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authorBen Skeggs <bskeggs@redhat.com>2013-05-14 13:33:56 +1000
committerBen Skeggs <bskeggs@redhat.com>2013-05-20 13:24:09 +1000
commitb5096566f6e1ee2b88324772f020ae9bc0cfa9a0 (patch)
treed59d41001909f622c1e91fb92154f4b30e03ac9f /drivers/gpu
parent9426eedb26cfe646a843295ac7f91bf866323f92 (diff)
drm/nv50/fifo: prevent races between clients updating playlists
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c
index ddaeb5572903..89bf459d584b 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