drm: avoid switching to text console if there is no panic timeout
commitd68752cf7bb92eafbbe6a0df0d0fab67e87523f6
authorHugh Dickins <hughd@chromium.org>
Tue, 18 Oct 2011 00:06:40 +0000 (17 17:06 -0700)
committerDave Airlie <airlied@redhat.com>
Thu, 10 Nov 2011 21:27:34 +0000 (10 21:27 +0000)
tree19ea6aaef4db1dbb9b12e7271e6da497d9e59ab1
parent1ea6b8f48918282bdca0b32a34095504ee65bab5
drm: avoid switching to text console if there is no panic timeout

Add a check for panic_timeout in the drm_fb_helper_panic() notifier: if
we're going to reboot immediately, the user will not be able to see the
messages anyway, and messing with the video mode may display artifacts,
and certainly get into several layers of complexity (including mutexes and
memory allocations) which we shall be much safer to avoid.

Signed-off-by: Hugh Dickins <hughd@google.com>
[ Edited commit message and modified to short-circuit panic_timeout < 0
  instead of testing panic_timeout >= 0.  -Mandeep ]
Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/drm_fb_helper.c