[PATCH] drm/radeon: fix UVD message buffer validation

[Christian König]

From: Christian K?nig <christian.koe...@amd.com>

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

Signed-off-by: Christian K?nig <christian.koenig at amd.com>
Cc: stable at vger.kernel.org
---
 drivers/gpu/drm/radeon/radeon_uvd.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c 
b/drivers/gpu/drm/radeon/radeon_uvd.c
index f1c1575..b79f4f5 100644
--- a/drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -356,6 +356,14 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, 
struct radeon_bo *bo,
                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) {
                DRM_ERROR("Failed mapping the UVD message (%d)!\n", r);
-- 
1.7.9.5