diff --git a/MAINTAINERS b/MAINTAINERS
index c2066f4c3286..6d383ec8325a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7479,6 +7479,13 @@ F:	drivers/rtc/
 F:	include/linux/rtc.h
 F:	include/uapi/linux/rtc.h
 
+REALTEK AUDIO CODECS
+M:	Bard Liao <bardliao@realtek.com>
+M:	Oder Chiou <oder_chiou@realtek.com>
+S:	Maintained
+F:	sound/soc/codecs/rt*
+F:	include/sound/rt*.h
+
 REISERFS FILE SYSTEM
 L:	reiserfs-devel@vger.kernel.org
 S:	Supported
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 50ff6f3459aa..27ed5ccb174a 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -248,6 +248,8 @@
 	.info = snd_soc_info_enum_double, \
 	.get = xhandler_get, .put = xhandler_put, \
 	.private_value = (unsigned long)&xenum }
+#define SOC_VALUE_ENUM_EXT(xname, xenum, xhandler_get, xhandler_put) \
+	SOC_ENUM_EXT(xname, xenum, xhandler_get, xhandler_put)
 
 #define SND_SOC_BYTES(xname, xbase, xregs)		      \
 {	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,   \
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 28caa63ae526..2d6c8b86b7d3 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -4518,9 +4518,16 @@ EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
 			       const char *propname)
 {
-	struct device_node *np = card->dev->of_node;
+	struct device_node *np;
 	int ret;
 
+	if (!card->dev) {
+		pr_err("card->dev is not set before calling %s\n", __func__);
+		return -EINVAL;
+	}
+
+	np = card->dev->of_node;
+
 	ret = of_property_read_string_index(np, propname, 0, &card->name);
 	/*
 	 * EINVAL means the property does not exist. This is fine providing