[PATCH for-rc v2] RDMA/core: Fix ENODEV error for iWARP test over vlan

[Anumula Murali Mohan Reddy <anumula@chelsio.com>]

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: f8ef1be816bf ("RDMA/cma: Avoid GID lookups on iWARP devices")
Signed-off-by: Anumula Murali Mohan Reddy <anumula@chelsio.com>
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
---
Changes since v1:
Added fixes line
Addressed static checker warnings
Targeting to rc since this is a bug fix
---
 drivers/infiniband/core/addr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index be0743dac3ff..8962fc0fe4c4 100644
--- a/drivers/infiniband/core/addr.c
+++ b/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 (dev && is_vlan_dev(dev))
+		dev = vlan_dev_real_dev(dev);
 	return ret ? ERR_PTR(ret) : dev;
 }
 
-- 
2.39.3