From: Jerome Glisse <jglisse@redhat.com>
Date: Wed, 12 Dec 2012 21:43:15 +0000 (-0500)
Subject: drm/radeon: fix fence driver for dma ring when wb is disabled
X-Git-Tag: v3.8-rc1~82^2~3^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86a1881d08f65a42c17071a59c0088dbe2870246;p=pandora-kernel.git

drm/radeon: fix fence driver for dma ring when wb is disabled

The dma ring can't write to register thus have to write to memory
its fence value. This ensure that it doesn't try to use scratch
register for dma ring fence driver.

Should fix:
https://bugs.freedesktop.org/show_bug.cgi?id=58166

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