linux-kernel - [PATCH] ALSA: Fix uninintialized error return

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Message-Id: <1435594222-17690-1-git-send-email-colin.king@canonical.com>
Date:	Mon, 29 Jun 2015 17:10:22 +0100
From:	Colin King <colin.king@...onical.com>
To:	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Mark Brown <broonie@...nel.org>, Jie Yang <yang.jie@...el.com>,
	alsa-devel@...a-project.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] ALSA: Fix uninintialized error return

From: Colin Ian King <colin.king@...onical.com>

Static analysis with cppcheck found the following error:
  [sound/core/init.c:118]: (error) Uninitialized variable: err

..this was introduced by commit 2471b6c80a70e80de69f5ff4c37187c3912e5874
("ALSA: info: Register proc entries recursively, too") where the call
to snd_info_card_register was removed and no longer setting the error
return in err.  When snd_info_create_card_entry fails to allocate a
an entry, the error path exits with garbage in err.  Fix is to return
-ENOMEM if entry fails to be allocated.

Author: Takashi Iwai <tiwai@...e.de>
Date:   Mon May 18 09:20:24 2015 +0200

Fixes: 2471b6c80a ("ALSA: info: Register proc entries recursively, too")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 sound/core/init.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sound/core/init.c b/sound/core/init.c
index 3e0ceba..20f37fb 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -109,13 +109,12 @@ static void snd_card_id_read(struct snd_info_entry *entry,
 
 static int init_info_for_card(struct snd_card *card)
 {
-	int err;
 	struct snd_info_entry *entry;
 
 	entry = snd_info_create_card_entry(card, "id", card->proc_root);
 	if (!entry) {
 		dev_dbg(card->dev, "unable to create card entry\n");
-		return err;
+		return -ENOMEM;
 	}
 	entry->c.text.read = snd_card_id_read;
 	card->proc_id = entry;
-- 
2.1.4

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