i40e: Properly check allowed advertisement capabilities

The i40e_set_link_ksettings and i40e_get_link_ksettings use different
codepaths to check available and supported advertisement modes. This
creates scenarios where it's possible to set a mode that's not allowed,
resulting in a link down.

Fix setting advertisement in i40e_set_link_ksettings by calling
i40e_get_link_ksettings to check what modes are allowed.

Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index 89807e3..0ce68e8 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -870,23 +870,21 @@ static int i40e_set_link_ksettings(struct net_device *netdev,
        /* save autoneg out of ksettings */
        autoneg = copy_ks.base.autoneg;
 
-       memset(&safe_ks, 0, sizeof(safe_ks));
+       /* get our own copy of the bits to check against */
+       memset(&safe_ks, 0, sizeof(struct ethtool_link_ksettings));
+       safe_ks.base.cmd = copy_ks.base.cmd;
+       safe_ks.base.link_mode_masks_nwords =
+               copy_ks.base.link_mode_masks_nwords;
+       i40e_get_link_ksettings(netdev, &safe_ks);
+
        /* Get link modes supported by hardware and check against modes
         * requested by the user.  Return an error if unsupported mode was set.
         */
-       i40e_phy_type_to_ethtool(pf, &safe_ks);
        if (!bitmap_subset(copy_ks.link_modes.advertising,
                           safe_ks.link_modes.supported,
                           __ETHTOOL_LINK_MODE_MASK_NBITS))
                return -EINVAL;
 
-       /* get our own copy of the bits to check against */
-       memset(&safe_ks, 0, sizeof(struct ethtool_link_ksettings));
-       safe_ks.base.cmd = copy_ks.base.cmd;
-       safe_ks.base.link_mode_masks_nwords =
-               copy_ks.base.link_mode_masks_nwords;
-       i40e_get_link_ksettings(netdev, &safe_ks);
-
        /* set autoneg back to what it currently is */
        copy_ks.base.autoneg = safe_ks.base.autoneg;