Index: sys/dev/cxgbe/t4_netmap.c
===================================================================
--- sys/dev/cxgbe/t4_netmap.c
+++ sys/dev/cxgbe/t4_netmap.c
@@ -909,10 +909,9 @@
 		while (n > 0) {
 			for (i = 0; i < 8; i++, fl_pidx++, slot++) {
 				PNMB(na, slot, &ba);
-				MPASS(ba != 0);
 				nm_rxq->fl_desc[fl_pidx] = htobe64(ba | hwidx);
-				slot->flags &= ~NS_BUF_CHANGED;
-				MPASS(fl_pidx <= nm_rxq->fl_sidx);
+ 				if (__predict_false(slot->flags & NS_BUF_CHANGED))
+ 					slot->flags &= ~NS_BUF_CHANGED;
 			}
 			n -= 8;
 			if (fl_pidx == nm_rxq->fl_sidx) {
Index: sys/dev/netmap/netmap_kern.h
===================================================================
--- sys/dev/netmap/netmap_kern.h
+++ sys/dev/netmap/netmap_kern.h
@@ -1876,14 +1876,16 @@
 	uint32_t i = slot->buf_idx;
 	struct lut_entry *lut = na->na_lut.lut;
 	struct plut_entry *plut = na->na_lut.plut;
-	void *ret = (i >= na->na_lut.objtotal) ? lut[0].vaddr : lut[i].vaddr;
+	if (unlikely((i >= na->na_lut.objtotal))) {
+		i = 0;
+	}
 
 #ifdef _WIN32
-	*pp = (i >= na->na_lut.objtotal) ? (uint64_t)plut[0].paddr.QuadPart : (uint64_t)plut[i].paddr.QuadPart;
+	*pp = (uint64_t)plut[i].paddr.QuadPart;
 #else
-	*pp = (i >= na->na_lut.objtotal) ? plut[0].paddr : plut[i].paddr;
+	*pp = plut[i].paddr;
 #endif
-	return ret;
+	return lut[i].vaddr;
 }