linux-kernel - [PATCH] sfp: Fix error handing in sfp

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Message-ID: <20201031031053.25264-1-yuehaibing@huawei.com>
Date:   Sat, 31 Oct 2020 11:10:53 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <linux@...linux.org.uk>, <andrew@...n.ch>, <hkallweit1@...il.com>,
        <davem@...emloft.net>, <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH] sfp: Fix error handing in sfp_probe()

gpiod_to_irq() never return 0, but returns negative in
case of error, check it and set gpio_irq to 0.

Fixes: 73970055450e ("sfp: add SFP module support")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/net/phy/sfp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 1d18c10e8f82..34aa196b7465 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -2389,7 +2389,8 @@ static int sfp_probe(struct platform_device *pdev)
 			continue;
 
 		sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]);
-		if (!sfp->gpio_irq[i]) {
+		if (sfp->gpio_irq[i] < 0) {
+			sfp->gpio_irq[i] = 0;
 			sfp->need_poll = true;
 			continue;
 		}
-- 
2.17.1