ASoC: ak4642: fix a memory leak if failed to initialise AK4642

ak4642 should be kfreed if ak4642_init() return error.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Reviewed-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/ak4642.c b/sound/soc/codecs/ak4642.c
index 60b83b4..3d7dc55 100644
--- a/sound/soc/codecs/ak4642.c
+++ b/sound/soc/codecs/ak4642.c
@@ -498,8 +498,10 @@
 	codec->control_data = i2c;
 
 	ret = ak4642_init(ak4642);
-	if (ret < 0)
+	if (ret < 0) {
 		printk(KERN_ERR "failed to initialise AK4642\n");
+		kfree(ak4642);
+	}
 
 	return ret;
 }