Commit 1fb8510c authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: pcm: Add snd_pcm_stop_xrun() helper 



Add a new helper function snd_pcm_stop_xrun() to the standard sequnce
lock/snd_pcm_stop(XRUN)/unlock by a single call, and replace the
existing open codes with this helper.

The function checks the PCM running state to prevent setting the wrong
state, too, for more safety.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 31584ed1

drivers/media/pci/saa7134/saa7134-alsa.c

+1 −3
Original line number Diff line number Diff line
@@ -173,9 +173,7 @@ static void saa7134_irq_alsa_done(struct saa7134_dev *dev, 
		dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,

			dev->dmasound.bufsize, dev->dmasound.blocks);

		spin_unlock(&dev->slock);

		snd_pcm_stream_lock(dev->dmasound.substream);

		snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);

		snd_pcm_stream_unlock(dev->dmasound.substream);

		snd_pcm_stop_xrun(dev->dmasound.substream);

		return;

	}

include/sound/pcm.h

+1 −0
Original line number Diff line number Diff line
@@ -506,6 +506,7 @@ int snd_pcm_status(struct snd_pcm_substream *substream, 
int snd_pcm_start(struct snd_pcm_substream *substream);

int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);

int snd_pcm_drain_done(struct snd_pcm_substream *substream);

int snd_pcm_stop_xrun(struct snd_pcm_substream *substream);

#ifdef CONFIG_PM

int snd_pcm_suspend(struct snd_pcm_substream *substream);

int snd_pcm_suspend_all(struct snd_pcm *pcm);

sound/arm/pxa2xx-pcm-lib.c

+1 −3
Original line number Diff line number Diff line
@@ -200,9 +200,7 @@ void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id) 
	} else {

		printk(KERN_ERR "DMA error on channel %d (DCSR=%#x)\n",

			dma_ch, dcsr);

		snd_pcm_stream_lock(substream);

		snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);

		snd_pcm_stream_unlock(substream);

		snd_pcm_stop_xrun(substream);

	}

}

EXPORT_SYMBOL(pxa2xx_pcm_dma_irq);

sound/core/pcm_native.c

+23 −0
Original line number Diff line number Diff line
@@ -1098,6 +1098,29 @@ int snd_pcm_drain_done(struct snd_pcm_substream *substream) 
				     SNDRV_PCM_STATE_SETUP);

}



/**

 * snd_pcm_stop_xrun - stop the running streams as XRUN

 * @substream: the PCM substream instance

 * @state: PCM state after stopping the stream

 *

 * This stops the given running substream (and all linked substreams) as XRUN.

 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.

 *

 * Return: Zero if successful, or a negative error code.

 */

int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)

{

	unsigned long flags;

	int ret = 0;



	snd_pcm_stream_lock_irqsave(substream, flags);

	if (snd_pcm_running(substream))

		ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);

	snd_pcm_stream_unlock_irqrestore(substream, flags);

	return ret;

}

EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);



/*

 * pause callbacks

 */

sound/firewire/amdtp.c

+2 −6
Original line number Diff line number Diff line
@@ -1006,11 +1006,7 @@ void amdtp_stream_pcm_abort(struct amdtp_stream *s) 
	struct snd_pcm_substream *pcm;



	pcm = ACCESS_ONCE(s->pcm);

	if (pcm) {

		snd_pcm_stream_lock_irq(pcm);

		if (snd_pcm_running(pcm))

			snd_pcm_stop(pcm, SNDRV_PCM_STATE_XRUN);

		snd_pcm_stream_unlock_irq(pcm);

	}

	if (pcm)

		snd_pcm_stop_xrun(pcm);

}

EXPORT_SYMBOL(amdtp_stream_pcm_abort);

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