From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 9 Apr 2013 14:13:22 +0000 (-0400)
Subject: drm/radeon: handle broken disabled rb mask gracefully
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~55^2~43^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cedb655a3a7764c3fd946077944383c9e0e68dd4;p=pandora-kernel.git

drm/radeon: handle broken disabled rb mask gracefully

If the disabled rb mask register is not properly initialized
program a sane default based on the number of RBs for the
asic.  This avoids a potential divide by 0 when calculating
the backend mask.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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