45qoxqmkw7i5yl@fiona/ Signed-off-by: David Sterba <dsterba@suse.com>
2020-06-13net: ethernet: ti: ale: fix allmulti for nu type aleGrygorii Strashko1-9/+40
On AM65xx MCU CPSW2G NUSS and 66AK2E/L NUSS allmulti setting does not allow unregistered mcast packets to pass. This happens, because ALE VLAN entries on these SoCs do not contain port masks for reg/unreg mcast packets, but instead store indexes of ALE_VLAN_MASK_MUXx_REG registers which intended for store port masks for reg/unreg mcast packets. This path was missed by commit 9d1f6447274f ("net: ethernet: ti: ale: fix seeing unreg mcast packets with promisc and allmulti disabled"). Hence, fix it by taking into account ALE type in cpsw_ale_set_allmulti(). Fixes: 9d1f6447274f ("net: ethernet: ti: ale: fix seeing unreg mcast packets with promisc and allmulti disabled") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-13net: ethernet: ti: am65-cpsw-nuss: fix ale parameters initGrygorii Strashko1-1/+1
The ALE parameters structure is created on stack, so it has to be reset before passing to cpsw_ale_create() to avoid garbage values. Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-13net: atm: Remove the error message according to the atomic contextLiao Pingfang1-3/+1
Looking into the context (atomic!) and the error message should be dropped. Signed-off-by: Liao Pingfang <liao.pingfang@zte.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>