tree 9f822122eb36cd6eb496fa95da32f4e5e590c262
parent 60635529f6aec7572ae7009aabd80558cf2f43b4
author Alex Deucher <alexander.deucher@amd.com> 1318983005 -0400
committer Greg Kroah-Hartman <gregkh@suse.de> 1319519414 +0200

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

commit 5a6e8482a16e61250a9121fc9ec719ab0529e760 upstream.

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>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>