drm/radeon: Don't try to enable write-combining without PAT

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Doing so can cause things to become slow.

Print a warning at compile time and an informative message at runtime in
that case.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88758
Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Michel Dänzer 2015-02-04 10:19:51 +09:00 • committed by Alex Deucher

parent 082452e125

commit a53fa43873

1 changed files with 12 additions and 0 deletions

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drivers/gpu/drm/radeon/radeon_object.c

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