diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/gma500/gem.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/gtt.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c index 9fbb86868e2e..fc7d144bc2d3 100644 --- a/drivers/gpu/drm/gma500/gem.c +++ b/drivers/gpu/drm/gma500/gem.c @@ -124,6 +124,8 @@ static int psb_gem_create(struct drm_file *file, dev_err(dev->dev, "GEM init failed for %lld\n", size); return -ENOMEM; } + /* Limit the object to 32bit mappings */ + mapping_set_gfp_mask(r->gem.filp->f_mapping, GFP_KERNEL | __GFP_DMA32); /* Give the object a handle so we can carry it more easily */ ret = drm_gem_handle_create(file, &r->gem, &handle); if (ret) { diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c index db2e823e8951..54e5c9e1e6fa 100644 --- a/drivers/gpu/drm/gma500/gtt.c +++ b/drivers/gpu/drm/gma500/gtt.c @@ -39,6 +39,10 @@ static inline uint32_t psb_gtt_mask_pte(uint32_t pfn, int type) { uint32_t mask = PSB_PTE_VALID; + /* Ensure we explode rather than put an invalid low mapping of + a high mapping page into the gtt */ + BUG_ON(pfn & ~(0xFFFFFFFF >> PAGE_SHIFT)); + if (type & PSB_MMU_CACHED_MEMORY) mask |= PSB_PTE_CACHED; if (type & PSB_MMU_RO_MEMORY) |