Background: Turris Omnia (Armada 385); eth2 (mvneta) connected to SFP bus; SFP module is present, but no fiber connected, so definitely no carrier.
After booting, eth2 is down, but netdev LED trigger surprisingly reports link active. Then, after "ip link set eth2 up", the link indicator goes away - as I would have expected it from the beginning.
It turns out, that the default carrier state after netdev creation is "carrier ok". Some ethernet drivers explicitly call netif_carrier_off during probing, others (like mvneta) don't - which explains the current behaviour: only when the device is brought up, phylink_start calls netif_carrier_off.
Fix this for all drivers using phylink, by calling netif_carrier_off in phylink_create.
Fixes: 089381b27abe ("leds: initial support for Turris Omnia LEDs") Cc: stable@vger.kernel.org Suggested-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Klaus Kudielka klaus.kudielka@gmail.com Reviewed-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Reviewed-by: Andrew Lunn andrew@lunn.ch --- v2: clarified fixed drivers; added fixes tag & cc stable
drivers/net/phy/phylink.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 6712883498..a28da80bde 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -1616,6 +1616,7 @@ struct phylink *phylink_create(struct phylink_config *config, pl->config = config; if (config->type == PHYLINK_NETDEV) { pl->netdev = to_net_dev(config->dev); + netif_carrier_off(pl->netdev); } else if (config->type == PHYLINK_DEV) { pl->dev = config->dev; } else {