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sound: usb-audio: use vmalloc buffer helper functions 

Remove this duplicate of snd_pcm_alloc_vmalloc_buffer and use the
equivalent core functions instead.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clemens Ladisch 2009-12-18 09:31:31 +01:00 committed by Takashi Iwai
parent 149feef54b
commit c55675e348
1 changed files with 5 additions and 41 deletions
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46
sound/usb/usbaudio.c
View File

@ -44,7 +44,6 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/usb.h>
#include <linux/vmalloc.h>
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <sound/core.h>
@ -735,41 +734,6 @@ static void snd_complete_sync_urb(struct urb *urb)
}
/* get the physical page pointer at the given offset */
static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
unsigned long offset)
{
void *pageptr = subs->runtime->dma_area + offset;
return vmalloc_to_page(pageptr);
}
/* allocate virtual buffer; may be called more than once */
static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
{
struct snd_pcm_runtime *runtime = subs->runtime;
if (runtime->dma_area) {
if (runtime->dma_bytes >= size)
return 0; /* already large enough */
vfree(runtime->dma_area);
}
runtime->dma_area = vmalloc_user(size);
if (!runtime->dma_area)
return -ENOMEM;
runtime->dma_bytes = size;
return 0;
}
/* free virtual buffer; may be called more than once */
static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
vfree(runtime->dma_area);
runtime->dma_area = NULL;
return 0;
}
/*
* unlink active urbs.
*/
@ -1449,8 +1413,8 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
unsigned int channels, rate, format;
int ret, changed;
ret = snd_pcm_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
if (ret < 0)
return ret;
@ -1507,7 +1471,7 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
subs->period_bytes = 0;
if (!subs->stream->chip->shutdown)
release_substream_urbs(subs, 0);
return snd_pcm_free_vmalloc_buffer(substream);
return snd_pcm_lib_free_vmalloc_buffer(substream);
}
/*
@ -1973,7 +1937,7 @@ static struct snd_pcm_ops snd_usb_playback_ops = {
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_pcm_playback_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_get_vmalloc_page,
.page = snd_pcm_lib_get_vmalloc_page,
};
static struct snd_pcm_ops snd_usb_capture_ops = {
@ -1985,7 +1949,7 @@ static struct snd_pcm_ops snd_usb_capture_ops = {
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_pcm_capture_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_get_vmalloc_page,
.page = snd_pcm_lib_get_vmalloc_page,
};