[PATCH AUTOSEL for 4.14 23/64] nfp: inherit the max_mtu from the PF netdev

[alexander . levin]

From: Dirk van der Merwe <dirk.vandermerwe@xxxxxxxxxxxxx>

[ Upstream commit 743ba5b47f7961fb29f2e06bb694fb4f068ac58f ]

The PF netdev is used for data transfer for reprs, so reprs inherit the
maximum MTU settings of the PF netdev.

Fixes: 5de73ee46704 ("nfp: general representor implementation")
Signed-off-by: Dirk van der Merwe <dirk.vandermerwe@xxxxxxxxxxxxx>
Reviewed-by: Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_repr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
index d540a9dc77b3..1c43aca8162d 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -297,6 +297,8 @@ int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
 	netdev->netdev_ops = &nfp_repr_netdev_ops;
 	netdev->ethtool_ops = &nfp_port_ethtool_ops;
 
+	netdev->max_mtu = pf_netdev->max_mtu;
+
 	SWITCHDEV_SET_OPS(netdev, &nfp_port_switchdev_ops);
 
 	if (nfp_app_has_tc(app)) {
-- 
2.11.0