netdev - [PATCH net 3/5] i40e: fix the restart auto-negotiation after FEC modified

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Message-Id: <20210507164151.2878147-4-anthony.l.nguyen@intel.com>
Date:   Fri,  7 May 2021 09:41:49 -0700
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     Jaroslaw Gawin <jaroslawx.gawin@...el.com>, netdev@...r.kernel.org,
        sassmann@...hat.com, anthony.l.nguyen@...el.com,
        Mateusz Palczewski <mateusz.palczewski@...el.com>,
        Dave Switzer <david.switzer@...el.com>
Subject: [PATCH net 3/5] i40e: fix the restart auto-negotiation after FEC modified

From: Jaroslaw Gawin <jaroslawx.gawin@...el.com>

When FEC mode was changed the link didn't know it because
the link was not reset and new parameters were not negotiated.
Set a flag 'I40E_AQ_PHY_ENABLE_ATOMIC_LINK' in 'abilities'
to restart the link and make it run with the new settings.

Fixes: 1d96340196f1 ("i40e: Add support FEC configuration for Fortville 25G")
Signed-off-by: Jaroslaw Gawin <jaroslawx.gawin@...el.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@...el.com>
Tested-by: Dave Switzer <david.switzer@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index 040a01400b85..53416787fb7b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -1409,7 +1409,8 @@ static int i40e_set_fec_cfg(struct net_device *netdev, u8 fec_cfg)
 
 		memset(&config, 0, sizeof(config));
 		config.phy_type = abilities.phy_type;
-		config.abilities = abilities.abilities;
+		config.abilities = abilities.abilities |
+				   I40E_AQ_PHY_ENABLE_ATOMIC_LINK;
 		config.phy_type_ext = abilities.phy_type_ext;
 		config.link_speed = abilities.link_speed;
 		config.eee_capability = abilities.eee_capability;
-- 
2.26.2