[PATCH] net: mellanox: mlxsw: fix error return code of mlxsw_sp_router_nve_promote_decap()

[Jia-Ju Bai]

When fib_entry is NULL, no error return code of
mlxsw_sp_router_nve_promote_decap() is assigned.
To fix this bug, err is assigned with -EINVAL in this case.

Reported-by: TOTE Robot <os...@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 9ce90841f92d..7b260e25df1b 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -1981,8 +1981,10 @@ int mlxsw_sp_router_nve_promote_decap(struct mlxsw_sp 
*mlxsw_sp, u32 ul_tb_id,
        fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id,
                                                         ul_proto, ul_sip,
                                                         type);
-       if (!fib_entry)
+       if (!fib_entry) {
+               err = -EINVAL;
                goto out;
+       }
 
        fib_entry->decap.tunnel_index = tunnel_index;
        fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
-- 
2.17.1