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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2006-08-31 14:04:34 +1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-30 21:21:55 -0700 |
| commit | 98a3c781057fa43494e7e8b39d639e93fca0ecbf (patch) | |
| tree | 73a0cdcac3ec6ca0257de607efcfbedc8897fc07 /drivers/video/riva | |
| parent | 9129d6ea475b7e9f216c8324ea05b7a0d8aba540 (diff) | |
| download | linux-3.10-98a3c781057fa43494e7e8b39d639e93fca0ecbf.tar.gz linux-3.10-98a3c781057fa43494e7e8b39d639e93fca0ecbf.tar.bz2 linux-3.10-98a3c781057fa43494e7e8b39d639e93fca0ecbf.zip | |
[PATCH] fbdev: Fix crashes in various fbdev's blank routines
The backlight changes that went in had a bug where they could cause the
kernel to access an unitialized pointer when blanking if there is no
backlight control on a machine.
The bug affects atyfb, aty128fb, nvidiafb and rivafb. radeonfb seems to
be ok. This fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/riva')
| -rw-r--r-- | drivers/video/riva/fbdev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/video/riva/fbdev.c b/drivers/video/riva/fbdev.c index 76fc9d355eb..90363943bd5 100644 --- a/drivers/video/riva/fbdev.c +++ b/drivers/video/riva/fbdev.c @@ -354,6 +354,9 @@ static struct backlight_properties riva_bl_data = { 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; @@ -382,7 +385,7 @@ static void riva_bl_init(struct riva_par *par) bd = backlight_device_register(name, par, &riva_bl_data); if (IS_ERR(bd)) { info->bl_dev = NULL; - printk("riva: Backlight registration failed\n"); + printk(KERN_WARNING "riva: Backlight registration failed\n"); goto error; } |