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ALSA: aloop - Use vmalloc buffer

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snd-aloop driver is virtual and has no need for allocating contiguous
pages.  It'll be more system-friendly to use vmalloc buffers.

Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2011-09-24 12:16:29 +02:00
parent 49957f3966
commit 6b69a0e520
1 changed files with 7 additions and 6 deletions
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13
sound/drivers/aloop.c
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@ -575,7 +575,8 @@ static void loopback_runtime_free(struct snd_pcm_runtime *runtime)
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));
return snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(params));
}
static int loopback_hw_free(struct snd_pcm_substream *substream)
@ -587,7 +588,7 @@ 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 snd_pcm_lib_free_vmalloc_buffer(substream);
}
static unsigned int get_cable_index(struct snd_pcm_substream *substream)
@ -740,6 +741,8 @@ static struct snd_pcm_ops loopback_playback_ops = {
.prepare = loopback_prepare,
.trigger = loopback_trigger,
.pointer = loopback_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static struct snd_pcm_ops loopback_capture_ops = {
@ -751,6 +754,8 @@ static struct snd_pcm_ops loopback_capture_ops = {
.prepare = loopback_prepare,
.trigger = loopback_trigger,
.pointer = loopback_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static int __devinit loopback_pcm_new(struct loopback *loopback,
@ -771,10 +776,6 @@ static int __devinit loopback_pcm_new(struct loopback *loopback,
strcpy(pcm->name, "Loopback PCM");
loopback->pcm[device] = pcm;
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
snd_dma_continuous_data(GFP_KERNEL),
0, 2 * 1024 * 1024);
return 0;
}