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authorKrzysztof Helt <krzysztof.h1@wp.pl>2009-07-07 19:15:16 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-07-08 18:19:49 +0200
commitfeaa61e49b126c2206051a234b8f14ccc75b9f61 (patch)
treef1b02b85d08b5b60a0278a6711a1ed1d14cd7c5c /drivers/video/atafb.c
parenti810fb: fix regression with uninitalized fb_info->mm_lock mutex (diff)
downloadlinux-feaa61e49b126c2206051a234b8f14ccc75b9f61.tar.xz
linux-feaa61e49b126c2206051a234b8f14ccc75b9f61.zip
atafb: fix regression with uninitalized fb_info->mm_lock mutex
Remove redundant locking of the fb_info->mm_lock mutex before the frambuffer is registered. This fixes a problem with uninitialized the fb_info->mm_lock mutex introduced by the commit 537a1bf059f " fbdev: add mutex for fb_mmap locking" Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r--drivers/video/atafb.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/video/atafb.c b/drivers/video/atafb.c
index 497ff8af03ed..8cd279be74e5 100644
--- a/drivers/video/atafb.c
+++ b/drivers/video/atafb.c
@@ -2405,6 +2405,9 @@ static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
return 0;
}
+/* fbhw->encode_fix() must be called with fb_info->mm_lock held
+ * if it is called after the register_framebuffer() - not a case here
+ */
static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
{
struct atafb_par par;
@@ -2414,9 +2417,7 @@ static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
if (err)
return err;
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
- mutex_lock(&info->mm_lock);
err = fbhw->encode_fix(fix, &par);
- mutex_unlock(&info->mm_lock);
return err;
}