Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.18 110/350] net: phy: phylink: ensure the carrier is off when starting phylink | Date | Sun, 11 Nov 2018 14:19:34 -0800 |
| |
4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Antoine Tenart <antoine.tenart@bootlin.com>
[ Upstream commit aeeb2e8fdefdd5d257a1446351c70cb3df540199 ]
Phylink made an assumption about the carrier state being down when calling phylink_start(). If this assumption isn't satisfied, the internal phylink state could misbehave and a net device could end up not being functional.
This patch fixes this by explicitly calling netif_carrier_off() in phylink_start().
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/net/phy/phylink.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -907,6 +907,9 @@ void phylink_start(struct phylink *pl) phylink_an_mode_str(pl->link_an_mode), phy_modes(pl->link_config.interface)); + /* Always set the carrier off */ + netif_carrier_off(pl->netdev); + /* Apply the link configuration to the MAC when starting. This allows * a fixed-link to start with the correct parameters, and also * ensures that we set the appropriate advertisement for Serdes links.
| |