Patch "drm/dp/mst: Handle errors from drm_atomic_get_private_obj_state() correctly" has been added to the 4.13-stable tree

This is a note to let you know that I've just added the patch titled

drm/dp/mst: Handle errors from drm_atomic_get_private_obj_state() correctly

to the 4.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-dp-mst-handle-errors-from-drm_atomic_get_private_obj_state-correctly.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <[email protected]>
Date: Wed, 12 Jul 2017 18:51:00 +0300
Subject: drm/dp/mst: Handle errors from drm_atomic_get_private_obj_state() correctly
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Ville Syrjälä <[email protected]>

commit 56a91c4932bd038f3d1f6555ddc349ca4e6933b0 upstream.

On failure drm_atomic_get_private_obj_state() returns and error pointer instead of NULL. Adjust the checks in the callers to match.

---
 drivers/gpu/drm/drm_dp_mst_topology.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

@@ -2540,8 +2540,8 @@ int drm_dp_atomic_find_vcpi_slots(struct
 	int req_slots;
 
 	topology_state = drm_atomic_get_mst_topology_state(state, mgr);
-	if (topology_state == NULL)
-		return -ENOMEM;
+	if (IS_ERR(topology_state))
+		return PTR_ERR(topology_state);
 
 	port = drm_dp_get_validated_port_ref(mgr, port);
 	if (port == NULL)

@@ -2580,8 +2580,8 @@ int drm_dp_atomic_release_vcpi_slots(str
 	struct drm_dp_mst_topology_state *topology_state;
 
 	topology_state = drm_atomic_get_mst_topology_state(state, mgr);
-	if (topology_state == NULL)
-		return -ENOMEM;
+	if (IS_ERR(topology_state))
+		return PTR_ERR(topology_state);
 
 	/* We cannot rely on port->vcpi.num_slots to update
 	 * topology_state->avail_slots as the port may not exist if the parent

Patches currently in stable-queue which might be from [email protected] are

queue-4.13/drm-dp-mst-handle-errors-from-drm_atomic_get_private_obj_state-correctly.patch