net: phylink: initialize carrier state at creation

commit 02d5fdbf4f2b8c406f7a4c98fa52aa181a11d733 upstream.

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 5b064a1de92f070154be8815aa94dfc30144e412..fc58e4afb38dd189f7c3648208961e906d299393 100644 (file)
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1479,6 +1479,7 @@ 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 {