net: phy: remove parameter new_link from phy_mac_interrupt()

I see two issues with parameter new_link:

1. It's not needed. See also phy_interrupt(), works w/o this parameter.
   phy_mac_interrupt sets the state to PHY_CHANGELINK and triggers the
   state machine which then calls phy_read_status. And phy_read_status
   updates the link state.

2. phy_mac_interrupt is used in interrupt context and getting the link
   state may sleep (at least when having to access the PHY registers
   via MDIO bus).

So let's remove it.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/genet/bcmgenet.c

@@ -2527,9 +2527,10 @@ static void bcmgenet_irq_task(struct work_struct *work)
 	spin_unlock_irq(&priv->lock);
 
 	/* Link UP/DOWN event */
-	if (status & UMAC_IRQ_LINK_EVENT)
-		phy_mac_interrupt(priv->dev->phydev,
-				  !!(status & UMAC_IRQ_LINK_UP));
+	if (status & UMAC_IRQ_LINK_EVENT) {
+		priv->dev->phydev->link = !!(status & UMAC_IRQ_LINK_UP);
+		phy_mac_interrupt(priv->dev->phydev);
+	}
 }
 
 /* bcmgenet_isr1: handle Rx and Tx priority queues */

drivers/net/phy/phy.c

@@ -1057,16 +1057,12 @@ void phy_state_machine(struct work_struct *work)
 /**
  * phy_mac_interrupt - MAC says the link has changed
  * @phydev: phy_device struct with changed link
- * @new_link: Link is Up/Down.
  *
- * Description: The MAC layer is able indicate there has been a change
- *   in the PHY link status. Set the new link status, and trigger the
- *   state machine, work a work queue.
+ * The MAC layer is able to indicate there has been a change in the PHY link
+ * status. Trigger the state machine and work a work queue.
  */
-void phy_mac_interrupt(struct phy_device *phydev, int new_link)
+void phy_mac_interrupt(struct phy_device *phydev)
 {
-	phydev->link = new_link;
-
 	/* Trigger a state machine change */
 	queue_work(system_power_efficient_wq, &phydev->phy_queue);
 }

include/linux/phy.h

@@ -964,7 +964,7 @@ int phy_drivers_register(struct phy_driver *new_driver, int n,
 void phy_state_machine(struct work_struct *work);
 void phy_change(struct phy_device *phydev);
 void phy_change_work(struct work_struct *work);
-void phy_mac_interrupt(struct phy_device *phydev, int new_link);
+void phy_mac_interrupt(struct phy_device *phydev);
 void phy_start_machine(struct phy_device *phydev);
 void phy_stop_machine(struct phy_device *phydev);
 void phy_trigger_machine(struct phy_device *phydev, bool sync);