D48435.diff
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	diff --git a/sys/dev/sound/pcm/vchan.c b/sys/dev/sound/pcm/vchan.c
	--- a/sys/dev/sound/pcm/vchan.c
	+++ b/sys/dev/sound/pcm/vchan.c
	@@ -497,9 +497,7 @@
	KASSERT(direction == c->direction, ("%s(): invalid direction %d/%d",
	__func__, direction, c->direction));

	- CHN_LOCK(c);
	- newspd = c->speed;
	- CHN_UNLOCK(c);
	+ newspd = *vchanrate;

	ret = sysctl_handle_int(oidp, &newspd, 0, req);
	if (ret != 0 \|\| req->newptr == NULL) {
	@@ -530,7 +528,6 @@

	ret = chn_reset(c, c->format, newspd);
	if (ret == 0) {
	- *vchanrate = c->speed;
	if (restart != 0) {
	CHN_FOREACH(ch, c, children.busy) {
	CHN_LOCK(ch);
	@@ -543,6 +540,7 @@
	}
	}
	}
	+ *vchanrate = c->speed;

	CHN_UNLOCK(c);

	@@ -605,15 +603,11 @@
	KASSERT(direction == c->direction, ("%s(): invalid direction %d/%d",
	__func__, direction, c->direction));

	- CHN_LOCK(c);
	-
	bzero(fmtstr, sizeof(fmtstr));

	- if (snd_afmt2str(c->format, fmtstr, sizeof(fmtstr)) != c->format)
	+ if (snd_afmt2str(vchanformat, fmtstr, sizeof(fmtstr)) != vchanformat)
	strlcpy(fmtstr, "<ERROR>", sizeof(fmtstr));

	- CHN_UNLOCK(c);
	-
	ret = sysctl_handle_string(oidp, fmtstr, sizeof(fmtstr), req);
	if (ret != 0 \|\| req->newptr == NULL) {
	PCM_RELEASE_QUICK(d);
	@@ -637,7 +631,6 @@

	ret = chn_reset(c, newfmt, c->speed);
	if (ret == 0) {
	- *vchanformat = c->format;
	if (restart != 0) {
	CHN_FOREACH(ch, c, children.busy) {
	CHN_LOCK(ch);
	@@ -650,6 +643,7 @@
	}
	}
	}
	+ *vchanformat = c->format;

	CHN_UNLOCK(c);