net: dsa: Down cpu/dsa ports phylink will control

DSA and CPU ports can be configured in two ways. By default, the
driver should configure such ports to there maximum bandwidth. For
most use cases, this is sufficient. When this default is insufficient,
a phylink instance can be bound to such ports, and phylink will
configure the port, e.g. based on fixed-link properties. phylink
assumes the port is initially down. Given that the driver should have
already configured it to its maximum speed, ask the driver to down
the port before instantiating the phylink instance.

Fixes: af0024100559 ("net: mv88e6xxx: use resolved link config in mac_link_up()")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/port.c b/net/dsa/port.c
index 231b2d494f1cb4f43985966b9a3c05e10f4dfb91..a58fdd3625743d5314aa57828019fc96b40cecc6 100644 (file)
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -670,11 +670,16 @@ int dsa_port_link_register_of(struct dsa_port *dp)
 {
        struct dsa_switch *ds = dp->ds;
        struct device_node *phy_np;
+       int port = dp->index;
 
        if (!ds->ops->adjust_link) {
                phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
-               if (of_phy_is_fixed_link(dp->dn) || phy_np)
+               if (of_phy_is_fixed_link(dp->dn) || phy_np) {
+                       if (ds->ops->phylink_mac_link_down)
+                               ds->ops->phylink_mac_link_down(ds, port,
+                                       MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
                        return dsa_port_phylink_register(dp);
+               }
                return 0;
        }