netpoll: Add ndo_netpoll_setup

This patch adds ndo_netpoll_setup as the initialisation primitive
to complement ndo_netpoll_cleanup.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 4fbccc5f609a..fb20cc55ba52 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -744,6 +744,8 @@ struct net_device_ops {
                                                         unsigned short vid);
 #ifdef CONFIG_NET_POLL_CONTROLLER
         void                    (*ndo_poll_controller)(struct net_device *dev);
+        int                     (*ndo_netpoll_setup)(struct net_device *dev,
+                                                     struct netpoll_info *info);
         void                    (*ndo_netpoll_cleanup)(struct net_device *dev);
 #endif
         int                     (*ndo_set_vf_mac)(struct net_device *dev,
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index d10c249bcc8f..7de6dcad5d79 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -698,6 +698,7 @@ int netpoll_setup(struct netpoll *np)
         struct net_device *ndev = NULL;
         struct in_device *in_dev;
         struct netpoll_info *npinfo;
+        const struct net_device_ops *ops;
         unsigned long flags;
         int err;
 
@@ -797,6 +798,13 @@ int netpoll_setup(struct netpoll *np)
                 INIT_DELAYED_WORK(&npinfo->tx_work, queue_process);
 
                 atomic_set(&npinfo->refcnt, 1);
+
+                ops = np->dev->netdev_ops;
+                if (ops->ndo_netpoll_setup) {
+                        err = ops->ndo_netpoll_setup(ndev, npinfo);
+                        if (err)
+                                goto free_npinfo;
+                }
         } else {
                 npinfo = ndev->npinfo;
                 atomic_inc(&npinfo->refcnt);
@@ -817,6 +825,8 @@ int netpoll_setup(struct netpoll *np)
 
         return 0;
 
+free_npinfo:
+        kfree(npinfo);
 unlock:
         rtnl_unlock();
 put: