diff options
author | Richard Purdie <rpurdie@rpsys.net> | 2007-02-09 01:53:55 +0300 |
---|---|---|
committer | Richard Purdie <rpurdie@rpsys.net> | 2007-02-20 11:38:45 +0300 |
commit | 249040dc7fd391186f420fe23a9b59d357103cac (patch) | |
tree | fa62127c1a66e752ff5f32aa53c3d986022e0851 /drivers/video/backlight/backlight.c | |
parent | 28ee086d5b36aab2931f6740e409bb0fb6c65e5f (diff) | |
download | linux-249040dc7fd391186f420fe23a9b59d357103cac.tar.xz |
backlight: Convert semaphore -> mutex
Convert internal semaphore to a mutex
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Diffstat (limited to 'drivers/video/backlight/backlight.c')
-rw-r--r-- | drivers/video/backlight/backlight.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index 347081daf7a4..4f987c40b72d 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -32,14 +32,14 @@ static int fb_notifier_callback(struct notifier_block *self, return 0; bd = container_of(self, struct backlight_device, fb_notif); - down(&bd->sem); + mutex_lock(&bd->props_lock); if (bd->props) if (!bd->props->check_fb || bd->props->check_fb(evdata->info)) { bd->props->fb_blank = *(int *)evdata->data; backlight_update_status(bd); } - up(&bd->sem); + mutex_unlock(&bd->props_lock); return 0; } @@ -71,10 +71,10 @@ static ssize_t backlight_show_power(struct class_device *cdev, char *buf) int rc = -ENXIO; struct backlight_device *bd = to_backlight_device(cdev); - down(&bd->sem); + mutex_lock(&bd->props_lock); if (bd->props) rc = sprintf(buf, "%d\n", bd->props->power); - up(&bd->sem); + mutex_unlock(&bd->props_lock); return rc; } @@ -92,14 +92,14 @@ static ssize_t backlight_store_power(struct class_device *cdev, const char *buf, if (size != count) return -EINVAL; - down(&bd->sem); + mutex_lock(&bd->props_lock); if (bd->props) { pr_debug("backlight: set power to %d\n", power); bd->props->power = power; backlight_update_status(bd); rc = count; } - up(&bd->sem); + mutex_unlock(&bd->props_lock); return rc; } @@ -109,10 +109,10 @@ static ssize_t backlight_show_brightness(struct class_device *cdev, char *buf) int rc = -ENXIO; struct backlight_device *bd = to_backlight_device(cdev); - down(&bd->sem); + mutex_lock(&bd->props_lock); if (bd->props) rc = sprintf(buf, "%d\n", bd->props->brightness); - up(&bd->sem); + mutex_unlock(&bd->props_lock); return rc; } @@ -130,7 +130,7 @@ static ssize_t backlight_store_brightness(struct class_device *cdev, const char if (size != count) return -EINVAL; - down(&bd->sem); + mutex_lock(&bd->props_lock); if (bd->props) { if (brightness > bd->props->max_brightness) rc = -EINVAL; @@ -142,7 +142,7 @@ static ssize_t backlight_store_brightness(struct class_device *cdev, const char rc = count; } } - up(&bd->sem); + mutex_unlock(&bd->props_lock); return rc; } @@ -152,10 +152,10 @@ static ssize_t backlight_show_max_brightness(struct class_device *cdev, char *bu int rc = -ENXIO; struct backlight_device *bd = to_backlight_device(cdev); - down(&bd->sem); + mutex_lock(&bd->props_lock); if (bd->props) rc = sprintf(buf, "%d\n", bd->props->max_brightness); - up(&bd->sem); + mutex_unlock(&bd->props_lock); return rc; } @@ -166,10 +166,10 @@ static ssize_t backlight_show_actual_brightness(struct class_device *cdev, int rc = -ENXIO; struct backlight_device *bd = to_backlight_device(cdev); - down(&bd->sem); + mutex_lock(&bd->props_lock); if (bd->props && bd->props->get_brightness) rc = sprintf(buf, "%d\n", bd->props->get_brightness(bd)); - up(&bd->sem); + mutex_unlock(&bd->props_lock); return rc; } @@ -228,7 +228,7 @@ struct backlight_device *backlight_device_register(const char *name, return ERR_PTR(-ENOMEM); mutex_init(&new_bd->update_lock); - init_MUTEX(&new_bd->sem); + mutex_init(&new_bd->props_lock); new_bd->props = bp; memset(&new_bd->class_dev, 0, sizeof(new_bd->class_dev)); new_bd->class_dev.class = &backlight_class; @@ -285,9 +285,9 @@ void backlight_device_unregister(struct backlight_device *bd) class_device_remove_file(&bd->class_dev, &bl_class_device_attributes[i]); - down(&bd->sem); + mutex_lock(&bd->props_lock); bd->props = NULL; - up(&bd->sem); + mutex_unlock(&bd->props_lock); backlight_unregister_fb(bd); |