[PATCH] backlight last round of fixes
Fix some more problems (inverted use of semaphores in some places). He
also moved my checks into within the protected section which is better.
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/macintosh/via-pmu-backlight.c b/drivers/macintosh/via-pmu-backlight.c
index 4397fac..a82f313 100644
--- a/drivers/macintosh/via-pmu-backlight.c
+++ b/drivers/macintosh/via-pmu-backlight.c
@@ -167,11 +167,11 @@
pmu_backlight_data.max_brightness / 15);
}
- up(&bd->sem);
+ down(&bd->sem);
bd->props->brightness = level;
bd->props->power = FB_BLANK_UNBLANK;
bd->props->update_status(bd);
- down(&bd->sem);
+ up(&bd->sem);
mutex_lock(&pmac_backlight_mutex);
if (!pmac_backlight)
diff --git a/drivers/video/aty/aty128fb.c b/drivers/video/aty/aty128fb.c
index 106d428..276a215 100644
--- a/drivers/video/aty/aty128fb.c
+++ b/drivers/video/aty/aty128fb.c
@@ -1800,14 +1800,15 @@
static void aty128_bl_set_power(struct fb_info *info, int power)
{
- if (info->bl_dev == NULL)
- return;
-
mutex_lock(&info->bl_mutex);
- up(&info->bl_dev->sem);
- info->bl_dev->props->power = power;
- __aty128_bl_update_status(info->bl_dev);
- down(&info->bl_dev->sem);
+
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->power = power;
+ __aty128_bl_update_status(info->bl_dev);
+ up(&info->bl_dev->sem);
+ }
+
mutex_unlock(&info->bl_mutex);
}
@@ -1842,11 +1843,11 @@
219 * FB_BACKLIGHT_MAX / MAX_LEVEL);
mutex_unlock(&info->bl_mutex);
- up(&bd->sem);
+ down(&bd->sem);
bd->props->brightness = aty128_bl_data.max_brightness;
bd->props->power = FB_BLANK_UNBLANK;
bd->props->update_status(bd);
- down(&bd->sem);
+ up(&bd->sem);
#ifdef CONFIG_PMAC_BACKLIGHT
mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c
index 510e4ea..19a71f0 100644
--- a/drivers/video/aty/atyfb_base.c
+++ b/drivers/video/aty/atyfb_base.c
@@ -2199,14 +2199,15 @@
static void aty_bl_set_power(struct fb_info *info, int power)
{
- if (info->bl_dev == NULL)
- return;
-
mutex_lock(&info->bl_mutex);
- up(&info->bl_dev->sem);
- info->bl_dev->props->power = power;
- __aty_bl_update_status(info->bl_dev);
- down(&info->bl_dev->sem);
+
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->power = power;
+ __aty_bl_update_status(info->bl_dev);
+ up(&info->bl_dev->sem);
+ }
+
mutex_unlock(&info->bl_mutex);
}
@@ -2237,11 +2238,11 @@
0xFF * FB_BACKLIGHT_MAX / MAX_LEVEL);
mutex_unlock(&info->bl_mutex);
- up(&bd->sem);
+ down(&bd->sem);
bd->props->brightness = aty_bl_data.max_brightness;
bd->props->power = FB_BLANK_UNBLANK;
bd->props->update_status(bd);
- down(&bd->sem);
+ up(&bd->sem);
#ifdef CONFIG_PMAC_BACKLIGHT
mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/aty/radeon_backlight.c b/drivers/video/aty/radeon_backlight.c
index 1755ddd..585eb7b 100644
--- a/drivers/video/aty/radeon_backlight.c
+++ b/drivers/video/aty/radeon_backlight.c
@@ -195,11 +195,11 @@
217 * FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL);
mutex_unlock(&rinfo->info->bl_mutex);
- up(&bd->sem);
+ down(&bd->sem);
bd->props->brightness = radeon_bl_data.max_brightness;
bd->props->power = FB_BLANK_UNBLANK;
bd->props->update_status(bd);
- down(&bd->sem);
+ up(&bd->sem);
#ifdef CONFIG_PMAC_BACKLIGHT
mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/nvidia/nv_backlight.c b/drivers/video/nvidia/nv_backlight.c
index 14c37c4..5b75ae4 100644
--- a/drivers/video/nvidia/nv_backlight.c
+++ b/drivers/video/nvidia/nv_backlight.c
@@ -112,13 +112,15 @@
void nvidia_bl_set_power(struct fb_info *info, int power)
{
- if (info->bl_dev == NULL)
- return;
mutex_lock(&info->bl_mutex);
- up(&info->bl_dev->sem);
- info->bl_dev->props->power = power;
- __nvidia_bl_update_status(info->bl_dev);
- down(&info->bl_dev->sem);
+
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->power = power;
+ __nvidia_bl_update_status(info->bl_dev);
+ up(&info->bl_dev->sem);
+ }
+
mutex_unlock(&info->bl_mutex);
}
@@ -153,11 +155,11 @@
0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
mutex_unlock(&info->bl_mutex);
- up(&bd->sem);
+ down(&bd->sem);
bd->props->brightness = nvidia_bl_data.max_brightness;
bd->props->power = FB_BLANK_UNBLANK;
bd->props->update_status(bd);
- down(&bd->sem);
+ up(&bd->sem);
#ifdef CONFIG_PMAC_BACKLIGHT
mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/riva/fbdev.c b/drivers/video/riva/fbdev.c
index 9036394..8ddb47a 100644
--- a/drivers/video/riva/fbdev.c
+++ b/drivers/video/riva/fbdev.c
@@ -354,14 +354,15 @@
static void riva_bl_set_power(struct fb_info *info, int power)
{
- if (info->bl_dev == NULL)
- return;
-
mutex_lock(&info->bl_mutex);
- up(&info->bl_dev->sem);
- info->bl_dev->props->power = power;
- __riva_bl_update_status(info->bl_dev);
- down(&info->bl_dev->sem);
+
+ if (info->bl_dev) {
+ down(&info->bl_dev->sem);
+ info->bl_dev->props->power = power;
+ __riva_bl_update_status(info->bl_dev);
+ up(&info->bl_dev->sem);
+ }
+
mutex_unlock(&info->bl_mutex);
}
@@ -396,11 +397,11 @@
0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
mutex_unlock(&info->bl_mutex);
- up(&bd->sem);
+ down(&bd->sem);
bd->props->brightness = riva_bl_data.max_brightness;
bd->props->power = FB_BLANK_UNBLANK;
bd->props->update_status(bd);
- down(&bd->sem);
+ up(&bd->sem);
#ifdef CONFIG_PMAC_BACKLIGHT
mutex_lock(&pmac_backlight_mutex);
