[Nouveau] [PATCH] drm: fix missing return statement in nouveau_ttm_tt_unpopulate

[Alexandre Courbot]

nouveau_ttm_tt_unpopulate() is supposed to return right after calling
ttm_dma_unpopulate() in the case of a coherent buffer. The return
statement was omitted, leading to the pages being unmapped twice. Fix
this.

Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
---
 drm/nouveau_bo.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drm/nouveau_bo.c b/drm/nouveau_bo.c
index 686fbd62381e..038d7e30c305 100644
--- a/drm/nouveau_bo.c
+++ b/drm/nouveau_bo.c
@@ -1573,8 +1573,10 @@ nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
 	 * so use the DMA API for them.
 	 */
 	if (!nv_device_is_cpu_coherent(device) &&
-	    ttm->caching_state == tt_uncached)
+	    ttm->caching_state == tt_uncached) {
 		ttm_dma_unpopulate(ttm_dma, dev->dev);
+		return;
+	}
 
 #if __OS_HAS_AGP
 	if (drm->agp.stat == ENABLED) {
-- 
2.1.3