diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-10-07 17:15:45 -0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-10-10 12:47:05 +0200 |
| commit | 3bbbe706e8e6dac36ae893dc23bdb378dd4f4413 (patch) | |
| tree | c4f8df0b480578fec0fdb3d6024d9fbb7c2f739b | |
| parent | a4945f9522d27e1e6d64a02ad055e83768cb0896 (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>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 3 |
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 ed9311aaabe7..71dd0305eb32 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()) |