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drm/i915: Initialise GTT MTRR to -1

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Fixes a regression from 9e984bc1 (drm/i915: Don't do MTRR setup if PAT
is enabled) where we left the MTRR as 0 and so tried to free a MTRR we
did not own during unload.

Reported-and-tested-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson
2012-03-23 17:38:49 +00:00
committed by Daniel Vetter
parent f2c9677be3
commit 23f54beafe
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_dma.c
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@@ -1923,6 +1923,8 @@ static void
i915_mtrr_setup(struct drm_i915_private *dev_priv, unsigned long base,
unsigned long size)
{
dev_priv->mm.gtt_mtrr = -1;
#if defined(CONFIG_X86_PAT)
if (cpu_has_pat)
return;