tree d69c0e903f122acff0accf0e6f6e9bb4b9f2ce5d
parent a4863ca93ccc52a83e7fbfc068b411b7faa03805
author Alex Deucher <alexander.deucher@amd.com> 1318983005 -0400
committer Dave Airlie <airlied@redhat.com> 1319014067 +0100

drm/radeon/kms/atom: fix handling of FB scratch indices

FB scratch indices are dword indices, but we were treating
them as byte indices.  As such, we were getting the wrong
FB scratch data for non-0 indices.  Fix the indices and
guard the indexing against indices larger than the scratch
allocation.

Fixes memory corruption on some boards if data was written
past the end of the FB scratch array.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reported-by: Dave Airlie <airlied@redhat.com>
Tested-by: Dave Airlie <airlied@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>