From 1865211d6789e8404c75278754f0fa4735165600 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 23 Nov 2020 09:53:15 +0100
Subject: [PATCH 09/41] ALSA: usb-audio: Move snd_usb_autoresume() call out of setup_hw_info()
References: bsc#1178203
Patch-mainline: v5.11-rc1
Git-commit: 1865211d6789e8404c75278754f0fa4735165600

This is a preliminary work for the upcoming hw-constraint change for
the implicit feedback mode.

Currently snd_usb_autoresume() is called at the end of
setup_hwinfo().  It's a bit confusing; because of this implicit
refcount usage, the caller side needs to call snd_usb_autosuspend()
later in the error path although it's not seen inside the function.
Instead, it's clearer to call both snd_usb_autoresume() and suspend()
in the very same function.

It's only refactoring and no functional changes.

Tested-by: Keith Milner <kamilner@superlative.org>
Tested-by: Dylan Robinson <dylan_robinson@motu.com>
Link: https://lore.kernel.org/r/20201123085347.19667-10-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/usb/pcm.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index fea2764163b4..78933b6571d0 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -1378,7 +1378,7 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
 			return err;
 	}
 
-	return snd_usb_autoresume(subs->stream->chip);
+	return 0;
 }
 
 static int snd_usb_pcm_open(struct snd_pcm_substream *substream)
@@ -1402,11 +1402,14 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream)
 	subs->dsd_dop.marker = 1;
 
 	ret = setup_hw_info(runtime, subs);
-	if (ret == 0) {
-		ret = snd_media_stream_init(subs, as->pcm, direction);
-		if (ret)
-			snd_usb_autosuspend(subs->stream->chip);
-	}
+	if (ret < 0)
+		return ret;
+	ret = snd_usb_autoresume(subs->stream->chip);
+	if (ret < 0)
+		return ret;
+	ret = snd_media_stream_init(subs, as->pcm, direction);
+	if (ret < 0)
+		snd_usb_autosuspend(subs->stream->chip);
 	return ret;
 }
 
-- 
2.16.4