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net: phy: adjust qca8081 master/slave seed value if link down

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1. The master/slave seed needs to be updated when the link can't
be created.

2. The case where two qca8081 PHYs are connected each other and
master/slave seed is generated as the same value also needs
to be considered, so adding this code change into read_status
instead of link_change_notify.

Signed-off-by: Luo Jie <luoj@codeaurora.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Luo Jie 2021-10-24 16:27:37 +08:00 committed by David S. Miller
parent 9d4dae2962
commit 8bc1c5430c
1 changed files with 16 additions and 0 deletions
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16
drivers/net/phy/at803x.c
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@ -1655,6 +1655,22 @@ static int qca808x_read_status(struct phy_device *phydev)
else
phydev->interface = PHY_INTERFACE_MODE_SMII;
/* generate seed as a lower random value to make PHY linked as SLAVE easily,
* except for master/slave configuration fault detected.
* the reason for not putting this code into the function link_change_notify is
* the corner case where the link partner is also the qca8081 PHY and the seed
* value is configured as the same value, the link can't be up and no link change
* occurs.
*/
if (!phydev->link) {
if (phydev->master_slave_state == MASTER_SLAVE_STATE_ERR) {
qca808x_phy_ms_seed_enable(phydev, false);
} else {
qca808x_phy_ms_random_seed_set(phydev);
qca808x_phy_ms_seed_enable(phydev, true);
}
}
return 0;
}