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(parent: 4aab97e) | patch
drm/radeon/kms/pm: bail early if nothing's changing
authorAlex Deucher <alexdeucher@gmail.com>
Fri, 13 Aug 2010 14:53:35 +0000 (10:53 -0400)
committerDave Airlie <airlied@redhat.com>
Thu, 19 Aug 2010 22:46:13 +0000 (08:46 +1000)
commit4e186b2d6c878793587c35d7f06c94565d76e9b8
treed3f5bca149d1603ec0c4aabdc3e42a566da76bfetree | snapshot
parent4aab97e818c255a1bc25bb981f121a7992c6b290commit | diff
drm/radeon/kms/pm: bail early if nothing's changing

If we aren't changing the power state, no need to take
locks and schedule fences, etc.

There seem to be lock ordering issues in the CP and
fence code in some cases; see bug 29140 below.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=29140
Possibly also:
https://bugzilla.kernel.org/show_bug.cgi?id=16581

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/radeon/radeon_pm.c diff | blob | history
Domain: System / Kernel;