From b8f975545cdbcc316cf20e827e7966d4410b5c5a Mon Sep 17 00:00:00 2001
From: Jiri Pirko <jiri@mellanox.com>
Date: Sun, 24 Mar 2019 11:14:37 +0100
Subject: net: devlink: add port type spinlock

Add spinlock to protect port type and type_dev pointer consistency.
Without that, userspace may see inconsistent type and type_dev
combinations.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
v1->v2:
- rebased
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/devlink.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'include/net')

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 63de99e09f04..cb9b060033e1 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -16,6 +16,7 @@
 #include <linux/gfp.h>
 #include <linux/list.h>
 #include <linux/netdevice.h>
+#include <linux/spinlock.h>
 #include <net/net_namespace.h>
 #include <uapi/linux/devlink.h>
 
@@ -53,6 +54,9 @@ struct devlink_port {
 	struct devlink *devlink;
 	unsigned index;
 	bool registered;
+	spinlock_t type_lock; /* Protects type and type_dev
+			       * pointer consistency.
+			       */
 	enum devlink_port_type type;
 	enum devlink_port_type desired_type;
 	void *type_dev;
-- 
cgit v1.2.3-59-g8ed1b