linux-kernel - [PATCH 1/6] ALSA: pcm: Use common error handling code in _snd_pcm

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Date:   Wed, 23 Aug 2017 10:23:23 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     alsa-devel@...a-project.org, Arnd Bergmann <arnd@...db.de>,
        Arvind Yadav <arvind.yadav.cs@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Ingo Molnar <mingo@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
        Takashi Sakamoto <o-takashi@...amocchi.jp>,
        Vegard Nossum <vegard.nossum@...cle.com>
Cc:     kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/6] ALSA: pcm: Use common error handling code in
 _snd_pcm_new()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 23 Aug 2017 08:40:37 +0200

Add a jump target so that a bit of exception handling can be better reused
at the end of this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 sound/core/pcm.c | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 89c7485519cb..048df9658f50 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -783,21 +783,27 @@ static int _snd_pcm_new(struct snd_card *card, const char *id, int device,
 	INIT_LIST_HEAD(&pcm->list);
 	if (id)
 		strlcpy(pcm->id, id, sizeof(pcm->id));
-	if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) {
-		snd_pcm_free(pcm);
-		return err;
-	}
-	if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) {
-		snd_pcm_free(pcm);
-		return err;
-	}
-	if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) {
-		snd_pcm_free(pcm);
-		return err;
-	}
+
+	err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+				 playback_count);
+	if (err < 0)
+		goto free_pcm;
+
+	err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count);
+	if (err < 0)
+		goto free_pcm;
+
+	err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops);
+	if (err < 0)
+		goto free_pcm;
+
 	if (rpcm)
 		*rpcm = pcm;
 	return 0;
+
+free_pcm:
+	snd_pcm_free(pcm);
+	return err;
 }
 
 /**
-- 
2.14.0