diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2013-05-06 13:54:50 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2013-05-20 13:24:07 +1000 |
| commit | c2e3259b7b6c89686892e4fbcc56dbcab14f1acf (patch) | |
| tree | 0bc21617f0ddfc1e90af64c94d0d0809c313b5e5 /drivers | |
| parent | fe6fc096b82eb0e84a0609f6431f7069f6c6c347 (diff) | |
drm/nve0/fifo: prevent races between clients updating playlists
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c index 9151919fb83..56192a7242a 100644 --- a/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c +++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c @@ -94,11 +94,13 @@ nve0_fifo_playlist_update(struct nve0_fifo_priv *priv, u32 engine) u32 match = (engine << 16) | 0x00000001; int i, p; + mutex_lock(&nv_subdev(priv)->mutex); cur = engn->playlist[engn->cur_playlist]; if (unlikely(cur == NULL)) { int ret = nouveau_gpuobj_new(nv_object(priv), NULL, 0x8000, 0x1000, 0, &cur); if (ret) { + mutex_unlock(&nv_subdev(priv)->mutex); nv_error(priv, "playlist alloc failed\n"); return; } @@ -122,6 +124,7 @@ nve0_fifo_playlist_update(struct nve0_fifo_priv *priv, u32 engine) nv_wr32(priv, 0x002274, (engine << 20) | (p >> 3)); if (!nv_wait(priv, 0x002284 + (engine * 4), 0x00100000, 0x00000000)) nv_error(priv, "playlist %d update timeout\n", engine); + mutex_unlock(&nv_subdev(priv)->mutex); } static int |