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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>
This commit is contained in:
Jaroslav Kysela 2009-07-22 14:38:58 +02:00 committed by Takashi Iwai
parent 1c20930a41
commit 0529604838
1 changed files with 11 additions and 7 deletions
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18
sound/pci/hda/hda_generic.c
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@ -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);