[v2] ALSA: sonicvibes: add error handling for snd_ctl_add
diff mbox

Message ID 1528975341-51696-1-git-send-email-jiazhouyang09@gmail.com
State New
Headers show

Commit Message

Zhouyang Jia June 14, 2018, 11:22 a.m. UTC
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>
---
v1->v2:
- Check the return value of snd_sonicvibes_create_gameport.
---
 sound/pci/sonicvibes.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

Patch
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diff --git a/sound/pci/sonicvibes.c b/sound/pci/sonicvibes.c
index a8abb15..75225b04 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;
 }
@@ -1515,7 +1519,10 @@  static int snd_sonic_probe(struct pci_dev *pci,
 		return err;
 	}
 
-	snd_sonicvibes_create_gameport(sonic);
+	if ((err = snd_sonicvibes_create_gameport(sonic)) < 0) {
+		snd_card_free(card);
+		return err;
+        }
 
 	if ((err = snd_card_register(card)) < 0) {
 		snd_card_free(card);