target/linux/generic/backport-5.10/736-v5.14-net-dsa-qca8k-fix-missing-unlock-on-error-in-qca8k-vlan.patch

   1 From 0d56e5c191b197e1d30a0a4c92628836dafced0f Mon Sep 17 00:00:00 2001
   2 From: Wei Yongjun <weiyongjun1@huawei.com>
   3 Date: Tue, 18 May 2021 11:24:13 +0000
   4 Subject: [PATCH] net: dsa: qca8k: fix missing unlock on error in
   5  qca8k_vlan_(add|del)
   6
   7 Add the missing unlock before return from function qca8k_vlan_add()
   8 and qca8k_vlan_del() in the error handling case.
   9
  10 Fixes: 028f5f8ef44f ("net: dsa: qca8k: handle error with qca8k_read operation")
  11 Reported-by: Hulk Robot <hulkci@huawei.com>
  12 Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
  13 Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
  14 Signed-off-by: David S. Miller <davem@davemloft.net>
  15 ---
  16  drivers/net/dsa/qca8k.c | 16 ++++++++++------
  17  1 file changed, 10 insertions(+), 6 deletions(-)
  18
  19 --- a/drivers/net/dsa/qca8k.c
  20 +++ b/drivers/net/dsa/qca8k.c
  21 @@ -506,8 +506,10 @@ qca8k_vlan_add(struct qca8k_priv *priv,
  22                 goto out;
  23
  24         reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
  25 -       if (reg < 0)
  26 -               return reg;
  27 +       if (reg < 0) {
  28 +               ret = reg;
  29 +               goto out;
  30 +       }
  31         reg |= QCA8K_VTU_FUNC0_VALID | QCA8K_VTU_FUNC0_IVL_EN;
  32         reg &= ~(QCA8K_VTU_FUNC0_EG_MODE_MASK << QCA8K_VTU_FUNC0_EG_MODE_S(port));
  33         if (untagged)
  34 @@ -519,7 +521,7 @@ qca8k_vlan_add(struct qca8k_priv *priv,
  35
  36         ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
  37         if (ret)
  38 -               return ret;
  39 +               goto out;
  40         ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
  41
  42  out:
  43 @@ -541,8 +543,10 @@ qca8k_vlan_del(struct qca8k_priv *priv,
  44                 goto out;
  45
  46         reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
  47 -       if (reg < 0)
  48 -               return reg;
  49 +       if (reg < 0) {
  50 +               ret = reg;
  51 +               goto out;
  52 +       }
  53         reg &= ~(3 << QCA8K_VTU_FUNC0_EG_MODE_S(port));
  54         reg |= QCA8K_VTU_FUNC0_EG_MODE_NOT <<
  55                         QCA8K_VTU_FUNC0_EG_MODE_S(port);
  56 @@ -564,7 +568,7 @@ qca8k_vlan_del(struct qca8k_priv *priv,
  57         } else {
  58                 ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
  59                 if (ret)
  60 -                       return ret;
  61 +                       goto out;
  62                 ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
  63         }
  64