[PATCH rdma-core 2/3] verbs: Allow passing NULL vid for ibv_resolve_eth_l2_from_gid()

[Kamal Heib <kamalheib1@xxxxxxxxx>]

Simplify callers for ibv_resolve_eth_l2_from_gid() by let them pass NULL
vid, in case that they aren't interested in it.

Signed-off-by: Kamal Heib <kamalheib1@xxxxxxxxx>
---
 libibverbs/verbs.c           | 11 +++++++----
 providers/mlx5/verbs.c       |  4 +---
 providers/vmw_pvrdma/verbs.c |  3 +--
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/libibverbs/verbs.c b/libibverbs/verbs.c
index 9cdc361b5610..188bccbaf860 100644
--- a/libibverbs/verbs.c
+++ b/libibverbs/verbs.c
@@ -1021,10 +1021,12 @@ int ibv_resolve_eth_l2_from_gid(struct ibv_context *context,
 	if (process_get_neigh(&neigh_handler))
 		goto free_resources;
 
-	ret_vid = neigh_get_vlan_id_from_dev(&neigh_handler);
+	if (vid) {
+		ret_vid = neigh_get_vlan_id_from_dev(&neigh_handler);
 
-	if (ret_vid <= 0xfff)
-		neigh_set_vlan_id(&neigh_handler, ret_vid);
+		if (ret_vid <= 0xfff)
+			neigh_set_vlan_id(&neigh_handler, ret_vid);
+	}
 
 	/* We are using only Ethernet here */
 	ether_len = neigh_get_ll(&neigh_handler,
@@ -1034,7 +1036,8 @@ int ibv_resolve_eth_l2_from_gid(struct ibv_context *context,
 	if (ether_len <= 0)
 		goto free_resources;
 
-	*vid = ret_vid;
+	if (vid)
+		*vid = ret_vid;
 
 	ret = 0;
 
diff --git a/providers/mlx5/verbs.c b/providers/mlx5/verbs.c
index 7a655a174f7b..930d6cd3cc2d 100644
--- a/providers/mlx5/verbs.c
+++ b/providers/mlx5/verbs.c
@@ -2454,10 +2454,8 @@ struct ibv_ah *mlx5_create_ah(struct ibv_pd *pd, struct ibv_ah_attr *attr)
 			ah->kern_ah = true;
 			memcpy(ah->av.rmac, resp.dmac, ETHERNET_LL_SIZE);
 		} else {
-			uint16_t vid;
-
 			if (ibv_resolve_eth_l2_from_gid(pd->context, attr,
-							ah->av.rmac, &vid))
+							ah->av.rmac, NULL))
 				goto err;
 		}
 	}
diff --git a/providers/vmw_pvrdma/verbs.c b/providers/vmw_pvrdma/verbs.c
index b9819390ba8d..e27952bff1bb 100644
--- a/providers/vmw_pvrdma/verbs.c
+++ b/providers/vmw_pvrdma/verbs.c
@@ -190,7 +190,6 @@ struct ibv_ah *pvrdma_create_ah(struct ibv_pd *pd,
 	struct pvrdma_ah *ah;
 	struct pvrdma_av *av;
 	struct ibv_port_attr port_attr;
-	uint16_t vlan_id;
 
 	if (!attr->is_global)
 		return NULL;
@@ -224,7 +223,7 @@ struct ibv_ah *pvrdma_create_ah(struct ibv_pd *pd,
 
 	if (port_attr.port_cap_flags & IBV_PORT_IP_BASED_GIDS) {
 		if (!ibv_resolve_eth_l2_from_gid(pd->context, attr,
-						 av->dmac, &vlan_id))
+						 av->dmac, NULL))
 			return &ah->ibv_ah;
 	} else {
 		if (!set_mac_from_gid(&attr->grh.dgid, av->dmac))
-- 
2.20.1