From 33c878f0341d945b7176016e2ce3e6181631bbc9 Mon Sep 17 00:00:00 2001
From: Cameron Grant <cg@FreeBSD.org>
Date: Sat, 23 Sep 2000 22:00:09 +0000
Subject: [PATCH] only probe mandatory channels on known bad codecs

---
 sys/dev/sound/pcm/ac97.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/dev/sound/pcm/ac97.c b/sys/dev/sound/pcm/ac97.c
index a5aaccb6e2a7..d974bf206c6f 100644
--- a/sys/dev/sound/pcm/ac97.c
+++ b/sys/dev/sound/pcm/ac97.c
@@ -341,7 +341,8 @@ ac97_initmixer(struct ac97_info *codec)
 	}
 
 	for (i = 0; i < 32; i++) {
-		if (codec->mix[i].reg > 0) {
+		k = codec->noext? codec->mix[i].enable : 1;
+		if (k && (codec->mix[i].reg > 0)) {
 			old = rdcd(codec, codec->mix[i].reg);
 			wrcd(codec, codec->mix[i].reg, 0x3f);
 			j = rdcd(codec, codec->mix[i].reg);