Patch "drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set" has been added to the 4.9-stable tree

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

drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set

to the 4.9-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-msm-verify-that-msm_submit_bo_flags-are-set.patch
and it can be found in the queue-4.9 subdirectory.

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

From: Jordan Crouse <[email protected]>
Date: Tue, 20 Dec 2016 08:54:31 -0700
Subject: drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set

From: Jordan Crouse <[email protected]>

[ Upstream commit a6cb3b864b21b7345f824a4faa12b723c8aaf099 ]

For every submission buffer object one of MSM_SUBMIT_BO_WRITE and MSM_SUBMIT_BO_READ must be set (and nothing else). If we allowed zero then the buffer object would never get queued to be unreferenced.

---
 drivers/gpu/drm/msm/msm_gem_submit.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -106,7 +106,8 @@ static int submit_lookup_objects(struct
 			pagefault_disable();
 		}
 
-		if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) {
+		if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
+			!(submit_bo.flags & MSM_SUBMIT_BO_FLAGS)) {
 			DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 			ret = -EINVAL;
 			goto out_unlock;

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

queue-4.9/drm-msm-verify-that-msm_submit_bo_flags-are-set.patch queue-4.9/drm-msm-put-back-the-vaddr-in-submit_reloc.patch queue-4.9/drm-msm-ensure-that-the-hardware-write-pointer-is-valid.patch