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>

1 files changed, 11 insertions, 7 deletions

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 1d5797a9668..da3e1ed29b3 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/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);