[PATCH 5.17 494/772] mfd: ipaq-micro: Fix error check return value of platform_get_irq()

Greg Kroah-Hartman
2022-06-07T21:22:13Z

From: Lv Ruyi <lv.ruyi@zte.com.cn>

[ Upstream commit 3b49ae380ce1a3054e0c505dd9a356b82a5b48e8 ]

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@zte.com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220412085305.2533030-1-lv.ruyi@zte.com.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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",
--
2.35.1