linux-kernel - [PATCH] power: supply: cpcap-charger: fix incorrect return value check

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Message-Id: <1510501922-19163-1-git-send-email-bianpan2016@163.com>
Date:   Sun, 12 Nov 2017 23:52:02 +0800
From:   Pan Bian <bianpan2016@....com>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pan Bian <bianpan2016@....com>
Subject: [PATCH] power: supply: cpcap-charger: fix incorrect return value check

Function platform_get_irq_byname() returns a negative error code on
failure, and a zero or positive number on success. However, in function
cpcap_usb_init_irq(), positive IRQ numbers are also taken as error
cases. Use "if (irq < 0)" instead of "if (!irq)" to validate the return
value of platform_get_irq_byname().

Signed-off-by: Pan Bian <bianpan2016@....com>
---
 drivers/power/supply/cpcap-charger.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c
index 11a0763..e4905be 100644
--- a/drivers/power/supply/cpcap-charger.c
+++ b/drivers/power/supply/cpcap-charger.c
@@ -484,7 +484,7 @@ static int cpcap_usb_init_irq(struct platform_device *pdev,
 	int irq, error;
 
 	irq = platform_get_irq_byname(pdev, name);
-	if (!irq)
+	if (irq < 0)
 		return -ENODEV;
 
 	error = devm_request_threaded_irq(ddata->dev, irq, NULL,
-- 
1.9.1