D32877.1794733429.diff
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	Index: sys/xen/xen_intr.c
	===================================================================
	--- sys/xen/xen_intr.c
	+++ sys/xen/xen_intr.c
	@@ -327,7 +327,8 @@
	xen_intr_release_isrc(struct xenisrc *isrc)
	{

	- mtx_lock(&xen_intr_isrc_lock);
	+ if (mtx_owned() == 0)
	+ mtx_lock(&xen_intr_isrc_lock);
	evtchn_mask_port(isrc->xi_port);
	evtchn_clear_port(isrc->xi_port);

	@@ -1174,7 +1175,6 @@
	mtx_unlock(&xen_intr_isrc_lock);
	return;
	}
	- mtx_unlock(&xen_intr_isrc_lock);

	xen_intr_release_isrc(isrc);
	}