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authorThomas Hellstrom <thellstrom@vmware.com>2017-03-27 11:21:25 +0200
committerThomas Hellstrom <thellstrom@vmware.com>2017-03-30 11:43:39 +0200
commitfe25deb7737ce6c0879ccf79c99fa1221d428bf2 (patch)
tree8e5091f95dc74616cb5aab8560f8a0b7d1b8e577 /include
parent63774069d9527a1aeaa4aa20e929ef5e8e9ecc38 (diff)
downloadlinux-fe25deb7737ce6c0879ccf79c99fa1221d428bf2.tar.bz2
drm/ttm, drm/vmwgfx: Relax permission checking when opening surfaces
Previously, when a surface was opened using a legacy (non prime) handle, it was verified to have been created by a client in the same master realm. Relax this so that opening is also allowed recursively if the client already has the surface open. This works around a regression in svga mesa where opening of a shared surface is used recursively to obtain surface information. Cc: <stable@vger.kernel.org> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Diffstat (limited to 'include')
-rw-r--r--include/drm/ttm/ttm_object.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/drm/ttm/ttm_object.h b/include/drm/ttm/ttm_object.h
index ed953f98f0e1..1487011fe057 100644
--- a/include/drm/ttm/ttm_object.h
+++ b/include/drm/ttm/ttm_object.h
@@ -229,6 +229,8 @@ extern void ttm_base_object_unref(struct ttm_base_object **p_base);
* @ref_type: The type of reference.
* @existed: Upon completion, indicates that an identical reference object
* already existed, and the refcount was upped on that object instead.
+ * @require_existed: Fail with -EPERM if an identical ref object didn't
+ * already exist.
*
* Checks that the base object is shareable and adds a ref object to it.
*
@@ -243,7 +245,8 @@ extern void ttm_base_object_unref(struct ttm_base_object **p_base);
*/
extern int ttm_ref_object_add(struct ttm_object_file *tfile,
struct ttm_base_object *base,
- enum ttm_ref_type ref_type, bool *existed);
+ enum ttm_ref_type ref_type, bool *existed,
+ bool require_existed);
extern bool ttm_ref_object_exists(struct ttm_object_file *tfile,
struct ttm_base_object *base);