[PATCH 5.4 61/85] mlxsw: spectrum_acl: Fix mlxsw_sp_acl_tcam_group_add()s error path

[Greg Kroah-Hartman]

From: Ido Schimmel <ido...@nvidia.com>

[ Upstream commit 72865028582a678be1e05240e55d452e5c258eca ]

If mlxsw_sp_acl_tcam_group_id_get() fails, the mutex initialized earlier
is not destroyed.

Fix this by initializing the mutex after calling the function. This is
symmetric to mlxsw_sp_acl_tcam_group_del().

Fixes: 5ec2ee28d27b ("mlxsw: spectrum_acl: Introduce a mutex to guard region 
list updates")
Signed-off-by: Ido Schimmel <ido...@nvidia.com>
Reviewed-by: Jiri Pirko <j...@nvidia.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
index 295b27112d367..ec0d5a4a60a98 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
@@ -290,13 +290,14 @@ mlxsw_sp_acl_tcam_group_add(struct mlxsw_sp_acl_tcam 
*tcam,
        int err;
 
        group->tcam = tcam;
-       mutex_init(&group->lock);
        INIT_LIST_HEAD(&group->region_list);
 
        err = mlxsw_sp_acl_tcam_group_id_get(tcam, &group->id);
        if (err)
                return err;
 
+       mutex_init(&group->lock);
+
        return 0;
 }
 
-- 
2.25.1