Commit fadb1719 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

drm/nvc0/fifo: prevent races between clients updating playlists 



Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent c2e3259b

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