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| author | Joerg Roedel <joerg.roedel@amd.com> | 2009-06-09 10:50:57 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-06-09 10:50:57 +0200 |
| commit | d2dd01de9924ae24afeba5aa5bc2e08287701df6 (patch) | |
| tree | 3021bf496579a48984666355b59df5e44b42dd32 /drivers/gpu/drm/drm_bufs.c | |
| parent | 367d04c4ec02dad34d80452e32e3370db7fb6fee (diff) | |
| parent | 62a6f465f6572e1f28765c583c12753bb3e23715 (diff) | |
Merge commit 'tip/core/iommu' into amd-iommu/fixes
Diffstat (limited to 'drivers/gpu/drm/drm_bufs.c')
| -rw-r--r-- | drivers/gpu/drm/drm_bufs.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c index 6d80d17f1e9..80a257554b3 100644 --- a/drivers/gpu/drm/drm_bufs.c +++ b/drivers/gpu/drm/drm_bufs.c @@ -170,6 +170,14 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, } DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", (unsigned long long)map->offset, map->size, map->type); + + /* page-align _DRM_SHM maps. They are allocated here so there is no security + * hole created by that and it works around various broken drivers that use + * a non-aligned quantity to map the SAREA. --BenH + */ + if (map->type == _DRM_SHM) + map->size = PAGE_ALIGN(map->size); + if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { drm_free(map, sizeof(*map), DRM_MEM_MAPS); return -EINVAL; @@ -363,7 +371,8 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, list->user_token = list->hash.key << PAGE_SHIFT; mutex_unlock(&dev->struct_mutex); - list->master = dev->primary->master; + if (!(map->flags & _DRM_DRIVER)) + list->master = dev->primary->master; *maplist = list; return 0; } |