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framebuffer compat_ioctl deadlock

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Fix deadlock in fb_compat_ioctl.  fb_compat_ioctl acquires a mutex and
calls fb_ioctl that tries to acquire that mutex too.  A regression added
during BKL removal.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mikulas Patocka 2008-10-29 14:01:17 -07:00 committed by Linus Torvalds
parent 51b7616e36
commit 120a37470c
1 changed files with 2 additions and 2 deletions
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4
drivers/video/fbmem.c
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@ -1262,8 +1262,8 @@ fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case FBIOPUT_CON2FBMAP:
arg = (unsigned long) compat_ptr(arg);
case FBIOBLANK:
ret = fb_ioctl(file, cmd, arg);
break;
mutex_unlock(&info->lock);
return fb_ioctl(file, cmd, arg);
case FBIOGET_FSCREENINFO:
ret = fb_get_fscreeninfo(inode, file, cmd, arg);