From: Jerome Glisse <jglisse@redhat.com>
Date: Thu, 6 Jun 2013 21:51:21 +0000 (-0400)
Subject: drm/radeon: fix write back suspend regression with uvd v2
X-Git-Tag: v3.10-rc7~9^2~1^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=089920f21db0108fb105ecfd81de4c92d88f06d0;p=pandora-kernel.git

drm/radeon: fix write back suspend regression with uvd v2

UVD ring can't use scratch thus it does need writeback buffer to keep
a valid address or radeon_ring_backup will trigger a kernel fault.

It's ok to not unpin the write back buffer on suspend as it leave in
gtt and thus does not need eviction.

v2: Fix the uvd case.

Reported and tracked by Wojtek <wojtask9@wp.pl>

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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