From: Ben Widawsky <ben@bwidawsk.net>
Date: Mon, 17 Oct 2011 22:51:55 +0000 (-0700)
Subject: drm/i915: ILK + VT-d workaround
X-Git-Tag: v3.2-rc1~135^2~2^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c0422878fcdc279ae9a8e8b66972a15b5efb67f;p=pandora-kernel.git

drm/i915: ILK + VT-d workaround

Idle the GPU before doing any unmaps. We know if VT-d is in use through
an exported variable from iommu code.

This should avoid a known HW issue.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Keith Packard <keithp@keithp.com>
---

Reading git-diff-tree failed