diff --git a/drivers/spi/spi_mpc8xxx.c b/drivers/spi/spi_mpc8xxx.c
index 1fb2a6ea328c..08065fb15817 100644
--- a/drivers/spi/spi_mpc8xxx.c
+++ b/drivers/spi/spi_mpc8xxx.c
@@ -1328,7 +1328,7 @@ static struct of_platform_driver of_mpc8xxx_spi_driver = {
 static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev)
 {
 	struct resource *mem;
-	unsigned int irq;
+	int irq;
 	struct spi_master *master;
 
 	if (!pdev->dev.platform_data)
@@ -1339,7 +1339,7 @@ static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq)
+	if (irq <= 0)
 		return -EINVAL;
 
 	master = mpc8xxx_spi_probe(&pdev->dev, mem, irq);