netdev - [PATCHv3 net-next 3/6] bridge: simplify the stp_state_store by calling store_bridge

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Message-Id: <8c14a891d0a8bcea071d4e5305776a5c5cd9fd17.1460131308.git.lucien.xin@gmail.com>
Date:	Sat,  9 Apr 2016 00:03:30 +0800
From:	Xin Long <lucien.xin@...il.com>
To:	network dev <netdev@...r.kernel.org>,
	bridge@...ts.linux-foundation.org
Cc:	davem@...emloft.net,
	Stephen Hemminger <stephen@...workplumber.org>,
	nikolay@...ulusnetworks.com
Subject: [PATCHv3 net-next 3/6] bridge: simplify the stp_state_store by calling store_bridge_parm

There are some repetitive codes in stp_state_store, we can remove
them by calling store_bridge_parm.

Signed-off-by: Xin Long <lucien.xin@...il.com>
---
 net/bridge/br_sysfs_br.c | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index 137cd3b..f9d484e 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -128,27 +128,21 @@ static ssize_t stp_state_show(struct device *d,
 }
 
 
-static ssize_t stp_state_store(struct device *d,
-			       struct device_attribute *attr, const char *buf,
-			       size_t len)
+static int set_stp_state(struct net_bridge *br, unsigned long val)
 {
-	struct net_bridge *br = to_bridge(d);
-	char *endp;
-	unsigned long val;
-
-	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
-		return -EPERM;
-
-	val = simple_strtoul(buf, &endp, 0);
-	if (endp == buf)
-		return -EINVAL;
-
 	if (!rtnl_trylock())
 		return restart_syscall();
 	br_stp_set_enabled(br, val);
 	rtnl_unlock();
 
-	return len;
+	return 0;
+}
+
+static ssize_t stp_state_store(struct device *d,
+			       struct device_attribute *attr, const char *buf,
+			       size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_stp_state);
 }
 static DEVICE_ATTR_RW(stp_state);
 
-- 
2.1.0