doc:networking: Update comment for dev_id field in netdevice.h

This patch updates the comment for 'dev_id' field in
'include/linux/netdevice.h' to reflect the intended
usage of 'dev_id'.

References: http://marc.info/?l=linux-netdev&m=136992115300526&w=2
References: http://marc.info/?l=linux-netdev&m=137062569014612&w=2

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

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 2ecb96d9a1e5..e5d65573b4d6 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1174,8 +1174,10 @@ struct net_device {
         unsigned char           addr_assign_type; /* hw address assignment type */
         unsigned char           addr_len;       /* hardware address length      */
         unsigned char           neigh_priv_len;
-        unsigned short          dev_id;         /* for shared network cards */
-
+        unsigned short          dev_id;         /* Used to differentiate devices
+                                                 * that share the same link
+                                                 * layer address
+                                                 */
         spinlock_t              addr_list_lock;
         struct netdev_hw_addr_list      uc;     /* Unicast mac addresses */
         struct netdev_hw_addr_list      mc;     /* Multicast mac addresses */