D57833.id180570.diff
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	diff --git a/sys/dev/sound/pcm/channel.h b/sys/dev/sound/pcm/channel.h
	--- a/sys/dev/sound/pcm/channel.h
	+++ b/sys/dev/sound/pcm/channel.h
	@@ -261,6 +261,7 @@
	int chn_sync(struct pcm_channel *c, int threshold);
	int chn_flush(struct pcm_channel *c);
	int chn_polltrigger(struct pcm_channel *c);
	+void chn_pollreset(struct pcm_channel *c);
	int chn_poll(struct pcm_channel c, int ev, struct thread td);

	char chn_mkname(char buf, size_t len, struct pcm_channel *c);
	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
	@@ -296,7 +296,7 @@
	return ((delta < c->lw) ? 0 : 1);
	}

	-static void
	+void
	chn_pollreset(struct pcm_channel *c)
	{

	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
	@@ -3025,6 +3025,8 @@
	kn->kn_kevent.ext[0] = sndbuf_getready(ch->bufsoft) / ch->bufsoft->align;
	}
	kn->kn_kevent.ext[1] = ch->xruns;
	+ if (kn->kn_status & KN_SCAN)
	+ chn_pollreset(ch);
	}

	return (kn->kn_data > 0);