linux-kernel - [PATCH 4.4 042/115] fjes: Fix wrong netdevice feature flags

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Date:   Mon, 18 Dec 2017 16:48:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Taku Izumi <izumi.taku@...fujitsu.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.4 042/115] fjes: Fix wrong netdevice feature flags

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Taku Izumi <izumi.taku@...fujitsu.com>


[ Upstream commit fe8daf5fa715f7214952f06a387e4b7de818c5be ]

This patch fixes netdev->features for Extended Socket network device.

Currently Extended Socket network device's netdev->feature claims
NETIF_F_HW_CSUM, however this is completely wrong. There's no feature
of checksum offloading.
That causes invalid TCP/UDP checksum and packet rejection when IP
forwarding from Extended Socket network device to other network device.

NETIF_F_HW_CSUM should be omitted.

Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/fjes/fjes_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -1205,7 +1205,7 @@ static void fjes_netdev_setup(struct net
 	fjes_set_ethtool_ops(netdev);
 	netdev->mtu = fjes_support_mtu[0];
 	netdev->flags |= IFF_BROADCAST;
-	netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
+	netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 }
 
 static void fjes_irq_watch_task(struct work_struct *work)