net: phy: let phy_speed_down/up support speeds >1Gbps

So far phy_speed_down/up can be used up to 1Gbps only. Remove this
restriction by using new helper __phy_speed_down. New member adv_old
in struct phy_device is used by phy_speed_up to restore the advertised
modes before calling phy_speed_down. Don't simply advertise what is
supported because a user may have intentionally removed modes from
advertisement.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 62fdc7ff2b24..5ac7d21375ac 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -403,6 +403,8 @@ struct phy_device {
         __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
         __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
         __ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
+        /* used with phy_speed_down */
+        __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_old);
 
         /* Energy efficient ethernet modes which should be prohibited */
         u32 eee_broken_modes;