From 94f3e14e00fd43024b1c4d8e0c1e442db9b4d964 Mon Sep 17 00:00:00 2001
From: Chuhong Yuan <hslester96@gmail.com>
Date: Tue, 6 Aug 2019 09:59:50 +0800
Subject: mlx5: Use refcount_t for refcount

Reference counters are preferred to use refcount_t instead of
atomic_t.
This is because the implementation of refcount_t can prevent
overflows and detect possible use-after-free.
So convert atomic_t ref counters to refcount_t.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---
 include/linux/mlx5/driver.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'include/linux/mlx5')

diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 267b2bc0ca4a..0acd28f2e62c 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -47,6 +47,7 @@
 #include <linux/interrupt.h>
 #include <linux/idr.h>
 #include <linux/notifier.h>
+#include <linux/refcount.h>
 
 #include <linux/mlx5/device.h>
 #include <linux/mlx5/doorbell.h>
@@ -398,7 +399,7 @@ enum mlx5_res_type {
 
 struct mlx5_core_rsc_common {
 	enum mlx5_res_type	res;
-	atomic_t		refcount;
+	refcount_t		refcount;
 	struct completion	free;
 };
 
-- 
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