drm/radeon: fix possible lack of synchronization btw ttm and other ring

We need to sync with the GFX ring as ttm might have schedule bo move
on it and new command scheduled for other ring need to wait for bo
data to be in place.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_cs.c

@@ -122,15 +122,15 @@ static int radeon_cs_sync_rings(struct radeon_cs_parser *p)
 	int i, r;
 
 	for (i = 0; i < p->nrelocs; i++) {
+		struct radeon_fence *fence;
+
 		if (!p->relocs[i].robj || !p->relocs[i].robj->tbo.sync_obj)
 			continue;
 
-		if (!(p->relocs[i].flags & RADEON_RELOC_DONT_SYNC)) {
+		fence = p->relocs[i].robj->tbo.sync_obj;
-			struct radeon_fence *fence = p->relocs[i].robj->tbo.sync_obj;
+		if (fence->ring != p->ring && !radeon_fence_signaled(fence)) {
-			if (fence->ring != p->ring && !radeon_fence_signaled(fence)) {
+			sync_to_ring[fence->ring] = true;
-				sync_to_ring[fence->ring] = true;
+			need_sync = true;
-				need_sync = true;
-			}
 		}
 	}
 

include/drm/radeon_drm.h

@@ -926,7 +926,6 @@ struct drm_radeon_cs_chunk {
 };
 
 /* drm_radeon_cs_reloc.flags */
-#define RADEON_RELOC_DONT_SYNC		0x01
 
 struct drm_radeon_cs_reloc {
 	uint32_t		handle;