From 3f911800613a3417101563b488c51a9b310ba7fa Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Fri, 27 Dec 2019 20:14:57 +0200 Subject: [PATCH] net: dsa: Pass pcs_poll flag from driver to PHYLINK The DSA drivers that implement .phylink_mac_link_state should normally register an interrupt for the PCS, from which they should call phylink_mac_change(). However not all switches implement this, and those who don't should set this flag in dsa_switch in the .setup callback, so that PHYLINK will poll for a few ms until the in-band AN link timer expires and the PCS state settles. Signed-off-by: Vladimir Oltean Conflicts: include/net/dsa.h trivially with upstream commit 05f294a85235 ("net: dsa: allocate ports on touch") which was merged in v5.4-rc3. --- include/net/dsa.h | 5 +++++ net/dsa/port.c | 1 + 2 files changed, 6 insertions(+) --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -286,6 +286,11 @@ struct dsa_switch { */ bool vlan_filtering; + /* MAC PCS does not provide link state change interrupt, and requires + * polling. Flag passed on to PHYLINK. + */ + bool pcs_poll; + /* Dynamically allocated ports, keep last */ size_t num_ports; struct dsa_port ports[]; --- a/net/dsa/port.c +++ b/net/dsa/port.c @@ -639,6 +639,7 @@ static int dsa_port_phylink_register(str dp->pl_config.dev = ds->dev; dp->pl_config.type = PHYLINK_DEV; + dp->pl_config.pcs_poll = ds->pcs_poll; dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, &dsa_port_phylink_mac_ops);