Patch "drm/radeon: hold reference to fences in radeon_sa_bo_new" has been added to the 3.10-stable tree

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

drm/radeon: hold reference to fences in radeon_sa_bo_new

to the 3.10-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-radeon-hold-reference-to-fences-in-radeon_sa_bo_new.patch
and it can be found in the queue-3.10 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?Nicolai=20H=C3=A4hnle?= <[email protected]>
Date: Fri, 5 Feb 2016 14:35:53 -0500
Subject: drm/radeon: hold reference to fences in radeon_sa_bo_new
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From: Nicolai Hähnle <[email protected]>

commit f6ff4f67cdf8455d0a4226eeeaf5af17c37d05eb upstream.

An arbitrary amount of time can pass between spin_unlock and radeon_fence_wait_any, so we need to ensure that nobody frees the fences from under us.

Based on the analogous fix for amdgpu.

---
 drivers/gpu/drm/radeon/radeon_sa.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -349,8 +349,13 @@ int radeon_sa_bo_new(struct radeon_devic
 			/* see if we can skip over some allocations */
 		} while (radeon_sa_bo_next_hole(sa_manager, fences, tries));
 
+		for (i = 0; i < RADEON_NUM_RINGS; ++i)
+			radeon_fence_ref(fences[i]);
+
 		spin_unlock(&sa_manager->wq.lock);
 		r = radeon_fence_wait_any(rdev, fences, false);
+		for (i = 0; i < RADEON_NUM_RINGS; ++i)
+			radeon_fence_unref(&fences[i]);
 		spin_lock(&sa_manager->wq.lock);
 		/* if we have nothing to wait for block */
 		if (r == -ENOENT && block) {

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

queue-3.10/drm-radeon-hold-reference-to-fences-in-radeon_sa_bo_new.patch