From b5096566f6e1ee2b88324772f020ae9bc0cfa9a0 Mon Sep 17 00:00:00 2001 From: Ben Skeggs <bskeggs@redhat.com> Date: Tue, 14 May 2013 13:33:56 +1000 Subject: [PATCH] drm/nv50/fifo: prevent races between clients updating playlists Signed-off-by: Ben Skeggs <bskeggs@redhat.com> --- drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c index ddaeb55729038..89bf459d584bb 100644 --- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c +++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c @@ -47,6 +47,7 @@ nv50_fifo_playlist_update(struct nv50_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; @@ -60,6 +61,7 @@ nv50_fifo_playlist_update(struct nv50_fifo_priv *priv) nv_wr32(priv, 0x0032f4, cur->addr >> 12); nv_wr32(priv, 0x0032ec, p); nv_wr32(priv, 0x002500, 0x00000101); + mutex_unlock(&nv_subdev(priv)->mutex); } static int -- GitLab