From 249040dc7fd391186f420fe23a9b59d357103cac Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Thu, 8 Feb 2007 22:53:55 +0000 Subject: backlight: Convert semaphore -> mutex Convert internal semaphore to a mutex Signed-off-by: Richard Purdie --- drivers/video/backlight/lcd.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) (limited to 'drivers/video/backlight/lcd.c') diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c index 1e1e61a4b5d..430ba018a89 100644 --- a/drivers/video/backlight/lcd.c +++ b/drivers/video/backlight/lcd.c @@ -31,11 +31,11 @@ static int fb_notifier_callback(struct notifier_block *self, return 0; ld = container_of(self, struct lcd_device, fb_notif); - down(&ld->sem); + mutex_lock(&ld->props_lock); if (ld->props) if (!ld->props->check_fb || ld->props->check_fb(evdata->info)) ld->props->set_power(ld, *(int *)evdata->data); - up(&ld->sem); + mutex_unlock(&ld->props_lock); return 0; } @@ -66,12 +66,12 @@ static ssize_t lcd_show_power(struct class_device *cdev, char *buf) int rc; struct lcd_device *ld = to_lcd_device(cdev); - down(&ld->sem); + mutex_lock(&ld->props_lock); if (ld->props && ld->props->get_power) rc = sprintf(buf, "%d\n", ld->props->get_power(ld)); else rc = -ENXIO; - up(&ld->sem); + mutex_unlock(&ld->props_lock); return rc; } @@ -89,13 +89,13 @@ static ssize_t lcd_store_power(struct class_device *cdev, const char *buf, size_ if (size != count) return -EINVAL; - down(&ld->sem); + mutex_lock(&ld->props_lock); if (ld->props && ld->props->set_power) { pr_debug("lcd: set power to %d\n", power); ld->props->set_power(ld, power); rc = count; } - up(&ld->sem); + mutex_unlock(&ld->props_lock); return rc; } @@ -105,10 +105,10 @@ static ssize_t lcd_show_contrast(struct class_device *cdev, char *buf) int rc = -ENXIO; struct lcd_device *ld = to_lcd_device(cdev); - down(&ld->sem); + mutex_lock(&ld->props_lock); if (ld->props && ld->props->get_contrast) rc = sprintf(buf, "%d\n", ld->props->get_contrast(ld)); - up(&ld->sem); + mutex_unlock(&ld->props_lock); return rc; } @@ -126,13 +126,13 @@ static ssize_t lcd_store_contrast(struct class_device *cdev, const char *buf, si if (size != count) return -EINVAL; - down(&ld->sem); + mutex_lock(&ld->props_lock); if (ld->props && ld->props->set_contrast) { pr_debug("lcd: set contrast to %d\n", contrast); ld->props->set_contrast(ld, contrast); rc = count; } - up(&ld->sem); + mutex_unlock(&ld->props_lock); return rc; } @@ -142,10 +142,10 @@ static ssize_t lcd_show_max_contrast(struct class_device *cdev, char *buf) int rc = -ENXIO; struct lcd_device *ld = to_lcd_device(cdev); - down(&ld->sem); + mutex_lock(&ld->props_lock); if (ld->props) rc = sprintf(buf, "%d\n", ld->props->max_contrast); - up(&ld->sem); + mutex_unlock(&ld->props_lock); return rc; } @@ -197,7 +197,7 @@ struct lcd_device *lcd_device_register(const char *name, void *devdata, if (!new_ld) return ERR_PTR(-ENOMEM); - init_MUTEX(&new_ld->sem); + mutex_init(&new_ld->props_lock); mutex_init(&new_ld->update_lock); new_ld->props = lp; memset(&new_ld->class_dev, 0, sizeof(new_ld->class_dev)); @@ -253,9 +253,9 @@ void lcd_device_unregister(struct lcd_device *ld) class_device_remove_file(&ld->class_dev, &lcd_class_device_attributes[i]); - down(&ld->sem); + mutex_lock(&ld->props_lock); ld->props = NULL; - up(&ld->sem); + mutex_unlock(&ld->props_lock); lcd_unregister_fb(ld); class_device_unregister(&ld->class_dev); } -- cgit v1.2.3