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ALSA: hda_codec: Check for invalid zero connections 

To prevent "Too many connections" message and the error path for some HDMI
codecs (which makes onboard audio unusable), check for invalid zero
connections for CONNECT_LIST verb.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jaroslav Kysela 2009-07-18 11:48:19 +02:00 committed by Takashi Iwai
parent 9d30937acc
commit 2e9bf24706
1 changed files with 6 additions and 0 deletions
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6
sound/pci/hda/hda_codec.c
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@ -332,6 +332,12 @@ int snd_hda_get_connections(struct hda_codec *codec, hda_nid_t nid,
AC_VERB_GET_CONNECT_LIST, i);
range_val = !!(parm & (1 << (shift-1))); /* ranges */
val = parm & mask;
if (val == 0) {
snd_printk(KERN_WARNING "hda_codec: "
"invalid CONNECT_LIST verb %x[%i]:%x\n",
nid, i, parm);
return 0;
}
parm >>= shift;
if (range_val) {
/* ranges between the previous and this one */