net: phy: improve and inline phy_change

Now that phy_mac_interrupt() doesn't call phy_change() any longer it's
called from phy_interrupt() only. Therefore phy_interrupt_is_valid()
returns true always and the check can be removed.
In case of PHY_HALTED phy_interrupt() bails out immediately,
therefore the second check for PHY_HALTED including the call to
phy_disable_interrupts() can be removed.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phy.c

@@ -723,25 +723,26 @@ static int phy_disable_interrupts(struct phy_device *phydev)
 }
 
 /**
- * phy_change - Called by the phy_interrupt to handle PHY changes
- * @phydev: phy_device struct that interrupted
+ * phy_interrupt - PHY interrupt handler
+ * @irq: interrupt line
+ * @phy_dat: phy_device pointer
+ *
+ * Description: Handle PHY interrupt
  */
-static irqreturn_t phy_change(struct phy_device *phydev)
+static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 {
-	if (phy_interrupt_is_valid(phydev)) {
-		if (phydev->drv->did_interrupt &&
-		    !phydev->drv->did_interrupt(phydev))
-			return IRQ_NONE;
+	struct phy_device *phydev = phy_dat;
 
-		if (phydev->state == PHY_HALTED)
-			if (phy_disable_interrupts(phydev))
-				goto phy_err;
-	}
+	if (PHY_HALTED == phydev->state)
+		return IRQ_NONE;		/* It can't be ours.  */
+
+	if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev))
+		return IRQ_NONE;
 
 	/* reschedule state queue work to run as soon as possible */
 	phy_trigger_machine(phydev);
 
-	if (phy_interrupt_is_valid(phydev) && phy_clear_interrupt(phydev))
+	if (phy_clear_interrupt(phydev))
 		goto phy_err;
 	return IRQ_HANDLED;
 
@@ -750,24 +751,6 @@ static irqreturn_t phy_change(struct phy_device *phydev)
 	return IRQ_NONE;
 }
 
-/**
- * phy_interrupt - PHY interrupt handler
- * @irq: interrupt line
- * @phy_dat: phy_device pointer
- *
- * Description: When a PHY interrupt occurs, the handler disables
- * interrupts, and uses phy_change to handle the interrupt.
- */
-static irqreturn_t phy_interrupt(int irq, void *phy_dat)
-{
-	struct phy_device *phydev = phy_dat;
-
-	if (PHY_HALTED == phydev->state)
-		return IRQ_NONE;		/* It can't be ours.  */
-
-	return phy_change(phydev);
-}
-
 /**
  * phy_enable_interrupts - Enable the interrupts from the PHY side
  * @phydev: target phy_device struct
@@ -846,7 +829,7 @@ void phy_stop(struct phy_device *phydev)
 	phy_state_machine(&phydev->state_queue.work);
 
 	/* Cannot call flush_scheduled_work() here as desired because
-	 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
+	 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
 	 * will not reenable interrupts.
 	 */
 }