ALSA: hda: Use managed buffer allocation

Clean up the common driver module with the new managed buffer
allocation API.  The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.

Link: https://lore.kernel.org/r/20191209094943.14984-41-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_controller.c

@@ -107,7 +107,7 @@ static int azx_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
 	struct azx *chip = apcm->chip;
 	struct azx_dev *azx_dev = get_azx_dev(substream);
-	int ret;
+	int ret = 0;
 
 	trace_azx_pcm_hw_params(chip, azx_dev);
 	dsp_lock(azx_dev);
@@ -119,8 +119,6 @@ static int azx_pcm_hw_params(struct snd_pcm_substream *substream,
 	azx_dev->core.bufsize = 0;
 	azx_dev->core.period_bytes = 0;
 	azx_dev->core.format_val = 0;
-	ret = snd_pcm_lib_malloc_pages(substream,
-				       params_buffer_bytes(hw_params));
 
 unlock:
 	dsp_unlock(azx_dev);
@@ -132,7 +130,6 @@ static int azx_pcm_hw_free(struct snd_pcm_substream *substream)
 	struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
 	struct azx_dev *azx_dev = get_azx_dev(substream);
 	struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
-	int err;
 
 	/* reset BDL address */
 	dsp_lock(azx_dev);
@@ -141,10 +138,9 @@ static int azx_pcm_hw_free(struct snd_pcm_substream *substream)
 
 	snd_hda_codec_cleanup(apcm->codec, hinfo, substream);
 
-	err = snd_pcm_lib_free_pages(substream);
 	azx_stream(azx_dev)->prepared = 0;
 	dsp_unlock(azx_dev);
-	return err;
+	return 0;
 }
 
 static int azx_pcm_prepare(struct snd_pcm_substream *substream)
@@ -766,9 +762,8 @@ int snd_hda_attach_pcm_stream(struct hda_bus *_bus, struct hda_codec *codec,
 		size = MAX_PREALLOC_SIZE;
 	if (chip->uc_buffer)
 		type = SNDRV_DMA_TYPE_DEV_UC_SG;
-	snd_pcm_lib_preallocate_pages_for_all(pcm, type,
-					      chip->card->dev,
-					      size, MAX_PREALLOC_SIZE);
+	snd_pcm_set_managed_buffer_all(pcm, type, chip->card->dev,
+				       size, MAX_PREALLOC_SIZE);
 	return 0;
 }