i40e: Fix order of checks when enabling/disabling autoneg in ethtool

Orabug: 22342532

We were previously checking if autoneg was allowed to change before
checking if autoneg was changing. We need to do this in the other order
or else we will erroneously return EINVAL when autoneg is not changing.

Change-ID: Iff9f7d1c9bddc1ad1e5d227d4f42754f90155410
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 3ce12ee9d8f9ae245f38e6acbd32625d8e002c5b)
Signed-off-by: Brian Maly <brian.maly@oracle.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index e2c21785a426522294fec41252f90c55a10a222e..44a08d4980f5f80422d32e47f06a061fd547e01d 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -661,28 +661,31 @@ static int i40e_set_settings(struct net_device *netdev,
 
        /* Check autoneg */
        if (autoneg == AUTONEG_ENABLE) {
-               /* If autoneg is not supported, return error */
-               if (!(safe_ecmd.supported & SUPPORTED_Autoneg)) {
-                       netdev_info(netdev, "Autoneg not supported on this phy\n");
-                       return -EINVAL;
-               }
                /* If autoneg was not already enabled */
                if (!(hw->phy.link_info.an_info & I40E_AQ_AN_COMPLETED)) {
+                       /* If autoneg is not supported, return error */
+                       if (!(safe_ecmd.supported & SUPPORTED_Autoneg)) {
+                               netdev_info(netdev, "Autoneg not supported on this phy\n");
+                               return -EINVAL;
+                       }
+                       /* Autoneg is allowed to change */
                        config.abilities = abilities.abilities |
                                           I40E_AQ_PHY_ENABLE_AN;
                        change = true;
                }
        } else {
-               /* If autoneg is supported 10GBASE_T is the only phy that
-                * can disable it, so otherwise return error
-                */
-               if (safe_ecmd.supported & SUPPORTED_Autoneg &&
-                   hw->phy.link_info.phy_type != I40E_PHY_TYPE_10GBASE_T) {
-                       netdev_info(netdev, "Autoneg cannot be disabled on this phy\n");
-                       return -EINVAL;
-               }
                /* If autoneg is currently enabled */
                if (hw->phy.link_info.an_info & I40E_AQ_AN_COMPLETED) {
+                       /* If autoneg is supported 10GBASE_T is the only PHY
+                        * that can disable it, so otherwise return error
+                        */
+                       if (safe_ecmd.supported & SUPPORTED_Autoneg &&
+                           hw->phy.link_info.phy_type !=
+                           I40E_PHY_TYPE_10GBASE_T) {
+                               netdev_info(netdev, "Autoneg cannot be disabled on this phy\n");
+                               return -EINVAL;
+                       }
+                       /* Autoneg is allowed to change */
                        config.abilities = abilities.abilities &
                                           ~I40E_AQ_PHY_ENABLE_AN;
                        change = true;