[PATCH] sfp: Fix error handing in sfp_probe()

[YueHaibing]

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 <yuehaib...@huawei.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