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net: phylink: allow ethtool -A to change flow control advertisement 

When ethtool -A is used to change the pause modes, the pause
advertisement is not being changed, but the documentation in
uapi/linux/ethtool.h says we should be. Add that capability to
phylink.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2020-02-15 15:49:58 +00:00 committed by David S. Miller
parent 4e5aeb4157
commit f904f15ea9
1 changed files with 18 additions and 0 deletions
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18
drivers/net/phy/phylink.c
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@ -1385,6 +1385,7 @@ int phylink_ethtool_set_pauseparam(struct phylink *pl,
!pause->autoneg && pause->rx_pause != pause->tx_pause)
return -EINVAL;
mutex_lock(&pl->state_mutex);
config->pause = 0;
if (pause->autoneg)
config->pause |= MLO_PAUSE_AN;
@ -1393,6 +1394,22 @@ int phylink_ethtool_set_pauseparam(struct phylink *pl,
if (pause->tx_pause)
config->pause |= MLO_PAUSE_TX;
/*
* See the comments for linkmode_set_pause(), wrt the deficiencies
* with the current implementation. A solution to this issue would
* be:
* ethtool Local device
* rx tx Pause AsymDir
* 0 0 0 0
* 1 0 1 1
* 0 1 0 1
* 1 1 1 1
* and then use the ethtool rx/tx enablement status to mask the
* rx/tx pause resolution.
*/
linkmode_set_pause(config->advertising, pause->tx_pause,
pause->rx_pause);
/* If we have a PHY, phylib will call our link state function if the
* mode has changed, which will trigger a resolve and update the MAC
* configuration.
@ -1405,6 +1422,7 @@ int phylink_ethtool_set_pauseparam(struct phylink *pl,
phylink_mac_config(pl, &pl->link_config);
phylink_mac_an_restart(pl);
}
mutex_unlock(&pl->state_mutex);
return 0;
}