linux-kernel - [PATCH 4.9 66/78] enic: do not call enic_change_mtu in enic

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Date:   Thu, 13 Sep 2018 15:31:53 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Govindarajulu Varadarajan <gvaradar@...co.com>,
        "David S. Miller" <davem@...emloft.net>,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>
Subject: [PATCH 4.9 66/78] enic: do not call enic_change_mtu in enic_probe

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

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

From: Govindarajulu Varadarajan <gvaradar@...co.com>

commit cb5c6568867325f9905e80c96531d963bec8e5ea upstream.

In commit ab123fe071c9 ("enic: handle mtu change for vf properly")
ASSERT_RTNL() is added to _enic_change_mtu() to prevent it from being
called without rtnl held. enic_probe() calls enic_change_mtu()
without rtnl held. At this point netdev is not registered yet.
Remove call to enic_change_mtu and assign the mtu to netdev->mtu.

Fixes: ab123fe071c9 ("enic: handle mtu change for vf properly")
Signed-off-by: Govindarajulu Varadarajan <gvaradar@...co.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Cc: Ben Hutchings <ben.hutchings@...ethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/cisco/enic/enic_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -2681,7 +2681,6 @@ static int enic_probe(struct pci_dev *pd
 	 */

 	enic->port_mtu = enic->config.mtu;
-	(void)enic_change_mtu(netdev, enic->port_mtu);

 	err = enic_set_mac_addr(netdev, enic->mac_addr);
 	if (err) {
@@ -2731,6 +2730,7 @@ static int enic_probe(struct pci_dev *pd
 		netdev->features |= NETIF_F_HIGHDMA;

 	netdev->priv_flags |= IFF_UNICAST_FLT;
+	netdev->mtu = enic->port_mtu;

 	err = register_netdev(netdev);
 	if (err) {