[PATCH 4.9 40/44] ALSA: aoa: i2sbus: fix possible memory leak in i2sbus_add_dev()

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

From: Yang Yingliang <yangyingliang@huawei.com>

[ Upstream commit 4a4c8482e370d697738a78dcd7bf2780832cb712 ]

dev_set_name() in soundbus_add_one() allocates memory for name, it need be
freed when of_device_register() fails, call soundbus_dev_put() to give up
the reference that hold in device_initialize(), so that it can be freed in
kobject_cleanup() when the refcount hit to 0. And other resources are also
freed in i2sbus_release_dev(), so it can return 0 directly.

Fixes: f3d9478b2ce4 ("[ALSA] snd-aoa: add snd-aoa")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221027013438.991920-1-yangyingliang@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/aoa/soundbus/i2sbus/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/aoa/soundbus/i2sbus/core.c b/sound/aoa/soundbus/i2sbus/core.c
index 000b58522106..c016df586992 100644
--- a/sound/aoa/soundbus/i2sbus/core.c
+++ b/sound/aoa/soundbus/i2sbus/core.c
@@ -302,6 +302,10 @@ static int i2sbus_add_dev(struct macio_dev *macio,
 
 	if (soundbus_add_one(&dev->sound)) {
 		printk(KERN_DEBUG "i2sbus: device registration error!\n");
+		if (dev->sound.ofdev.dev.kobj.state_initialized) {
+			soundbus_dev_put(&dev->sound);
+			return 0;
+		}
 		goto err;
 	}
 
-- 
2.35.1