net: phy: ste10Xp: implement generic .handle_interrupt() callback

In an attempt to actually support shared IRQs in phylib, we now move the
responsibility of triggering the phylib state machine or just returning
IRQ_NONE, based on the IRQ status register, to the PHY driver. Having
3 different IRQ handling callbacks (.handle_interrupt(),
.did_interrupt() and .ack_interrupt() ) is confusing so let the PHY
driver implement directly an IRQ handler like any other device driver.
Make this driver follow the new convention.

Signed-off-by: Ioana Ciornei <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/phy/ste10Xp.c

···
 	return 0;
 }
 
+static irqreturn_t ste10Xp_handle_interrupt(struct phy_device *phydev)
+{
+	int irq_status;
+
+	irq_status = phy_read(phydev, MII_XCIIS);
+	if (irq_status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+
+	if (!(irq_status & MII_XIE_DEFAULT_MASK))
+		return IRQ_NONE;
+
+	phy_trigger_machine(phydev);
+
+	return IRQ_HANDLED;
+}
+
 static struct phy_driver ste10xp_pdriver[] = {
 {
 	.phy_id = STE101P_PHY_ID,
···
 	.config_init = ste10Xp_config_init,
 	.ack_interrupt = ste10Xp_ack_interrupt,
 	.config_intr = ste10Xp_config_intr,
+	.handle_interrupt = ste10Xp_handle_interrupt,
 	.suspend = genphy_suspend,
 	.resume = genphy_resume,
 }, {
···
 	.config_init = ste10Xp_config_init,
 	.ack_interrupt = ste10Xp_ack_interrupt,
 	.config_intr = ste10Xp_config_intr,
+	.handle_interrupt = ste10Xp_handle_interrupt,
 	.suspend = genphy_suspend,
 	.resume = genphy_resume,
 } };