drm/nv50/fifo: prevent races between clients updating playlists
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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9426eedb26
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b5096566f6
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@ -47,6 +47,7 @@ nv50_fifo_playlist_update(struct nv50_fifo_priv *priv)
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struct nouveau_gpuobj *cur;
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struct nouveau_gpuobj *cur;
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int i, p;
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int i, p;
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mutex_lock(&nv_subdev(priv)->mutex);
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cur = priv->playlist[priv->cur_playlist];
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cur = priv->playlist[priv->cur_playlist];
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priv->cur_playlist = !priv->cur_playlist;
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priv->cur_playlist = !priv->cur_playlist;
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@ -60,6 +61,7 @@ nv50_fifo_playlist_update(struct nv50_fifo_priv *priv)
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nv_wr32(priv, 0x0032f4, cur->addr >> 12);
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nv_wr32(priv, 0x0032f4, cur->addr >> 12);
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nv_wr32(priv, 0x0032ec, p);
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nv_wr32(priv, 0x0032ec, p);
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nv_wr32(priv, 0x002500, 0x00000101);
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nv_wr32(priv, 0x002500, 0x00000101);
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mutex_unlock(&nv_subdev(priv)->mutex);
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}
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}
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static int
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static int
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