sound: pdaudiocf: 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>

sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c

@@ -21,56 +21,12 @@
  */
 
 #include <linux/slab.h>
-#include <linux/vmalloc.h>
 #include <linux/delay.h>
 #include <sound/core.h>
 #include <sound/asoundef.h>
 #include "pdaudiocf.h"
 
 
-/*
- * we use a vmalloc'ed (sg-)buffer
- */
-
-/* get the physical page pointer on 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);
-}
-
-/*
- * hw_params callback
- * NOTE: this may be called not only once per pcm open!
- */
-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 enough large */
-		vfree(runtime->dma_area);
-	}
-	runtime->dma_area = vmalloc_32_user(size);
-	if (! runtime->dma_area)
-		return -ENOMEM;
-	runtime->dma_bytes = size;
-	return 0;
-}
-
-/*
- * hw_free callback
- * NOTE: this may be called not only once per pcm open!
- */
-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;
-}
-
 /*
  * clear the SRAM contents
  */
@@ -147,7 +103,8 @@ static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
 static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
 				     struct snd_pcm_hw_params *hw_params)
 {
-	return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
+	return snd_pcm_lib_alloc_vmalloc_32_buffer
+					(subs, params_buffer_bytes(hw_params));
 }
 
 /*
@@ -155,7 +112,7 @@ static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
  */
 static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
 {
-	return snd_pcm_free_vmalloc_buffer(subs);
+	return snd_pcm_lib_free_vmalloc_buffer(subs);
 }
 
 /*
@@ -319,7 +276,7 @@ static struct snd_pcm_ops pdacf_pcm_capture_ops = {
 	.prepare =	pdacf_pcm_prepare,
 	.trigger =	pdacf_pcm_trigger,
 	.pointer =	pdacf_pcm_capture_pointer,
-	.page =		snd_pcm_get_vmalloc_page,
+	.page =		snd_pcm_lib_get_vmalloc_page,
 };