drm/nouveau: fix race when adding delayed work items

kernel.org bz#198221. Reported-by: Petr Vandrovec <petr@vandrovec.name> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
mariux64 · Dec 22, 2017 · b26a231 · b26a231
1 parent 4ef9289
commit b26a231
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -152,9 +152,9 @@ nouveau_cli_work_queue(struct nouveau_cli *cli, struct dma_fence *fence,
 	work->cli = cli;
 	mutex_lock(&cli->lock);
 	list_add_tail(&work->head, &cli->worker);
-	mutex_unlock(&cli->lock);
 	if (dma_fence_add_callback(fence, &work->cb, nouveau_cli_work_fence))
 		nouveau_cli_work_fence(fence, &work->cb);
+	mutex_unlock(&cli->lock);
 }
 
 static void