Commit 8bc1c543 authored by Luo Jie's avatar Luo Jie Committed by David S. Miller
Browse files

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



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: default avatarLuo Jie <luoj@codeaurora.org>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9d4dae29

drivers/net/phy/at803x.c

+16 −0
Original line number Diff line number Diff line
@@ -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;

}