From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 9 Apr 2012 12:59:46 +0000 (+0100)
Subject: drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g
X-Git-Tag: v3.2.16~66
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4aca1c9b1f8fc59d416f9ea466851ce1d8b36c1;p=pandora-kernel.git

drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g

commit 27c1cbd06a7620b354cbb363834f3bb8df4f410d upstream.

The 845g shares the errata with i830 whereby executing a command
within 2 cachelines of the end of the ringbuffer may cause a GPU hang.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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