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| author | Hans de Goede <hdegoede@redhat.com> | 2016-11-08 14:38:46 +0100 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-11-22 12:07:05 +0100 |
| commit | a9c6ce57ec2f136d08141e8220a0ffaca216f7b0 (patch) | |
| tree | f7a577053e7c3453ae8939d87b903dde4754b2e7 /drivers/leds/led-class.c | |
| parent | 8338eab50ffb3399a938d723f9605383ed9f8473 (diff) | |
| download | linux-a9c6ce57ec2f136d08141e8220a0ffaca216f7b0.tar.gz linux-a9c6ce57ec2f136d08141e8220a0ffaca216f7b0.tar.bz2 linux-a9c6ce57ec2f136d08141e8220a0ffaca216f7b0.zip | |
led: core: Use atomic bit-field for the blink-flags
All the LED_BLINK* flags are accessed read-modify-write from e.g.
led_set_brightness and led_blink_set_oneshot while both
set_brightness_work and the blink_timer may be running.
If these race then the modify step done by one of them may be lost,
switch the LED_BLINK* flags to a new atomic work_flags bit-field
to avoid this race.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Diffstat (limited to 'drivers/leds/led-class.c')
| -rw-r--r-- | drivers/leds/led-class.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index d946eb166781..326ee6e925a2 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -204,6 +204,7 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev) dev_warn(parent, "Led %s renamed to %s due to name collision", led_cdev->name, dev_name(led_cdev->dev)); + led_cdev->work_flags = 0; #ifdef CONFIG_LEDS_TRIGGERS init_rwsem(&led_cdev->trigger_lock); #endif |