net: phy: mscc: consider interrupt source in interrupt handler

Trigger the respective interrupt handler functionality only if the
related interrupt source bit is set.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mscc/mscc_main.c

@@ -1437,7 +1437,10 @@ static irqreturn_t vsc8584_handle_interrupt(struct phy_device *phydev)
 	if (irq_status < 0 || !(irq_status & MII_VSC85XX_INT_MASK_MASK))
 		return IRQ_NONE;
 
+	if (irq_status & MII_VSC85XX_INT_MASK_EXT)
 		vsc8584_handle_macsec_interrupt(phydev);
+
+	if (irq_status & MII_VSC85XX_INT_MASK_LINK_CHG)
 		phy_mac_interrupt(phydev);
 
 	return IRQ_HANDLED;