ALSA: vx: 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/20191209094943.14984-9-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/vx/vx_pcm.c

@@ -772,23 +772,6 @@ static snd_pcm_uframes_t vx_pcm_playback_pointer(struct snd_pcm_substream *subs)
 	return pipe->position;
 }
 
-/*
- * vx_pcm_hw_params - hw_params callback for playback and capture
- */
-static int vx_pcm_hw_params(struct snd_pcm_substream *subs,
-				     struct snd_pcm_hw_params *hw_params)
-{
-	return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
-}
-
-/*
- * vx_pcm_hw_free - hw_free callback for playback and capture
- */
-static int vx_pcm_hw_free(struct snd_pcm_substream *subs)
-{
-	return snd_pcm_lib_free_pages(subs);
-}
-
 /*
  * vx_pcm_prepare - prepare callback for playback and capture
  */
@@ -861,8 +844,6 @@ static const struct snd_pcm_ops vx_pcm_playback_ops = {
 	.open =		vx_pcm_playback_open,
 	.close =	vx_pcm_playback_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	vx_pcm_hw_params,
-	.hw_free =	vx_pcm_hw_free,
 	.prepare =	vx_pcm_prepare,
 	.trigger =	vx_pcm_trigger,
 	.pointer =	vx_pcm_playback_pointer,
@@ -1081,8 +1062,6 @@ static const struct snd_pcm_ops vx_pcm_capture_ops = {
 	.open =		vx_pcm_capture_open,
 	.close =	vx_pcm_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	vx_pcm_hw_params,
-	.hw_free =	vx_pcm_hw_free,
 	.prepare =	vx_pcm_prepare,
 	.trigger =	vx_pcm_trigger,
 	.pointer =	vx_pcm_capture_pointer,
@@ -1230,9 +1209,9 @@ int snd_vx_pcm_new(struct vx_core *chip)
 			snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &vx_pcm_playback_ops);
 		if (ins)
 			snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &vx_pcm_capture_ops);
-		snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
-						      snd_dma_continuous_data(GFP_KERNEL | GFP_DMA32),
-						      0, 0);
+		snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
+					       snd_dma_continuous_data(GFP_KERNEL | GFP_DMA32),
+					       0, 0);
 
 		pcm->private_data = chip;
 		pcm->private_free = snd_vx_pcm_free;