ALSA: hda - Fix snd_hda_get_num_raw_conns() to return a correct value
In the connection list expansion in hda_codec.c and hda_proc.c, the
value returned from snd_hda_get_num_raw_conns() is used as the array
size to store the connection list. However, the function returns
simply a raw value of the AC_PAR_CONNLIST_LEN parameter, and the
widget list with ranges isn't considered there. Thus it may return a
smaller size than the actual list, which results in -ENOSPC in
snd_hda_get_raw_conections().
This patch fixes the bug by parsing the connection list correctly also
for snd_hda_get_num_raw_conns().
Reported-and-tested-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 97c68dd..a9ebcf9 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -494,7 +494,7 @@
int snd_hda_get_num_raw_conns(struct hda_codec *codec, hda_nid_t nid)
{
- return get_num_conns(codec, nid) & AC_CLIST_LENGTH;
+ return snd_hda_get_raw_connections(codec, nid, NULL, 0);
}
/**
@@ -517,9 +517,6 @@
hda_nid_t prev_nid;
int null_count = 0;
- if (snd_BUG_ON(!conn_list || max_conns <= 0))
- return -EINVAL;
-
parm = get_num_conns(codec, nid);
if (!parm)
return 0;
@@ -545,7 +542,8 @@
AC_VERB_GET_CONNECT_LIST, 0);
if (parm == -1 && codec->bus->rirb_error)
return -EIO;
- conn_list[0] = parm & mask;
+ if (conn_list)
+ conn_list[0] = parm & mask;
return 1;
}
@@ -580,14 +578,20 @@
continue;
}
for (n = prev_nid + 1; n <= val; n++) {
- if (conns >= max_conns)
- return -ENOSPC;
- conn_list[conns++] = n;
+ if (conn_list) {
+ if (conns >= max_conns)
+ return -ENOSPC;
+ conn_list[conns] = n;
+ }
+ conns++;
}
} else {
- if (conns >= max_conns)
- return -ENOSPC;
- conn_list[conns++] = val;
+ if (conn_list) {
+ if (conns >= max_conns)
+ return -ENOSPC;
+ conn_list[conns] = val;
+ }
+ conns++;
}
prev_nid = val;
}