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virtio_net: Fix panic in virtnet_remove 

Fix a panic in virtnet_remove. unregister_netdev has already
freed up the netdev (and virtnet_info) due to dev->destructor
being set, while virtnet_info is still required. Remove
virtnet_free altogether, and move the freeing of the per-cpu
statistics from virtnet_free to virtnet_remove.

Tested patch below.

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Krishna Kumar 2011-07-20 03:56:02 +00:00 committed by David S. Miller
parent 87c48fa3b4
commit 2e66f55b3a
1 changed files with 1 additions and 9 deletions
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10
drivers/net/virtio_net.c
View File

@ -705,14 +705,6 @@ static void virtnet_netpoll(struct net_device *dev)
}
#endif
static void virtnet_free(struct net_device *dev)
{
struct virtnet_info *vi = netdev_priv(dev);
free_percpu(vi->stats);
free_netdev(dev);
}
static int virtnet_open(struct net_device *dev)
{
struct virtnet_info *vi = netdev_priv(dev);
@ -959,7 +951,6 @@ static int virtnet_probe(struct virtio_device *vdev)
/* Set up network device as normal. */
dev->netdev_ops = &virtnet_netdev;
dev->features = NETIF_F_HIGHDMA;
dev->destructor = virtnet_free;
SET_ETHTOOL_OPS(dev, &virtnet_ethtool_ops);
SET_NETDEV_DEV(dev, &vdev->dev);
@ -1122,6 +1113,7 @@ static void __devexit virtnet_remove(struct virtio_device *vdev)
while (vi->pages)
__free_pages(get_a_page(vi, GFP_KERNEL), 0);
free_percpu(vi->stats);
free_netdev(vi->dev);
}