From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
3.4.110-rc1 review patch. If anyone has any objections, please let me know.
------------------
commit 8b572a4200828b4e75cc22ed2f494b58d5372d65 upstream.
In needs_ilk_vtd_wa(), we pass in the GPU device but compared it against
the ids for the mobile GPU and the mobile host bridge. That latter is
impossible and so likely was just a typo for the desktop GPU device id
(which is also buggy).
Fixes commit da88a5f7f7d434e2cde1b3e19d952e6d84533662
Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date: Wed Feb 13 09:31:53 2013 +0000
drm/i915: Disable WC PTE updates to w/a buggy IOMMU on ILK
Reported-by: Ting-Wei Lan <lantw44@xxxxxxxxx>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91127
References: https://bugzilla.freedesktop.org/show_bug.cgi?id=60391
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Zefan Li <lizefan@xxxxxxxxxx>
---
drivers/char/agp/intel-gtt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 7f025fb..4e985cd 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -1194,7 +1194,7 @@ static inline int needs_idle_maps(void)
/* Query intel_iommu to see if we need the workaround. Presumably that
* was loaded first.
*/
- if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_HB ||
+ if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG ||
gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG) &&
intel_iommu_gfx_mapped)
return 1;
--
1.9.1
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