diff --git a/drivers/mfd/fsl-imx25-tsadc.c b/drivers/mfd/fsl-imx25-tsadc.c
index 85f7982..823595b 100644
--- a/drivers/mfd/fsl-imx25-tsadc.c
+++ b/drivers/mfd/fsl-imx25-tsadc.c
@@ -69,7 +69,7 @@ static int mx25_tsadc_setup_irq(struct platform_device *pdev,
 	int irq;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0)
+	if (irq < 0)
 		return irq;
 
 	tsadc->domain = irq_domain_add_simple(np, 2, 0, &mx25_tsadc_domain_ops,
@@ -89,7 +89,7 @@ static int mx25_tsadc_unset_irq(struct platform_device *pdev)
 	struct mx25_tsadc *tsadc = platform_get_drvdata(pdev);
 	int irq = platform_get_irq(pdev, 0);
 
-	if (irq) {
+	if (irq >= 0) {
 		irq_set_chained_handler_and_data(irq, NULL, NULL);
 		irq_domain_remove(tsadc->domain);
 	}