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net: ethernet: Add helper to remove a supported link mode

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Some MAC hardware cannot support a subset of link modes. e.g. often
1Gbps Full duplex is supported, but Half duplex is not. Add a helper
to remove such a link mode.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn
2018-09-12 01:53:14 +02:00
committed by David S. Miller
parent 04b7d41d80
commit 41124fa64d
9 changed files with 38 additions and 14 deletions
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12
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@@ -993,10 +993,14 @@ static int stmmac_init_phy(struct net_device *dev)
* Half-duplex mode not supported with multiqueue
* half-duplex can only works with single queue
*/
if (tx_cnt > 1)
phydev->supported &= ~(SUPPORTED_1000baseT_Half |
SUPPORTED_100baseT_Half |
SUPPORTED_10baseT_Half);
if (tx_cnt > 1) {
phy_remove_link_mode(phydev,
ETHTOOL_LINK_MODE_10baseT_Half_BIT);
phy_remove_link_mode(phydev,
ETHTOOL_LINK_MODE_100baseT_Half_BIT);
phy_remove_link_mode(phydev,
ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
}
/*
* Broken HW is sometimes missing the pull-up resistor on the