From: Chuhong Yuan <hslester96@gmail.com>
Date: Sat, 3 Aug 2019 00:48:28 +0800
Subject: net/mlx5e: Use refcount_t for refcount
Patch-mainline: v5.4-rc1
Git-commit: b51c225e6c4e987e131b8b1332f66969382bf328
References: jsc#SLE-8464

refcount_t is better for reference counters since its
implementation can prevent overflows.
So convert atomic_t ref counters to refcount_t.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/lib/vxlan.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/vxlan.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/vxlan.c
@@ -32,6 +32,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/refcount.h>
 #include <linux/mlx5/driver.h>
 #include <net/vxlan.h>
 #include "mlx5_core.h"
@@ -48,7 +49,7 @@ struct mlx5_vxlan {
 
 struct mlx5_vxlan_port {
 	struct hlist_node hlist;
-	atomic_t refcount;
+	refcount_t refcount;
 	u16 udp_port;
 };
 
@@ -113,7 +114,7 @@ int mlx5_vxlan_add_port(struct mlx5_vxla
 
 	vxlanp = mlx5_vxlan_lookup_port(vxlan, port);
 	if (vxlanp) {
-		atomic_inc(&vxlanp->refcount);
+		refcount_inc(&vxlanp->refcount);
 		return 0;
 	}
 
@@ -137,7 +138,7 @@ int mlx5_vxlan_add_port(struct mlx5_vxla
 	}
 
 	vxlanp->udp_port = port;
-	atomic_set(&vxlanp->refcount, 1);
+	refcount_set(&vxlanp->refcount, 1);
 
 	spin_lock_bh(&vxlan->lock);
 	hash_add(vxlan->htable, &vxlanp->hlist, port);
@@ -170,7 +171,7 @@ int mlx5_vxlan_del_port(struct mlx5_vxla
 		goto out_unlock;
 	}
 
-	if (atomic_dec_and_test(&vxlanp->refcount)) {
+	if (refcount_dec_and_test(&vxlanp->refcount)) {
 		hash_del(&vxlanp->hlist);
 		remove = true;
 	}