D57009.id.diff
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D57009.id.diff
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	diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
	--- a/sys/dev/sound/pcm/dsp.c
	+++ b/sys/dev/sound/pcm/dsp.c
	@@ -1877,24 +1877,25 @@

	ret = 0;

	- dsp_lock_chans(priv, FREAD \| FWRITE);
	wrch = priv->wrch;
	rdch = priv->rdch;

	if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
	+ CHN_LOCK(wrch);
	e = (events & (POLLOUT \| POLLWRNORM));
	if (e)
	ret \|= chn_poll(wrch, e, td);
	+ CHN_UNLOCK(wrch);
	}

	if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
	+ CHN_LOCK(rdch);
	e = (events & (POLLIN \| POLLRDNORM));
	if (e)
	ret \|= chn_poll(rdch, e, td);
	+ CHN_UNLOCK(rdch);
	}

	- dsp_unlock_chans(priv, FREAD \| FWRITE);
	-
	PCM_GIANT_LEAVE(d);

	return (ret);