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| author | Andrea Righi <righi.andrea@gmail.com> | 2009-04-13 23:39:39 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-14 00:04:28 +0200 |
| commit | 513adb58685615b0b1d47a3f0d40f5352beff189 (patch) | |
| tree | 80afe08d17f24bbf3d5ad48d62df2e143d00ae95 /drivers/video/vfb.c | |
| parent | init/initramfs: fix warning with CONFIG_BLK_DEV_RAM=n (diff) | |
| download | linux-513adb58685615b0b1d47a3f0d40f5352beff189.tar.xz linux-513adb58685615b0b1d47a3f0d40f5352beff189.zip | |
fbdev: fix info->lock deadlock in fbcon_event_notify()
fb_notifier_call_chain() is called with info->lock held, i.e. in
do_fb_ioctl() => FBIOPUT_VSCREENINFO => fb_set_var() and the some
notifier callbacks, like fbcon_event_notify(), try to re-acquire
info->lock again.
Remove the lock/unlock_fb_info() in all the framebuffer notifier
callbacks' and be sure to always call fb_notifier_call_chain() with
info->lock held.
Reported-by: Pavel Roskin <proski@gnu.org>
Reported-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/vfb.c')
0 files changed, 0 insertions, 0 deletions