[PATCH] mfd: fix error check return value of platform_get_irq()

[cgel . zte]

From: Lv Ruyi <lv.ruyi@xxxxxxxxxx>

platform_get_irq() return negative value on failure, so null check of
irq is incorrect. Fix it by comparing whether it is less than zero.

Fixes: dcc21cc09e3c ("mfd: Add driver for Atmel Microcontroller on iPaq h3xxx")
Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: Lv Ruyi <lv.ruyi@xxxxxxxxxx>
---
 drivers/mfd/ipaq-micro.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/ipaq-micro.c b/drivers/mfd/ipaq-micro.c
index e92eeeb67a98..4cd5ecc72211 100644
--- a/drivers/mfd/ipaq-micro.c
+++ b/drivers/mfd/ipaq-micro.c
@@ -403,7 +403,7 @@ static int __init micro_probe(struct platform_device *pdev)
 	micro_reset_comm(micro);
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq)
+	if (irq < 0)
 		return -EINVAL;
 	ret = devm_request_irq(&pdev->dev, irq, micro_serial_isr,
 			       IRQF_SHARED, "ipaq-micro",
-- 
2.25.1