net: dsa: mv88e6xxx: Decode ATU problem interrupt

When there is a problem with the ATU, an interrupt can be
generated. Trap this interrupt and decode the registers to determine
what the problem was, then log the error.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -3976,11 +3976,15 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 			if (err)
 				goto out_g1_irq;
 		}
+
+		err = mv88e6xxx_g1_atu_prob_irq_setup(chip);
+		if (err)
+			goto out_g2_irq;
 	}
 
 	err = mv88e6xxx_mdios_register(chip, np);
 	if (err)
-		goto out_g2_irq;
+		goto out_g1_atu_prob_irq;
 
 	err = mv88e6xxx_register_switch(chip);
 	if (err)
@@ -3990,6 +3994,8 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 
 out_mdio:
 	mv88e6xxx_mdios_unregister(chip);
+out_g1_atu_prob_irq:
+	mv88e6xxx_g1_atu_prob_irq_free(chip);
 out_g2_irq:
 	if (chip->info->g2_irqs > 0 && chip->irq > 0)
 		mv88e6xxx_g2_irq_free(chip);
@@ -4013,6 +4019,7 @@ static void mv88e6xxx_remove(struct mdio_device *mdiodev)
 	mv88e6xxx_mdios_unregister(chip);
 
 	if (chip->irq > 0) {
+		mv88e6xxx_g1_atu_prob_irq_free(chip);
 		if (chip->info->g2_irqs > 0)
 			mv88e6xxx_g2_irq_free(chip);
 		mutex_lock(&chip->reg_lock);