target/linux/generic/backport-5.15/702-v5.19-12-net-ethernet-mtk_eth_soc-fix-return-value-check-in-m.patch

   1 From: Yang Yingliang <yangyingliang@huawei.com>
   2 Date: Fri, 8 Apr 2022 11:22:46 +0800
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: fix return value check in
   4  mtk_wed_add_hw()
   5
   6 If syscon_regmap_lookup_by_phandle() fails, it never return NULL pointer,
   7 change the check to IS_ERR().
   8
   9 Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
  10 Reported-by: Hulk Robot <hulkci@huawei.com>
  11 Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14
  15 --- a/drivers/net/ethernet/mediatek/mtk_wed.c
  16 +++ b/drivers/net/ethernet/mediatek/mtk_wed.c
  17 @@ -816,7 +816,7 @@ void mtk_wed_add_hw(struct device_node *
  18                 return;
  19
  20         regs = syscon_regmap_lookup_by_phandle(np, NULL);
  21 -       if (!regs)
  22 +       if (IS_ERR(regs))
  23                 return;
  24
  25         rcu_assign_pointer(mtk_soc_wed_ops, &wed_ops);