1 files changed, 54 insertions, 5 deletions

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 897a2cbef6de..78d1cad08a0a 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -728,7 +728,11 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 	struct audioformat *fmt;
 	int ret;
 
-	ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
+	if (snd_usb_use_vmalloc)
+		ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
+						       params_buffer_bytes(hw_params));
+	else
+		ret = snd_pcm_lib_malloc_pages(substream,
 					       params_buffer_bytes(hw_params));
 	if (ret < 0)
 		return ret;
@@ -781,7 +785,11 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 		snd_usb_endpoint_deactivate(subs->data_endpoint);
 		snd_usb_unlock_shutdown(subs->stream->chip);
 	}
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
+
+	if (snd_usb_use_vmalloc)
+		return snd_pcm_lib_free_vmalloc_buffer(substream);
+	else
+		return snd_pcm_lib_free_pages(substream);
 }
 
 /*
@@ -1702,9 +1710,50 @@ static const struct snd_pcm_ops snd_usb_capture_ops = {
 	.mmap =		snd_pcm_lib_mmap_vmalloc,
 };
 
+static const struct snd_pcm_ops snd_usb_playback_dev_ops = {
+	.open =		snd_usb_pcm_open,
+	.close =	snd_usb_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_usb_hw_params,
+	.hw_free =	snd_usb_hw_free,
+	.prepare =	snd_usb_pcm_prepare,
+	.trigger =	snd_usb_substream_playback_trigger,
+	.pointer =	snd_usb_pcm_pointer,
+	.page =		snd_pcm_sgbuf_ops_page,
+};
+
+static const struct snd_pcm_ops snd_usb_capture_dev_ops = {
+	.open =		snd_usb_pcm_open,
+	.close =	snd_usb_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_usb_hw_params,
+	.hw_free =	snd_usb_hw_free,
+	.prepare =	snd_usb_pcm_prepare,
+	.trigger =	snd_usb_substream_capture_trigger,
+	.pointer =	snd_usb_pcm_pointer,
+	.page =		snd_pcm_sgbuf_ops_page,
+};
+
 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
 {
-	snd_pcm_set_ops(pcm, stream,
-			stream == SNDRV_PCM_STREAM_PLAYBACK ?
-			&snd_usb_playback_ops : &snd_usb_capture_ops);
+	const struct snd_pcm_ops *ops;
+
+	if (snd_usb_use_vmalloc)
+		ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
+			&snd_usb_playback_ops : &snd_usb_capture_ops;
+	else
+		ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
+			&snd_usb_playback_dev_ops : &snd_usb_capture_dev_ops;
+	snd_pcm_set_ops(pcm, stream, ops);
+}
+
+void snd_usb_preallocate_buffer(struct snd_usb_substream *subs)
+{
+	struct snd_pcm *pcm = subs->stream->pcm;
+	struct snd_pcm_substream *s = pcm->streams[subs->direction].substream;
+	struct device *dev = subs->dev->bus->controller;
+
+	if (!snd_usb_use_vmalloc)
+		snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_DEV_SG,
+					      dev, 64*1024, 512*1024);
 }