net: phy: realtek: clear master_slave_state if link is down

rtlgen_decode_physr() which sets master_slave_state isn't called in case
the link is down and other than rtlgen_read_status(),
rtl822x_c45_read_status() doesn't implicitely clear master_slave_state.

Avoid stale master_slave_state by always setting it to
MASTER_SLAVE_STATE_UNKNOWN in rtl822x_c45_read_status() in case the link
is down.

Fixes: 081c9c0 ("net: phy: realtek: read duplex and gbit master from PHYSR register")
Signed-off-by: Daniel Golle <[email protected]>
Reviewed-by: Michal Swiatkowski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: dangowrt

drivers/net/phy/realtek.c

@@ -1038,8 +1038,10 @@ static int rtl822x_c45_read_status(struct phy_device *phydev)
 	if (ret < 0)
 		return ret;
 
-	if (!phydev->link)
+	if (!phydev->link) {
+		phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
 		return 0;
+	}
 
 	/* Read actual speed from vendor register. */
 	val = phy_read_mmd(phydev, MDIO_MMD_VEND2, RTL_VND2_PHYSR);