[PATCH v3 1/2] ASoC: Intel: Skylake: fix possible memory leak in skl_codec_device_init()

[Yang Yingliang]

If snd_hdac_device_register() fails, 'codec' and name allocated in
dev_set_name() called in snd_hdac_device_init() are leaked. Fix this
by calling put_device(), so they can be freed in snd_hda_codec_dev_release()
and kobject_cleanup().

Fixes: e4746d94d00c ("ASoC: Intel: Skylake: Introduce HDA codec init and exit routines")
Fixes: dfe66a18780d ("ALSA: hdac_ext: add extended HDA bus")
Suggested-by: Cezary Rojewski <cezary.rojewski at intel.com>
Signed-off-by: Yang Yingliang <yangyingliang at huawei.com>
---
v2 -> v3:
  add suggest tag

v1 -> v2:
  remove skl_codec_device_exit() and use snd_hda_codec_dev_release() to fix leak
---
 sound/soc/intel/skylake/skl.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index bbba2df33aaf..3312b57e3c0c 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -689,11 +689,6 @@ static void load_codec_module(struct hda_codec *codec)
 
 #endif /* CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC */
 
-static void skl_codec_device_exit(struct device *dev)
-{
-	snd_hdac_device_exit(dev_to_hdac_dev(dev));
-}
-
 static struct hda_codec *skl_codec_device_init(struct hdac_bus *bus, int addr)
 {
 	struct hda_codec *codec;
@@ -706,12 +701,11 @@ static struct hda_codec *skl_codec_device_init(struct hdac_bus *bus, int addr)
 	}
 
 	codec->core.type = HDA_DEV_ASOC;
-	codec->core.dev.release = skl_codec_device_exit;
 
 	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