[net-next 10/13] net/mlx5e: Vxlan, return values for add/del port

[Saeed Mahameed]

For a better API mlx5_vxlan_{add/del}_port can fail, make them return
error values.

Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
Reviewed-by: Or Gerlitz <ogerl...@mellanox.com>
---
 .../net/ethernet/mellanox/mlx5/core/vxlan.c   | 28 +++++++++++++------
 .../net/ethernet/mellanox/mlx5/core/vxlan.h   |  4 +--
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/vxlan.c 
b/drivers/net/ethernet/mellanox/mlx5/core/vxlan.c
index 502af3bdf088..f5353134542d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/vxlan.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/vxlan.c
@@ -104,29 +104,34 @@ struct mlx5_vxlan_port *mlx5_vxlan_lookup_port(struct 
mlx5_vxlan *vxlan, u16 por
        return vxlanp;
 }
 
-void mlx5_vxlan_add_port(struct mlx5_vxlan *vxlan, u16 port)
+int mlx5_vxlan_add_port(struct mlx5_vxlan *vxlan, u16 port)
 {
        struct mlx5_vxlan_port *vxlanp;
+       int ret = -ENOSPC;
 
        vxlanp = mlx5_vxlan_lookup_port(vxlan, port);
        if (vxlanp) {
                atomic_inc(&vxlanp->refcount);
-               return;
+               return 0;
        }
 
        if (vxlan->num_ports >= mlx5_vxlan_max_udp_ports(vxlan->mdev)) {
                mlx5_core_info(vxlan->mdev,
                               "UDP port (%d) not offloaded, max number of UDP 
ports (%d) are already offloaded\n",
                               port, mlx5_vxlan_max_udp_ports(vxlan->mdev));
-               return;
+               ret = -ENOSPC;
+               return ret;
        }
 
-       if (mlx5_vxlan_core_add_port_cmd(vxlan->mdev, port))
-               return;
+       ret = mlx5_vxlan_core_add_port_cmd(vxlan->mdev, port);
+       if (ret)
+               return ret;
 
        vxlanp = kzalloc(sizeof(*vxlanp), GFP_KERNEL);
-       if (!vxlanp)
+       if (!vxlanp) {
+               ret = -ENOMEM;
                goto err_delete_port;
+       }
 
        vxlanp->udp_port = port;
        atomic_set(&vxlanp->refcount, 1);
@@ -136,21 +141,25 @@ void mlx5_vxlan_add_port(struct mlx5_vxlan *vxlan, u16 
port)
        write_unlock_bh(&vxlan->lock);
 
        vxlan->num_ports++;
-       return;
+       return 0;
 
 err_delete_port:
        mlx5_vxlan_core_del_port_cmd(vxlan->mdev, port);
+       return ret;
 }
 
-void mlx5_vxlan_del_port(struct mlx5_vxlan *vxlan, u16 port)
+int mlx5_vxlan_del_port(struct mlx5_vxlan *vxlan, u16 port)
 {
        struct mlx5_vxlan_port *vxlanp;
        bool remove = false;
+       int ret = 0;
 
        write_lock_bh(&vxlan->lock);
        vxlanp = mlx5_vxlan_lookup_port_locked(vxlan, port);
-       if (!vxlanp)
+       if (!vxlanp) {
+               ret = -ENOENT;
                goto out_unlock;
+       }
 
        if (atomic_dec_and_test(&vxlanp->refcount)) {
                hash_del(&vxlanp->hlist);
@@ -165,6 +174,7 @@ void mlx5_vxlan_del_port(struct mlx5_vxlan *vxlan, u16 port)
                kfree(vxlanp);
                vxlan->num_ports--;
        }
+       return ret;
 }
 
 struct mlx5_vxlan *mlx5_vxlan_create(struct mlx5_core_dev *mdev)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/vxlan.h 
b/drivers/net/ethernet/mellanox/mlx5/core/vxlan.h
index 9d6327321814..fd874a30c4d0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/vxlan.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/vxlan.h
@@ -49,8 +49,8 @@ static inline bool mlx5_vxlan_allowed(struct mlx5_vxlan 
*vxlan)
 
 struct mlx5_vxlan *mlx5_vxlan_create(struct mlx5_core_dev *mdev);
 void mlx5_vxlan_destroy(struct mlx5_vxlan *vxlan);
-void mlx5_vxlan_add_port(struct mlx5_vxlan *vxlan, u16 port);
-void mlx5_vxlan_del_port(struct mlx5_vxlan *vxlan, u16 port);
+int mlx5_vxlan_add_port(struct mlx5_vxlan *vxlan, u16 port);
+int mlx5_vxlan_del_port(struct mlx5_vxlan *vxlan, u16 port);
 struct mlx5_vxlan_port *mlx5_vxlan_lookup_port(struct mlx5_vxlan *vxlan, u16 
port);
 
 #else
-- 
2.17.0