diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2024-05-31 13:41:21 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2024-05-31 12:57:34 +0100 |
| commit | e1b08c6f5b92d408a9fcc1030a340caeb9852250 (patch) | |
| tree | fc6d15c9f00022e21dc3461f1570edb0d8f6e3b3 /drivers/leds | |
| parent | 75bd07aef47e1a984229e6ec702e8b9aee0226e4 (diff) | |
leds: rgb: leds-ktd202x: Initialize mutex earlier
The mutex must be initialized before the LED class device is registered
otherwise there is a race where it may get used before it is initialized:
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 2 PID: 2045 at kernel/locking/mutex.c:587 __mutex_lock
...
RIP: 0010:__mutex_lock+0x7db/0xc10
...
set_brightness_delayed_set_brightness.part.0+0x17/0x60
set_brightness_delayed+0xf1/0x100
process_one_work+0x222/0x5a0
Move the mutex_init() call earlier to avoid this race condition and
switch to devm_mutex_init() to avoid the need to add error-exit
cleanup to probe() if probe() fails later on.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20240531114124.45346-4-hdegoede@redhat.com
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/rgb/leds-ktd202x.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/leds/rgb/leds-ktd202x.c b/drivers/leds/rgb/leds-ktd202x.c index 60ca6ec34336..d5c442163c46 100644 --- a/drivers/leds/rgb/leds-ktd202x.c +++ b/drivers/leds/rgb/leds-ktd202x.c @@ -556,6 +556,10 @@ static int ktd202x_probe(struct i2c_client *client) return ret; } + ret = devm_mutex_init(dev, &chip->mutex); + if (ret) + return ret; + chip->num_leds = (unsigned long)i2c_get_match_data(client); chip->regulators[0].supply = "vin"; @@ -584,8 +588,6 @@ static int ktd202x_probe(struct i2c_client *client) return ret; } - mutex_init(&chip->mutex); - return 0; } @@ -594,8 +596,6 @@ static void ktd202x_remove(struct i2c_client *client) struct ktd202x *chip = i2c_get_clientdata(client); ktd202x_chip_disable(chip); - - mutex_destroy(&chip->mutex); } static void ktd202x_shutdown(struct i2c_client *client) |