From 6dd9486ca9b8dde3a91e4c5231b8c83df27ba753 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 9 Dec 2019 10:49:42 +0100
Subject: [PATCH] ALSA: usb-audio: Use managed buffer allocation
Git-commit: 6dd9486ca9b8dde3a91e4c5231b8c83df27ba753
Patch-mainline: v5.6-rc1
References: bsc#1178203

Clean up the driver 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/20191209094943.14984-71-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/usb/pcm.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 9c8930bb00c8..7caaa04ae546 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -785,11 +785,6 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 	if (ret)
 		return ret;
 
-	ret = snd_pcm_lib_malloc_pages(substream,
-				       params_buffer_bytes(hw_params));
-	if (ret < 0)
-		goto stop_pipeline;
-
 	subs->pcm_format = params_format(hw_params);
 	subs->period_bytes = params_period_bytes(hw_params);
 	subs->period_frames = params_period_size(hw_params);
@@ -853,7 +848,7 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 		snd_usb_unlock_shutdown(subs->stream->chip);
 	}
 
-	return snd_pcm_lib_free_pages(substream);
+	return 0;
 }
 
 /*
@@ -1803,9 +1798,9 @@ void snd_usb_preallocate_buffer(struct snd_usb_substream *subs)
 	struct device *dev = subs->dev->bus->controller;
 
 	if (snd_usb_use_vmalloc)
-		snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_VMALLOC,
-					      NULL, 0, 0);
+		snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC,
+					   NULL, 0, 0);
 	else
-		snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_DEV_SG,
-					      dev, 64*1024, 512*1024);
+		snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG,
+					   dev, 64*1024, 512*1024);
 }
-- 
2.16.4