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ALSA: aloop: Use managed buffer allocation

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Clean up the driver with the new managed buffer allocation API.
The hw_params callback became superfluous and got dropped.

Link: https://lore.kernel.org/r/20191209094943.14984-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2019-12-09 10:48:36 +01:00
parent 37b9b9a507
commit 39729889b1
1 changed files with 2 additions and 10 deletions
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12
sound/drivers/aloop.c
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@ -905,12 +905,6 @@ static void loopback_runtime_free(struct snd_pcm_runtime *runtime)
kfree(dpcm);
}
static int loopback_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
}
static int loopback_hw_free(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
@ -920,7 +914,7 @@ static int loopback_hw_free(struct snd_pcm_substream *substream)
mutex_lock(&dpcm->loopback->cable_lock);
cable->valid &= ~(1 << substream->stream);
mutex_unlock(&dpcm->loopback->cable_lock);
return snd_pcm_lib_free_pages(substream);
return 0;
}
static unsigned int get_cable_index(struct snd_pcm_substream *substream)
@ -1306,7 +1300,6 @@ static const struct snd_pcm_ops loopback_pcm_ops = {
.open = loopback_open,
.close = loopback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = loopback_hw_params,
.hw_free = loopback_hw_free,
.prepare = loopback_prepare,
.trigger = loopback_trigger,
@ -1325,8 +1318,7 @@ static int loopback_pcm_new(struct loopback *loopback,
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &loopback_pcm_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &loopback_pcm_ops);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
NULL, 0, 0);
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
pcm->private_data = loopback;
pcm->info_flags = 0;