[PATCH -next] net: ethernet: mtk_eth_soc: fix return value check in mtk_wed_add_hw()

[Yang Yingliang]

If syscon_regmap_lookup_by_phandle() fails, it never return NULL pointer,
change the check to IS_ERR().

Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Reported-by: Hulk Robot <hulkci at huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang at huawei.com>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index f0eacf819cd9..5d510ac24f2a 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -813,7 +813,7 @@ void mtk_wed_add_hw(struct device_node *np, struct mtk_eth *eth,
 		return;
 
 	regs = syscon_regmap_lookup_by_phandle(np, NULL);
-	if (!regs)
+	if (IS_ERR(regs))
 		return;
 
 	rcu_assign_pointer(mtk_soc_wed_ops, &wed_ops);
-- 
2.25.1