[PATCH] ASoC: Intel: Skylake: fix possible memory leak in skl_codec_device_init()

[Yang Yingliang]

If snd_hdac_device_register() fails, 'codec' is leaked, free it
in snd_hdac_device_exit(). And device_initialize() is called in
snd_hdac_device_init(), it should call put_device() to give up
reference or the name allocated in dev_set_name() is leaked.
The snd_hdac_device_exit() will be called in dev->release().

Fixes: e4746d94d00c ("ASoC: Intel: Skylake: Introduce HDA codec init and exit routines")
Signed-off-by: Yang Yingliang <yangyingliang at huawei.com>
---
 sound/soc/intel/skylake/skl.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index bbba2df33aaf..f0048e3fa619 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -691,7 +691,11 @@ static void load_codec_module(struct hda_codec *codec)
 
 static void skl_codec_device_exit(struct device *dev)
 {
-	snd_hdac_device_exit(dev_to_hdac_dev(dev));
+	struct hdac_device *hdac_dev = dev_to_hdac_dev(dev);
+	struct hda_codec *codec = container_of(hdac_dev, struct hda_codec, core);
+
+	snd_hdac_device_exit(hdac_dev);
+	kfree(codec);
 }
 
 static struct hda_codec *skl_codec_device_init(struct hdac_bus *bus, int addr)
@@ -711,7 +715,7 @@ static struct hda_codec *skl_codec_device_init(struct hdac_bus *bus, int addr)
 	ret = snd_hdac_device_register(&codec->core);
 	if (ret) {
 		dev_err(bus->dev, "failed to register hdac device\n");
-		snd_hdac_device_exit(&codec->core);
+		put_device(&codec->core.dev);
 		return ERR_PTR(ret);
 	}
 
-- 
2.25.1