ALSA: ac97: Fix double free of ac97_codec_device

put_device will call ac97_codec_release to free
ac97_codec_device and other resources, so remove the kfree
and other redundant code.

Fixes: 74426fbf ("ALSA: ac97: add an ac97 bus")
Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/ac97/bus.c

@@ -122,17 +122,12 @@ static int ac97_codec_add(struct ac97_controller *ac97_ctrl, int idx,
 						      vendor_id);
 
 	ret = device_add(&codec->dev);
-	if (ret)
-		goto err_free_codec;
-
-	return 0;
-err_free_codec:
-	of_node_put(codec->dev.of_node);
+	if (ret) {
 		put_device(&codec->dev);
-	kfree(codec);
-	ac97_ctrl->codecs[idx] = NULL;
-
 		return ret;
+	}
+
+	return 0;
 }
 
 unsigned int snd_ac97_bus_scan_one(struct ac97_controller *adrv,