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drm/i915: ILK + VT-d workaround
authorBen Widawsky <ben@bwidawsk.net>
Mon, 17 Oct 2011 22:51:55 +0000 (15:51 -0700)
committerKeith Packard <keithp@keithp.com>
Thu, 20 Oct 2011 22:26:39 +0000 (15:26 -0700)
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>

No differences found
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