--- zzzz-none-000/linux-3.10.107/drivers/net/phy/phy_device.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/drivers/net/phy/phy_device.c	2021-11-10 11:53:55.000000000 +0000
@@ -615,6 +615,9 @@
 	phydev->attached_dev->phydev = NULL;
 	phydev->attached_dev = NULL;
 
+	if (phydev->drv && phydev->drv->detach)
+		phydev->drv->detach(phydev);
+
 	/* If the device had no specific driver before (i.e. - it
 	 * was using the generic driver), we unbind the device
 	 * from the generic driver so that there's a chance a