[ 082/167] [PATCH] dummy: Add ndo_uninit().

Ben Hutchings
2012-05-09T05:56:29Z

From: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com>

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>
---
drivers/net/dummy.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index d5c6d92..442d91a 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -107,14 +107,14 @@ static int dummy_dev_init(struct net_device *dev)
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_netdev(dev);
}

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,
@@ -128,7 +128,7 @@ static void dummy_setup(struct net_device *dev)

/* 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;
--
1.7.10