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authorDaniel Vetter <daniel.vetter@ffwll.ch>2013-10-07 17:15:45 -0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2013-10-10 12:47:05 +0200
commit3bbbe706e8e6dac36ae893dc23bdb378dd4f4413 (patch)
treec4f8df0b480578fec0fdb3d6024d9fbb7c2f739b /drivers/gpu/drm/i915/i915_gem.c
parenta4945f9522d27e1e6d64a02ad055e83768cb0896 (diff)
drm/i915: check that the i965g/gm 4G limit is really obeyed
In truly crazy circumstances shmem might give us the wrong type of page. So be a bit paranoid and double check this. Reviewer: Damien Lespiau <damien.lespiau@intel.com> Cc: Rob Clark <robdclark@gmail.com> References: http://lkml.org/lkml/2011/7/11/238 Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index ed9311aaabe..71dd0305eb3 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1902,6 +1902,9 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
sg->length += PAGE_SIZE;
}
last_pfn = page_to_pfn(page);
+
+ /* Check that the i965g/gm workaround works. */
+ WARN_ON((gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL));
}
#ifdef CONFIG_SWIOTLB
if (!swiotlb_nr_tbl())