diff options
| -rw-r--r-- | sound/soc/sh/rcar/dma.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c index 2b73df84a769..cd7b79a01ce2 100644 --- a/sound/soc/sh/rcar/dma.c +++ b/sound/soc/sh/rcar/dma.c @@ -539,6 +539,13 @@ void rsnd_dma_start(struct rsnd_dma *dma) void rsnd_dma_quit(struct rsnd_dma *dma) { + struct rsnd_mod *mod = rsnd_dma_to_mod(dma); + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); + + if (!dmac) + return; + dma->ops->quit(dma); } @@ -548,8 +555,18 @@ int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id) struct rsnd_mod *mod_from; struct rsnd_mod *mod_to; struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); int is_play = rsnd_io_is_play(io); + /* + * DMA failed. try to PIO mode + * see + * rsnd_ssi_fallback() + * rsnd_rdai_continuance_probe() + */ + if (!dmac) + return -EAGAIN; + rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to); dma->src_addr = rsnd_dma_addr(priv, mod_from, is_play, 1); @@ -589,7 +606,7 @@ int rsnd_dma_probe(struct platform_device *pdev, dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL); if (!dmac || !res) { dev_err(dev, "dma allocate failed\n"); - return -ENOMEM; + return 0; /* it will be PIO mode */ } dmac->dmapp_num = 0; |