Commit 3be98b2d authored Apr 14, 2020 by Andrew Lunn Committed by David S. Miller Apr 14, 2020

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: 30c4a5b0 ("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>

parent 34b5e6a3

net/dsa/port.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

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