Lothar Waßmann 914ae25a62 leds: trigger: gpio: fix warning in gpio trigger for gpios whose accessor function may sleep ... When using a GPIO driver whose accessor functions may sleep (e.g. an I2C GPIO extender like PCA9554) the following warning is issued: WARNING: CPU: 0 PID: 665 at drivers/gpio/gpiolib.c:2274 gpiod_get_raw_value+0x3c/0x48() Modules linked in: CPU: 0 PID: 665 Comm: kworker/0:2 Not tainted 3.16.0-karo+ #115 Workqueue: events gpio_trig_work [<c00142cc>] (unwind_backtrace) from [<c00118f8>] (show_stack+0x10/0x14) [<c00118f8>] (show_stack) from [<c001bf10>] (warn_slowpath_common+0x64/0x84) [<c001bf10>] (warn_slowpath_common) from [<c001bf4c>] (warn_slowpath_null+0x1c/0x24) [<c001bf4c>] (warn_slowpath_null) from [<c020a1b8>] (gpiod_get_raw_value+0x3c/0x48) [<c020a1b8>] (gpiod_get_raw_value) from [<c02f68a0>] (gpio_trig_work+0x1c/0xb0) [<c02f68a0>] (gpio_trig_work) from [<c0030c1c>] (process_one_work+0x144/0x38c) [<c0030c1c>] (process_one_work) from [<c0030ef8>] (worker_thread+0x60/0x5cc) [<c0030ef8>] (worker_thread) from [<c0036dd4>] (kthread+0xb4/0xd0) [<c0036dd4>] (kthread) from [<c000f0f0>] (ret_from_fork+0x14/0x24) ---[ end trace cd51a1dad8b86c9c ]--- Fix this by using the _cansleep() variant of gpio_get_value(). Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Signed-off-by: Bryan Wu <cooloney@gmail.com>		2014-09-11 16:57:51 -07:00
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Kconfig	leds: add camera LED triggers	2013-04-01 11:04:50 -07:00
ledtrig-backlight.c	leds: trigger: ledtrig-backlight: Fix invalid memory access in fb_event notification callback	2013-08-26 17:46:36 -07:00
ledtrig-camera.c	leds: add camera LED triggers	2013-04-01 11:04:50 -07:00
ledtrig-cpu.c	drivers/leds: Replace __get_cpu_var use through this_cpu_ptr	2014-05-08 14:28:08 +08:00
ledtrig-default-on.c
ledtrig-gpio.c	leds: trigger: gpio: fix warning in gpio trigger for gpios whose accessor function may sleep	2014-09-11 16:57:51 -07:00
ledtrig-heartbeat.c
ledtrig-ide-disk.c
ledtrig-oneshot.c
ledtrig-timer.c
ledtrig-transient.c
Makefile	leds: add camera LED triggers	2013-04-01 11:04:50 -07:00