[PATCH] pata-rb532-cf: platform_get_irq() failure ignored

[Roel Kluin <roel.kluin@gmail.com>]

------------------------------>8-------------8<---------------------------------
platform_get_irq() can return -ENXIO, but since 'irq' is an unsigned int, it
does not show when the IRQ resource wasn't found.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
---
diff --git a/drivers/ata/pata_rb532_cf.c b/drivers/ata/pata_rb532_cf.c
index ebfcda2..fe8178c 100644
--- a/drivers/ata/pata_rb532_cf.c
+++ b/drivers/ata/pata_rb532_cf.c
@@ -173,11 +173,12 @@ static __devinit int rb532_pata_driver_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
+	ret = platform_get_irq(pdev, 0);
+	if (ret <= 0) {
 		dev_err(&pdev->dev, "no IRQ resource found\n");
 		return -ENOENT;
 	}
+	irq = ret;
 
 	gpio = irq_to_gpio(irq);
 	if (gpio < 0) {