Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Zhouyang Jia <jiazhouyang09@gmail.com>
Cc:     Zhouyang Jia <jiazhouyang09@gmail.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Bhumika Goyal <bhumirks@gmail.com>,
        alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ALSA: sonicvibes: add error handling for snd_ctl_add
Date:   Mon, 11 Jun 2018 16:08:40 +0800
Message-Id: <1528704521-34060-1-git-send-email-jiazhouyang09@gmail.com>
To:     unlisted-recipients:; (no To-header on input)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

When snd_ctl_add fails, the lack of error-handling code may
cause unexpected results.

This patch adds error-handling code after calling snd_ctl_add.

Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
---
 sound/pci/sonicvibes.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/pci/sonicvibes.c b/sound/pci/sonicvibes.c
index a8abb15..57cb77a 100644
--- a/sound/pci/sonicvibes.c
+++ b/sound/pci/sonicvibes.c
@@ -1188,6 +1188,7 @@ SONICVIBES_SINGLE("Joystick Speed", 0, SV_IREG_GAME_PORT, 1, 15, 0);
 static int snd_sonicvibes_create_gameport(struct sonicvibes *sonic)
 {
 	struct gameport *gp;
+	int err;
 
 	sonic->gameport = gp = gameport_allocate_port();
 	if (!gp) {
@@ -1203,7 +1204,10 @@ static int snd_sonicvibes_create_gameport(struct sonicvibes *sonic)
 
 	gameport_register_port(gp);
 
-	snd_ctl_add(sonic->card, snd_ctl_new1(&snd_sonicvibes_game_control, sonic));
+	err = snd_ctl_add(sonic->card,
+		snd_ctl_new1(&snd_sonicvibes_game_control, sonic));
+	if (err < 0)
+		return err;
 
 	return 0;
 }
-- 
2.7.4