RDMA/mlx5: Obtain upper net device only when needed

[ Upstream commit 3ed7f9e ]

Report the upper device's state as the RDMA port state only in RoCE LAG or
switchdev LAG.

Fixes: 27f9e0c ("net/mlx5: Lag, Add single RDMA device in multiport mode")
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Michael Guralnik <michaelgur@nvidia.com>
Link: https://patch.msgid.link/20240909173025.30422-3-michaelgur@nvidia.com
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: mark-bloch

drivers/infiniband/hw/mlx5/main.c

@@ -539,7 +539,7 @@ static int mlx5_query_port_roce(struct ib_device *device, u32 port_num,
 	if (!ndev)
 		goto out;
 
-	if (dev->lag_active) {
+	if (mlx5_lag_is_roce(mdev) || mlx5_lag_is_sriov(mdev)) {
 		rcu_read_lock();
 		upper = netdev_master_upper_dev_get_rcu(ndev);
 		if (upper) {