ALSA: wss: Use managed buffer allocation

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

Link: https://lore.kernel.org/r/20191209094943.14984-17-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/wss/wss_lib.c

@@ -982,10 +982,7 @@ static int snd_wss_playback_hw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_wss *chip = snd_pcm_substream_chip(substream);
 	unsigned char new_pdfr;
-	int err;
 
-	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
-		return err;
 	new_pdfr = snd_wss_get_format(chip, params_format(hw_params),
 				params_channels(hw_params)) |
 				snd_wss_get_rate(params_rate(hw_params));
@@ -993,11 +990,6 @@ static int snd_wss_playback_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static int snd_wss_playback_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
 static int snd_wss_playback_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_wss *chip = snd_pcm_substream_chip(substream);
@@ -1025,10 +1017,7 @@ static int snd_wss_capture_hw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_wss *chip = snd_pcm_substream_chip(substream);
 	unsigned char new_cdfr;
-	int err;
 
-	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
-		return err;
 	new_cdfr = snd_wss_get_format(chip, params_format(hw_params),
 			   params_channels(hw_params)) |
 			   snd_wss_get_rate(params_rate(hw_params));
@@ -1036,11 +1025,6 @@ static int snd_wss_capture_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static int snd_wss_capture_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
 static int snd_wss_capture_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_wss *chip = snd_pcm_substream_chip(substream);
@@ -1889,7 +1873,6 @@ static const struct snd_pcm_ops snd_wss_playback_ops = {
 	.close =	snd_wss_playback_close,
 	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_wss_playback_hw_params,
-	.hw_free =	snd_wss_playback_hw_free,
 	.prepare =	snd_wss_playback_prepare,
 	.trigger =	snd_wss_trigger,
 	.pointer =	snd_wss_playback_pointer,
@@ -1900,7 +1883,6 @@ static const struct snd_pcm_ops snd_wss_capture_ops = {
 	.close =	snd_wss_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_wss_capture_hw_params,
-	.hw_free =	snd_wss_capture_hw_free,
 	.prepare =	snd_wss_capture_prepare,
 	.trigger =	snd_wss_trigger,
 	.pointer =	snd_wss_capture_pointer,
@@ -1927,8 +1909,7 @@ int snd_wss_pcm(struct snd_wss *chip, int device)
 		pcm->info_flags |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 	strcpy(pcm->name, snd_wss_chip_id(chip));
 
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-					      chip->card->dev,
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, chip->card->dev,
 				       64*1024, chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);
 
 	chip->pcm = pcm;