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

From: Greg Kroah-Hartman
Date: Mon Dec 18 2017 - 10:54:24 EST

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


From: Taku Izumi <izumi.taku@xxxxxxxxxxxxxx>

[ 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@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
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
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)