diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 5cfbb6205885..35a545777bfc 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -2254,8 +2254,8 @@ static int ksz_irq_phy_setup(struct ksz_device *dev)
 		if (BIT(phy) & ds->phys_mii_mask) {
 			irq = irq_find_mapping(dev->ports[phy].pirq.domain,
 					       PORT_SRC_PHY_INT);
-			if (irq < 0) {
-				ret = irq;
+			if (!irq) {
+				ret = -EINVAL;
 				goto out;
 			}
 			ds->user_mii_bus->irq[phy] = irq;
@@ -2479,8 +2479,8 @@ static int ksz_pirq_setup(struct ksz_device *dev, u8 p)
 	snprintf(pirq->name, sizeof(pirq->name), "port_irq-%d", p);
 
 	pirq->irq_num = irq_find_mapping(dev->girq.domain, p);
-	if (pirq->irq_num < 0)
-		return pirq->irq_num;
+	if (!pirq->irq_num)
+		return -EINVAL;
 
 	return ksz_irq_common_setup(dev, pirq);
 }