drm/radeon: fix UVD message buffer validation

commit 112a6d0c071808f6d48354fc8834a574e5dcefc0 upstream.

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

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

diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c
index 97002a0..f3ccf6d 100644 (file)
--- 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 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)
                return r;