linux-kernel - [ 50/74] drm/radeon: fix UVD message buffer validation

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Date:	Mon, 26 Aug 2013 18:08:48 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Christian König <christian.koenig@....com>,
	Alex Deucher <alexander.deucher@....com>
Subject: [ 50/74] drm/radeon: fix UVD message buffer validation

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christian König <christian.koenig@....com>

commit 112a6d0c071808f6d48354fc8834a574e5dcefc0 upstream.

When the message buffer is currently moving block until it is idle again.

Signed-off-by: Christian König <christian.koenig@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_uvd.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -359,6 +359,14 @@ static int radeon_uvd_cs_msg(struct rade
 		return -EINVAL;
 	}
 
+	if (bo->tbo.sync_obj) {
+		r = radeon_fence_wait(bo->tbo.sync_obj, false);
+		if (r) {
+			DRM_ERROR("Failed waiting for UVD message (%d)!\n", r);
+			return r;
+		}
+	}
+
 	r = radeon_bo_kmap(bo, &ptr);
 	if (r)
 		return r;


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