ALSA: ens137x: Use managed buffer allocation

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

Link: https://lore.kernel.org/r/20191209094943.14984-38-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ens1370.c

@@ -856,17 +856,6 @@ static int snd_ensoniq_trigger(struct snd_pcm_substream *substream, int cmd)
  *  PCM part
  */
 
-static int snd_ensoniq_hw_params(struct snd_pcm_substream *substream,
-				 struct snd_pcm_hw_params *hw_params)
-{
-	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
-}
-
-static int snd_ensoniq_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
 static int snd_ensoniq_playback1_prepare(struct snd_pcm_substream *substream)
 {
 	struct ensoniq *ensoniq = snd_pcm_substream_chip(substream);
@@ -1216,8 +1205,6 @@ static const struct snd_pcm_ops snd_ensoniq_playback1_ops = {
 	.open =		snd_ensoniq_playback1_open,
 	.close =	snd_ensoniq_playback1_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_ensoniq_hw_params,
-	.hw_free =	snd_ensoniq_hw_free,
 	.prepare =	snd_ensoniq_playback1_prepare,
 	.trigger =	snd_ensoniq_trigger,
 	.pointer =	snd_ensoniq_playback1_pointer,
@@ -1227,8 +1214,6 @@ static const struct snd_pcm_ops snd_ensoniq_playback2_ops = {
 	.open =		snd_ensoniq_playback2_open,
 	.close =	snd_ensoniq_playback2_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_ensoniq_hw_params,
-	.hw_free =	snd_ensoniq_hw_free,
 	.prepare =	snd_ensoniq_playback2_prepare,
 	.trigger =	snd_ensoniq_trigger,
 	.pointer =	snd_ensoniq_playback2_pointer,
@@ -1238,8 +1223,6 @@ static const struct snd_pcm_ops snd_ensoniq_capture_ops = {
 	.open =		snd_ensoniq_capture_open,
 	.close =	snd_ensoniq_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_ensoniq_hw_params,
-	.hw_free =	snd_ensoniq_hw_free,
 	.prepare =	snd_ensoniq_capture_prepare,
 	.trigger =	snd_ensoniq_trigger,
 	.pointer =	snd_ensoniq_capture_pointer,
@@ -1274,9 +1257,8 @@ static int snd_ensoniq_pcm(struct ensoniq *ensoniq, int device)
 	strcpy(pcm->name, CHIP_NAME " DAC2/ADC");
 	ensoniq->pcm1 = pcm;
 
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-					      &ensoniq->pci->dev,
-					      64*1024, 128*1024);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
+				       &ensoniq->pci->dev, 64*1024, 128*1024);
 
 #ifdef CHIP1370
 	err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
@@ -1307,9 +1289,8 @@ static int snd_ensoniq_pcm2(struct ensoniq *ensoniq, int device)
 	strcpy(pcm->name, CHIP_NAME " DAC1");
 	ensoniq->pcm2 = pcm;
 
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-					      &ensoniq->pci->dev,
-					      64*1024, 128*1024);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
+				       &ensoniq->pci->dev, 64*1024, 128*1024);
 
 #ifdef CHIP1370
 	err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,