D59109.1794117228.diff
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	diff --git a/sys/dev/sound/pcm/mixer.c b/sys/dev/sound/pcm/mixer.c
	--- a/sys/dev/sound/pcm/mixer.c
	+++ b/sys/dev/sound/pcm/mixer.c
	@@ -698,22 +698,16 @@
	struct snd_mixer *m;

	m = oidp->oid_arg1;
	- mtx_lock(m->lock);
	strlcpy(devname, snd_mixernames[m->hwvol_mixer], sizeof(devname));
	- mtx_unlock(m->lock);
	error = sysctl_handle_string(oidp, &devname[0], sizeof(devname), req);
	- mtx_lock(m->lock);
	if (error == 0 && req->newptr != NULL) {
	- dev = mixer_lookup(devname);
	- if (dev == -1) {
	- mtx_unlock(m->lock);
	- return EINVAL;
	- } else {
	- m->hwvol_mixer = dev;
	- }
	+ if ((dev = mixer_lookup(devname)) == -1)
	+ return (EINVAL);
	+ mtx_lock(m->lock);
	+ m->hwvol_mixer = dev;
	+ mtx_unlock(m->lock);
	}
	- mtx_unlock(m->lock);
	- return error;
	+ return (error);
	}

	int