RDMA/core: Fix ENODEV error for iWARP test over vlan

If traffic is over vlan, cma_validate_port() fails to match vlan
net_device ifindex with bound_if_index and results in ENODEV error.
It is because rdma_copy_src_l2_addr() always assigns bound_if_index with
real net_device ifindex.
This patch fixes the issue by assigning bound_if_index with vlan
net_device index if traffic is over vlan.

Fixes: f8ef1be ("RDMA/cma: Avoid GID lookups on iWARP devices")
Signed-off-by: Anumula Murali Mohan Reddy <[email protected]>
Signed-off-by: Potnuri Bharat Teja <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Leon Romanovsky <[email protected]>

Author: Anumula-Murali-Mohan-Reddy

drivers/infiniband/core/addr.c

@@ -269,6 +269,8 @@ rdma_find_ndev_for_src_ip_rcu(struct net *net, const struct sockaddr *src_in)
 		break;
 #endif
 	}
+	if (!ret && dev && is_vlan_dev(dev))
+		dev = vlan_dev_real_dev(dev);
 	return ret ? ERR_PTR(ret) : dev;
 }