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@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@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

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Fri, 8 Apr 2022 11:22:46 +0800 you wrote:
> 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@huawei.com>
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
> 
> [...]

Here is the summary with links:
  - [-next] net: ethernet: mtk_eth_soc: fix return value check in mtk_wed_add_hw()
    https://git.kernel.org/netdev/net-next/c/b559edfaf3f3

You are awesome, thank you!
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