ALSA: pcm_dmaengine: Don't synchronize DMA channel when DMA is paused
commit88e98af9f4
upstream. When suspended, the DMA channel may enter PAUSE state if dmaengine_pause() is supported by DMA. At this state, dmaengine_synchronize() should not be called, otherwise the DMA channel can't be resumed successfully. Fixes:e8343410dd
("ALSA: dmaengine: Synchronize dma channel after drop()") Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Cc: <stable@vger.kernel.org> Link: https://patch.msgid.link/1721198693-27636-1-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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committed by
Greg Kroah-Hartman
parent
0bdafa35d0
commit
56eb8b9612
@ -352,8 +352,12 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open_request_chan);
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int snd_dmaengine_pcm_sync_stop(struct snd_pcm_substream *substream)
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int snd_dmaengine_pcm_sync_stop(struct snd_pcm_substream *substream)
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{
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{
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struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
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struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
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struct dma_tx_state state;
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enum dma_status status;
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dmaengine_synchronize(prtd->dma_chan);
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status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state);
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if (status != DMA_PAUSED)
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dmaengine_synchronize(prtd->dma_chan);
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return 0;
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return 0;
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}
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}
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