Not all variants of the sh_eth hardware have Gigabit support. Unfortunately, the current driver doesn't update phydev->supported depending on the MAC capabilities. Due to this, if you have a Gigabit capable PHY, the PHY will advertise its Gigabit capability and establish a link at 1Gbit/s, even though the MAC doesn't support it. In order to avoid this, we mark phydev->supported if we're running a non-Gigabit capable hardware. Tested on a SH7786 platform, with a Gigabit PHY. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/renesas/sh_eth.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index db72d13cebb9..0074c5998481 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -1892,6 +1892,11 @@ static int sh_eth_phy_init(struct net_device *ndev) return PTR_ERR(phydev); } + /* mask with MAC supported features */ + if (mdp->cd->register_type != SH_ETH_REG_GIGABIT) + phydev->supported &= PHY_BASIC_FEATURES; + phydev->advertising = phydev->supported; + phy_attached_info(phydev); return 0; -- 2.13.6
