Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH] leds: add hibernation callbacks | Date | Mon, 2 Feb 2015 18:33:06 +0200 |
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From: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Setting a dev_pm_ops suspend/resume pair of callbacks but not a set of hibernation callbacks means those pm functions will not be called upon hibernation - that leads to system crash on ARM during freezing if gpio-led is used in combination with CPU led trigger. It may happen after freeze_noirq stage (GPIO is suspended) and before syscore_suspend stage (CPU led trigger is suspended) - usually when disable_nonboot_cpus() is called.
Fix this by using SIMPLE_DEV_PM_OPS, which appropriately assigns the suspend and hibernation callbacks.
Signed-off-by: Grygorii Strashko <Grygorii.Strashko@linaro.org> --- drivers/leds/led-class.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index f37d63c..4c03808 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -198,10 +198,7 @@ static int led_resume(struct device *dev) return 0; } -static const struct dev_pm_ops leds_class_dev_pm_ops = { - .suspend = led_suspend, - .resume = led_resume, -}; +static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume); /** * led_classdev_register - register a new object of led_classdev class. -- 1.9.1
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