dummy: Add ndo_uninit().

commit 890fdf2a0cb88202d1427589db2cf29c1bdd3c1d upstream.

In register_netdevice(), when ndo_init() is successful and later
some error occurred, ndo_uninit() will be called.
So dummy deivce is desirable to implement ndo_uninit() method
to free percpu stats for this case.
And, ndo_uninit() is also called along with dev->destructor() when
device is unregistered, so in order to prevent dev->dstats from
being freed twice, dev->destructor is modified to free_netdev().

Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index a7c5e88..eeac9ca 100644 (file)
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -106,14 +106,14 @@ static int dummy_dev_init(struct net_device *dev)
        return 0;
 }
 
        return 0;
 }
 

-static void dummy_dev_free(struct net_device *dev)
+static void dummy_dev_uninit(struct net_device *dev)

 {
        free_percpu(dev->dstats);
 {
        free_percpu(dev->dstats);

-       free_netdev(dev);

 }
 
 static const struct net_device_ops dummy_netdev_ops = {
        .ndo_init               = dummy_dev_init,
 }
 
 static const struct net_device_ops dummy_netdev_ops = {
        .ndo_init               = dummy_dev_init,

+       .ndo_uninit             = dummy_dev_uninit,

        .ndo_start_xmit         = dummy_xmit,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_rx_mode        = set_multicast_list,
        .ndo_start_xmit         = dummy_xmit,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_rx_mode        = set_multicast_list,


@@ -127,7 +127,7 @@ static void dummy_setup(struct net_device *dev)
 
        /* Initialize the device structure. */
        dev->netdev_ops = &dummy_netdev_ops;
 
        /* Initialize the device structure. */
        dev->netdev_ops = &dummy_netdev_ops;

-       dev->destructor = dummy_dev_free;
+       dev->destructor = free_netdev;

 
        /* Fill in device structure with ethernet-generic values. */
        dev->tx_queue_len = 0;
 
        /* Fill in device structure with ethernet-generic values. */
        dev->tx_queue_len = 0;