From 4881bda5ea05c8c240fc8afeaa928e2bc43f61fa Mon Sep 17 00:00:00 2001
From: Yang Yingliang <yangyingliang@huawei.com>
Date: Wed, 19 Oct 2022 17:30:25 +0800
Subject: [PATCH] ALSA: ac97: fix possible memory leak in snd_ac97_dev_register()
Git-commit: 4881bda5ea05c8c240fc8afeaa928e2bc43f61fa
Patch-mainline: v6.1-rc3
References: git-fixes

If device_register() fails in snd_ac97_dev_register(), it should
call put_device() to give up reference, or the name allocated in
dev_set_name() is leaked.

Fixes: 0ca06a00e206 ("[ALSA] AC97 bus interface for ad-hoc drivers")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221019093025.1179475-1-yangyingliang@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/pci/ac97/ac97_codec.c |    1 +
 1 file changed, 1 insertion(+)

--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -1946,6 +1946,7 @@ static int snd_ac97_dev_register(struct
 		     snd_ac97_get_short_name(ac97));
 	if ((err = device_register(&ac97->dev)) < 0) {
 		ac97_err(ac97, "Can't register ac97 bus\n");
+		put_device(&ac97->dev);
 		ac97->dev.bus = NULL;
 		return err;
 	}