Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 361576c9 authored by Anumula Murali Mohan Reddy's avatar Anumula Murali Mohan Reddy Committed by Greg Kroah-Hartman
Browse files

RDMA/cxgb4: Fix RDMA_CM_EVENT_UNREACHABLE error for iWARP 

[ Upstream commit c659b405b82ead335bee6eb33f9691bf718e21e8 ]

ip_dev_find() always returns real net_device address, whether traffic is
running on a vlan or real device, if traffic is over vlan, filling
endpoint struture with real ndev and an attempt to send a connect request
will results in RDMA_CM_EVENT_UNREACHABLE error.  This patch fixes the
issue by using vlan_dev_real_dev().

Fixes: 830662f6 ("RDMA/cxgb4: Add support for active and passive open connection with IPv6 address")
Link: https://patch.msgid.link/r/20241007132311.70593-1-anumula@chelsio.com


Signed-off-by: default avatarAnumula Murali Mohan Reddy <anumula@chelsio.com>
Signed-off-by: default avatarPotnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 3e988395

drivers/infiniband/hw/cxgb4/cm.c

+4 −5
Original line number Diff line number Diff line
@@ -2043,7 +2043,7 @@ static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip, 
	err = -ENOMEM;

	if (n->dev->flags & IFF_LOOPBACK) {

		if (iptype == 4)

			pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);

			pdev = __ip_dev_find(&init_net, *(__be32 *)peer_ip, false);

		else if (IS_ENABLED(CONFIG_IPV6))

			for_each_netdev(&init_net, pdev) {

				if (ipv6_chk_addr(&init_net,
@@ -2058,12 +2058,12 @@ static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip, 
			err = -ENODEV;

			goto out;

		}

		if (is_vlan_dev(pdev))

			pdev = vlan_dev_real_dev(pdev);

		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,

					n, pdev, rt_tos2priority(tos));

		if (!ep->l2t) {

			dev_put(pdev);

		if (!ep->l2t)

			goto out;

		}

		ep->mtu = pdev->mtu;

		ep->tx_chan = cxgb4_port_chan(pdev);

		ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
@@ -2077,7 +2077,6 @@ static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip, 
		ep->rss_qid = cdev->rdev.lldi.rxq_ids[

			cxgb4_port_idx(pdev) * step];

		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));

		dev_put(pdev);

	} else {

		pdev = get_real_dev(n->dev);

		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,