linux-kernel - [PATCH 3/3] ALSA: es1968: Use common error handling code in snd_es1968_capture

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Date:   Wed, 15 Nov 2017 10:30:37 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     alsa-devel@...a-project.org, Bhumika Goyal <bhumirks@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 3/3] ALSA: es1968: Use common error handling code in
 snd_es1968_capture_open()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 15 Nov 2017 09:30:00 +0100

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

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 sound/pci/es1968.c | 31 +++++++++++++++++--------------
 1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c
index 7777ec583e20..fc45fab258c1 100644
--- a/sound/pci/es1968.c
+++ b/sound/pci/es1968.c
@@ -1589,23 +1589,20 @@ static int snd_es1968_capture_open(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct es1968 *chip = snd_pcm_substream_chip(substream);
 	struct esschan *es;
-	int apu1, apu2;
+	int apu1, apu2, rc;
 
 	apu1 = snd_es1968_alloc_apu_pair(chip, ESM_APU_PCM_CAPTURE);
 	if (apu1 < 0)
 		return apu1;
 	apu2 = snd_es1968_alloc_apu_pair(chip, ESM_APU_PCM_RATECONV);
 	if (apu2 < 0) {
-		snd_es1968_free_apu_pair(chip, apu1);
-		return apu2;
+		rc = apu2;
+		goto free_first_pair;
 	}
 	
 	es = kzalloc(sizeof(*es), GFP_KERNEL);
-	if (!es) {
-		snd_es1968_free_apu_pair(chip, apu1);
-		snd_es1968_free_apu_pair(chip, apu2);
-		return -ENOMEM;
-	}
+	if (!es)
+		goto e_nomem;
 
 	es->apu[0] = apu1;
 	es->apu[1] = apu1 + 1;
@@ -1621,12 +1618,9 @@ static int snd_es1968_capture_open(struct snd_pcm_substream *substream)
 
 	/* get mixbuffer */
 	es->mixbuf = snd_es1968_new_memory(chip, ESM_MIXBUF_SIZE);
-	if (!es->mixbuf) {
-		snd_es1968_free_apu_pair(chip, apu1);
-		snd_es1968_free_apu_pair(chip, apu2);
-		kfree(es);
-                return -ENOMEM;
-        }
+	if (!es->mixbuf)
+		goto free_data;
+
 	memset(es->mixbuf->buf.area, 0, ESM_MIXBUF_SIZE);
 
 	runtime->private_data = es;
@@ -1640,6 +1634,15 @@ static int snd_es1968_capture_open(struct snd_pcm_substream *substream)
 	spin_unlock_irq(&chip->substream_lock);
 
 	return 0;
+
+free_data:
+	kfree(es);
+e_nomem:
+	rc = -ENOMEM;
+	snd_es1968_free_apu_pair(chip, apu2);
+free_first_pair:
+	snd_es1968_free_apu_pair(chip, apu1);
+	return rc;
 }
 
 static int snd_es1968_playback_close(struct snd_pcm_substream *substream)
-- 
2.15.0