drm/nvc0/fifo: prevent races between clients updating playlists (fadb1719) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -71,6 +71,7 @@ nvc0_fifo_playlist_update(struct nvc0_fifo_priv *priv)
		struct nouveau_gpuobj *cur;
		int i, p;

		mutex_lock(&nv_subdev(priv)->mutex);
		cur = priv->playlist[priv->cur_playlist];
		priv->cur_playlist = !priv->cur_playlist;

		@@ -87,6 +88,7 @@ nvc0_fifo_playlist_update(struct nvc0_fifo_priv *priv)
		nv_wr32(priv, 0x002274, 0x01f00000 \| (p >> 3));
		if (!nv_wait(priv, 0x00227c, 0x00100000, 0x00000000))
		nv_error(priv, "playlist update failed\n");
		mutex_unlock(&nv_subdev(priv)->mutex);
		}

		static int