phylink: restart 802.3z negotiation when starting net device

Restart 802.3z negotiation when the net device is brought up to ensure
that the link partner has our current link modes.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 56048646393090c6b9833bdd588e4b44b44f8987..40563c8d73521dc41df46762d822bdf6473ca12a 100644 (file)
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -751,6 +751,12 @@ void phylink_start(struct phylink *pl)
        phylink_resolve_flow(pl, &pl->link_config);
        phylink_mac_config(pl, &pl->link_config);
 
+       /* Restart autonegotiation if using 802.3z to ensure that the link
+        * parameters are properly negotiated.  This is necessary for DSA
+        * switches using 802.3z negotiation to ensure they see our modes.
+        */
+       phylink_mac_an_restart(pl);
+
        clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
        phylink_run_resolve(pl);