net: phy: Put interface into oper testing during cable test

Since running a cable test is disruptive, put the interface into
operative state testing while the test is running.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NMichal Kubecek <mkubecek@suse.cz>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/phy/phy.c

@@ -492,6 +492,7 @@ static void phy_abort_cable_test(struct phy_device *phydev)
 int phy_start_cable_test(struct phy_device *phydev,
 			 struct netlink_ext_ack *extack)
 {
+	struct net_device *dev = phydev->attached_dev;
 	int err = -ENOMEM;
 
 	if (!(phydev->drv &&
@@ -525,8 +526,10 @@ int phy_start_cable_test(struct phy_device *phydev,
 	/* Mark the carrier down until the test is complete */
 	phy_link_down(phydev, true);
 
+	netif_testing_on(dev);
 	err = phydev->drv->cable_test_start(phydev);
 	if (err) {
+		netif_testing_off(dev);
 		phy_link_up(phydev);
 		goto out_free;
 	}
@@ -879,6 +882,8 @@ EXPORT_SYMBOL(phy_free_interrupt);
  */
 void phy_stop(struct phy_device *phydev)
 {
+	struct net_device *dev = phydev->attached_dev;
+
 	if (!phy_is_started(phydev)) {
 		WARN(1, "called from state %s\n",
 		     phy_state_to_str(phydev->state));
@@ -887,8 +892,10 @@ void phy_stop(struct phy_device *phydev)
 
 	mutex_lock(&phydev->lock);
 
-	if (phydev->state == PHY_CABLETEST)
+	if (phydev->state == PHY_CABLETEST) {
 		phy_abort_cable_test(phydev);
+		netif_testing_off(dev);
+	}
 
 	if (phydev->sfp_bus)
 		sfp_upstream_stop(phydev->sfp_bus);
@@ -950,6 +957,7 @@ void phy_state_machine(struct work_struct *work)
 	struct delayed_work *dwork = to_delayed_work(work);
 	struct phy_device *phydev =
 			container_of(dwork, struct phy_device, state_queue);
+	struct net_device *dev = phydev->attached_dev;
 	bool needs_aneg = false, do_suspend = false;
 	enum phy_state old_state;
 	bool finished = false;
@@ -975,6 +983,7 @@ void phy_state_machine(struct work_struct *work)
 		err = phydev->drv->cable_test_get_status(phydev, &finished);
 		if (err) {
 			phy_abort_cable_test(phydev);
+			netif_testing_off(dev);
 			needs_aneg = true;
 			phydev->state = PHY_UP;
 			break;
@@ -982,6 +991,7 @@ void phy_state_machine(struct work_struct *work)
 
 		if (finished) {
 			ethnl_cable_test_finished(phydev);
+			netif_testing_off(dev);
 			needs_aneg = true;
 			phydev->state = PHY_UP;
 		}