6.1-stable review patch. If anyone has any objections, please let me know.
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From: Russell King (Oracle) rmk+kernel@armlinux.org.uk
[ Upstream commit 267d7692f6cd5c9b8796324cdd54db594ca8d3e4 ]
Move the link forcing out of mac_config() and into the mac_prepare() and mac_finish() methods. This results in no change to the order in which these operations are performed, but does mean when we convert mv88e6xxx to phylink_pcs support, we will continue to preserve this ordering.
Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Reviewed-by: Simon Horman simon.horman@corigine.com Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: 52fdc41c3278 ("net: dsa: mv88e6xxx: fix internal PHYs for 6320 family") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/mv88e6xxx/chip.c | 65 ++++++++++++++++++++++---------- 1 file changed, 45 insertions(+), 20 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index 4c60f79ce2697..b3744f2ea0f48 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -848,29 +848,38 @@ static void mv88e6xxx_get_caps(struct dsa_switch *ds, int port, } }
+static int mv88e6xxx_mac_prepare(struct dsa_switch *ds, int port, + unsigned int mode, phy_interface_t interface) +{ + struct mv88e6xxx_chip *chip = ds->priv; + int err = 0; + + /* In inband mode, the link may come up at any time while the link + * is not forced down. Force the link down while we reconfigure the + * interface mode. + */ + if (mode == MLO_AN_INBAND && + chip->ports[port].interface != interface && + chip->info->ops->port_set_link) { + mv88e6xxx_reg_lock(chip); + err = chip->info->ops->port_set_link(chip, port, + LINK_FORCED_DOWN); + mv88e6xxx_reg_unlock(chip); + } + + return err; +} + static void mv88e6xxx_mac_config(struct dsa_switch *ds, int port, unsigned int mode, const struct phylink_link_state *state) { struct mv88e6xxx_chip *chip = ds->priv; - struct mv88e6xxx_port *p; int err = 0;
- p = &chip->ports[port]; - mv88e6xxx_reg_lock(chip);
if (mode != MLO_AN_PHY || !mv88e6xxx_phy_is_internal(ds, port)) { - /* In inband mode, the link may come up at any time while the - * link is not forced down. Force the link down while we - * reconfigure the interface mode. - */ - if (mode == MLO_AN_INBAND && - p->interface != state->interface && - chip->info->ops->port_set_link) - chip->info->ops->port_set_link(chip, port, - LINK_FORCED_DOWN); - err = mv88e6xxx_port_config_interface(chip, port, state->interface); if (err && err != -EOPNOTSUPP) @@ -887,24 +896,38 @@ static void mv88e6xxx_mac_config(struct dsa_switch *ds, int port, err = 0; }
+err_unlock: + mv88e6xxx_reg_unlock(chip); + + if (err && err != -EOPNOTSUPP) + dev_err(ds->dev, "p%d: failed to configure MAC/PCS\n", port); +} + +static int mv88e6xxx_mac_finish(struct dsa_switch *ds, int port, + unsigned int mode, phy_interface_t interface) +{ + struct mv88e6xxx_chip *chip = ds->priv; + int err = 0; + /* Undo the forced down state above after completing configuration * irrespective of its state on entry, which allows the link to come * up in the in-band case where there is no separate SERDES. Also * ensure that the link can come up if the PPU is in use and we are * in PHY mode (we treat the PPU as an effective in-band mechanism.) */ + mv88e6xxx_reg_lock(chip); + if (chip->info->ops->port_set_link && - ((mode == MLO_AN_INBAND && p->interface != state->interface) || + ((mode == MLO_AN_INBAND && + chip->ports[port].interface != interface) || (mode == MLO_AN_PHY && mv88e6xxx_port_ppu_updates(chip, port)))) - chip->info->ops->port_set_link(chip, port, LINK_UNFORCED); + err = chip->info->ops->port_set_link(chip, port, LINK_UNFORCED);
- p->interface = state->interface; - -err_unlock: mv88e6xxx_reg_unlock(chip);
- if (err && err != -EOPNOTSUPP) - dev_err(ds->dev, "p%d: failed to configure MAC/PCS\n", port); + chip->ports[port].interface = interface; + + return err; }
static void mv88e6xxx_mac_link_down(struct dsa_switch *ds, int port, @@ -7024,7 +7047,9 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = { .port_teardown = mv88e6xxx_port_teardown, .phylink_get_caps = mv88e6xxx_get_caps, .phylink_mac_link_state = mv88e6xxx_serdes_pcs_get_state, + .phylink_mac_prepare = mv88e6xxx_mac_prepare, .phylink_mac_config = mv88e6xxx_mac_config, + .phylink_mac_finish = mv88e6xxx_mac_finish, .phylink_mac_an_restart = mv88e6xxx_serdes_pcs_an_restart, .phylink_mac_link_down = mv88e6xxx_mac_link_down, .phylink_mac_link_up = mv88e6xxx_mac_link_up,