ALSA: hda_generic: do not read connections for widged with an unknown type

Reading node connections for an unknown widget can confuse HDA codec bus.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -121,11 +121,17 @@ static int add_new_node(struct hda_codec *codec, struct hda_gspec *spec, hda_nid
 	if (node == NULL)
 		return -ENOMEM;
 	node->nid = nid;
-	nconns = snd_hda_get_connections(codec, nid, conn_list,
-					 HDA_MAX_CONNECTIONS);
-	if (nconns < 0) {
-		kfree(node);
-		return nconns;
+	node->wid_caps = get_wcaps(codec, nid);
+	node->type = (node->wid_caps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
+	if (node->type <= AC_WID_BEEP || node->type == AC_WID_VENDOR) {
+		nconns = snd_hda_get_connections(codec, nid, conn_list,
+						 HDA_MAX_CONNECTIONS);
+		if (nconns < 0) {
+			kfree(node);
+			return nconns;
+		}
+	} else {
+		nconns = 0;
 	}
 	if (nconns <= ARRAY_SIZE(node->slist))
 		node->conn_list = node->slist;
@@ -140,8 +146,6 @@ static int add_new_node(struct hda_codec *codec, struct hda_gspec *spec, hda_nid
 	}
 	memcpy(node->conn_list, conn_list, nconns * sizeof(hda_nid_t));
 	node->nconns = nconns;
-	node->wid_caps = get_wcaps(codec, nid);
-	node->type = (node->wid_caps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
 
 	if (node->type == AC_WID_PIN) {
 		node->pin_caps = snd_hda_query_pin_caps(codec, node->nid);