D14060.diff
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	Index: head/sys/net/iflib.c
	===================================================================
	--- head/sys/net/iflib.c
	+++ head/sys/net/iflib.c
	@@ -1984,7 +1984,8 @@
	if (fl->ifl_sds.ifsd_map != NULL) {
	bus_dmamap_t sd_map = fl->ifl_sds.ifsd_map[i];
	bus_dmamap_unload(fl->ifl_desc_tag, sd_map);
	- bus_dmamap_destroy(fl->ifl_desc_tag, sd_map);
	+ if (fl->ifl_rxq->ifr_ctx->ifc_in_detach)
	+ bus_dmamap_destroy(fl->ifl_desc_tag, sd_map);
	}
	if (*sd_m != NULL) {
	m_init(*sd_m, M_NOWAIT, MT_DATA, 0);