bridge: Use is_link_local() in store_group_addr()

Parse the string into an array of bytes rather than ints, so we can
use is_link_local() rather than reimplementing it.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 8 deletions

diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index e157b0dbcd82..82385fd2f187 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -298,23 +298,18 @@ static ssize_t store_group_addr(struct device *d,
                                 const char *buf, size_t len)
 {
         struct net_bridge *br = to_bridge(d);
-        unsigned int new_addr[6];
+        u8 new_addr[6];
         int i;
 
         if (!capable(CAP_NET_ADMIN))
                 return -EPERM;
 
-        if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
+        if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
                    &new_addr[0], &new_addr[1], &new_addr[2],
                    &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
                 return -EINVAL;
 
-        /* Must be 01:80:c2:00:00:0X */
-        for (i = 0; i < 5; i++)
-                if (new_addr[i] != br_reserved_address[i])
-                        return -EINVAL;
-
-        if (new_addr[5] & ~0xf)
+        if (!is_link_local(new_addr))
                 return -EINVAL;
 
         if (new_addr[5] == 1 ||         /* 802.3x Pause address */