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

[Xin Long]

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

Signed-off-by: Xin Long <lucien....@gmail.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