D60505.1793830543.diff
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	diff --git a/sys/dev/sound/pcm/channel.c b/sys/dev/sound/pcm/channel.c
	--- a/sys/dev/sound/pcm/channel.c
	+++ b/sys/dev/sound/pcm/channel.c
	@@ -1348,6 +1348,7 @@
	{
	struct pcm_channel *c;

	+ PCM_BUSYASSERT(d);
	KASSERT(!PCM_REGISTERED(d), ("%s(): still registered\n", __func__));

	CHN_FOREACH(c, d, channels.pcm) {
	diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
	--- a/sys/dev/sound/pcm/sound.c
	+++ b/sys/dev/sound/pcm/sound.c
	@@ -411,9 +411,8 @@

	PCM_ACQUIRE(d);
	d->flags &= ~SD_F_REGISTERED;
	- PCM_RELEASE(d);
	-
	chn_shutdownall(d);
	+ PCM_RELEASE(d);

	/*
	* Destroy the dsp cdev before freeing resources, otherwise threads