From: Veerasenareddy Burru <veerasenareddy.burru@cavium.com>
Date: Tue, 15 Aug 2017 16:26:22 -0700
Subject: liquidio: update VF's netdev->max_mtu if there's a change in PF's MTU
Patch-mainline: v4.14-rc1
Git-commit: 251564f601a26d01b3b0e5a40889b4efb6823403
References: bsc#1067126

A VF's MTU is capped at the parent PF's MTU.  So if there's a change in the
PF's MTU, then update the VF's netdev->max_mtu.

Also remove duplicate log messages for MTU change.

Signed-off-by: Veerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/cavium/liquidio/lio_core.c    |    3 ---
 drivers/net/ethernet/cavium/liquidio/lio_vf_main.c |    9 ++++++---
 2 files changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/cavium/liquidio/lio_core.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c
@@ -165,9 +165,6 @@ void liquidio_link_ctrl_cmd_completion(v
 		/* If command is successful, change the MTU. */
 		netif_info(lio, probe, lio->netdev, "MTU Changed from %d to %d\n",
 			   netdev->mtu, nctrl->ncmd.s.param1);
-		dev_info(&oct->pci_dev->dev, "%s MTU Changed from %d to %d\n",
-			 netdev->name, netdev->mtu,
-			 nctrl->ncmd.s.param1);
 		netdev->mtu = nctrl->ncmd.s.param1;
 		queue_delayed_work(lio->link_status_wq.wq,
 				   &lio->link_status_wq.wk.work, 0);
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -630,6 +630,12 @@ static void update_link_status(struct ne
 			txqs_stop(netdev);
 		}
 
+		if (lio->linfo.link.s.mtu != netdev->max_mtu) {
+			dev_info(&oct->pci_dev->dev, "Max MTU Changed from %d to %d\n",
+				 netdev->max_mtu, lio->linfo.link.s.mtu);
+			netdev->max_mtu = lio->linfo.link.s.mtu;
+		}
+
 		if (lio->linfo.link.s.mtu < netdev->mtu) {
 			dev_warn(&oct->pci_dev->dev,
 				 "PF has changed the MTU for gmx port. Reducing the mtu from %d to %d\n",
@@ -1539,14 +1545,11 @@ static struct net_device_stats *liquidio
 static int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
 {
 	struct lio *lio = GET_LIO(netdev);
-	struct octeon_device *oct = lio->oct_dev;
 
 	lio->mtu = new_mtu;
 
 	netif_info(lio, probe, lio->netdev, "MTU Changed from %d to %d\n",
 		   netdev->mtu, new_mtu);
-	dev_info(&oct->pci_dev->dev, "%s MTU Changed from %d to %d\n",
-		 netdev->name, netdev->mtu, new_mtu);
 
 	netdev->mtu = new_mtu;