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authorRichard Purdie <rpurdie@rpsys.net>2007-11-10 13:29:04 +0000
committerRichard Purdie <rpurdie@rpsys.net>2007-12-07 09:06:53 +0000
commitdc47206e552c0850ad11f7e9a1fca0a3c92f5d65 (patch)
tree01188f5ca89d295009a618e1be6c5cea2926a522 /drivers/leds/led-class.c
parentf194d132e4971111f85c18c96067acffb13cee6d (diff)
downloadlinux-dc47206e552c0850ad11f7e9a1fca0a3c92f5d65.tar.bz2
leds: Fix led trigger locking bugs
Convert part of the led trigger core from rw spinlocks to rw semaphores. We're calling functions which can sleep from invalid contexts otherwise. Fixes bug #9264. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Diffstat (limited to 'drivers/leds/led-class.c')
-rw-r--r--drivers/leds/led-class.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 4211293ce862..ba8b04b03b9f 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -111,7 +111,7 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
write_unlock(&leds_list_lock);
#ifdef CONFIG_LEDS_TRIGGERS
- rwlock_init(&led_cdev->trigger_lock);
+ init_rwsem(&led_cdev->trigger_lock);
rc = device_create_file(led_cdev->dev, &dev_attr_trigger);
if (rc)
@@ -147,10 +147,10 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
device_remove_file(led_cdev->dev, &dev_attr_brightness);
#ifdef CONFIG_LEDS_TRIGGERS
device_remove_file(led_cdev->dev, &dev_attr_trigger);
- write_lock(&led_cdev->trigger_lock);
+ down_write(&led_cdev->trigger_lock);
if (led_cdev->trigger)
led_trigger_set(led_cdev, NULL);
- write_unlock(&led_cdev->trigger_lock);
+ up_write(&led_cdev->trigger_lock);
#endif
device_unregister(led_cdev->dev);