Index: head/sys/dev/sfxge/common/efx_filter.c
===================================================================
--- head/sys/dev/sfxge/common/efx_filter.c
+++ head/sys/dev/sfxge/common/efx_filter.c
@@ -248,7 +248,7 @@
 	__in				boolean_t all_mulcst,
 	__in				boolean_t brdcst,
 	__in_ecount(6*count)		uint8_t const *addrs,
-	__in				int count)
+	__in				uint32_t count)
 {
 	efx_rc_t rc;
 
Index: head/sys/dev/sfxge/common/efx_impl.h
===================================================================
--- head/sys/dev/sfxge/common/efx_impl.h
+++ head/sys/dev/sfxge/common/efx_impl.h
@@ -246,7 +246,7 @@
 	efx_rc_t	(*efo_supported_filters)(efx_nic_t *, uint32_t *, size_t *);
 	efx_rc_t	(*efo_reconfigure)(efx_nic_t *, uint8_t const *, boolean_t,
 				   boolean_t, boolean_t, boolean_t,
-				   uint8_t const *, int);
+				   uint8_t const *, uint32_t);
 } efx_filter_ops_t;
 
 extern	__checkReturn	efx_rc_t
@@ -258,7 +258,7 @@
 	__in				boolean_t all_mulcst,
 	__in				boolean_t brdcst,
 	__in_ecount(6*count)		uint8_t const *addrs,
-	__in				int count);
+	__in				uint32_t count);
 
 #endif /* EFSYS_OPT_FILTER */
 
Index: head/sys/dev/sfxge/common/hunt_filter.c
===================================================================
--- head/sys/dev/sfxge/common/hunt_filter.c
+++ head/sys/dev/sfxge/common/hunt_filter.c
@@ -1049,7 +1049,7 @@
 	__in				boolean_t all_mulcst,
 	__in				boolean_t brdcst,
 	__in_ecount(6*count)		uint8_t const *addrs,
-	__in				int count,
+	__in				uint32_t count,
 	__in				efx_filter_flag_t filter_flags)
 {
 	ef10_filter_table_t *eftp = enp->en_filter.ef_ef10_filter_table;
@@ -1202,7 +1202,7 @@
 	__in				boolean_t all_mulcst,
 	__in				boolean_t brdcst,
 	__in_ecount(6*count)		uint8_t const *addrs,
-	__in				int count)
+	__in				uint32_t count)
 {
 	ef10_filter_table_t *table = enp->en_filter.ef_ef10_filter_table;
 	efx_filter_flag_t filter_flags;
Index: head/sys/dev/sfxge/common/hunt_impl.h
===================================================================
--- head/sys/dev/sfxge/common/hunt_impl.h
+++ head/sys/dev/sfxge/common/hunt_impl.h
@@ -1082,7 +1082,7 @@
 	__in				boolean_t all_mulcst,
 	__in				boolean_t brdcst,
 	__in_ecount(6*count)		uint8_t const *addrs,
-	__in				int count);
+	__in				uint32_t count);
 
 extern		void
 ef10_filter_get_default_rxq(