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authorJaroslav Kysela <perex@perex.cz>2009-07-18 11:48:19 +0200
committerTakashi Iwai <tiwai@suse.de>2009-07-19 13:51:45 +0200
commit2e9bf247066a293ebcd4672ddd487808ab5f2d1b (patch)
tree3cddcbd7842ce3629cc6783d138378cc4fe4f889
parent9d30937accf2c01e8b0bd59787409a7348cbbcb7 (diff)
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>
-rw-r--r--sound/pci/hda/hda_codec.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 26d255de6be..88480c0c58a 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -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 */