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authorKrishna Kumar <krkumar2@in.ibm.com>2011-07-20 03:56:02 +0000
committerDavid S. Miller <davem@davemloft.net>2011-07-21 21:29:34 -0700
commit2e66f55b3afa290337a47e6ea134ac071c5dd9a7 (patch)
tree8955f5e6c3502174768de8c51d480a0abbf51a40 /drivers/net/virtio_net.c
parent87c48fa3b4630905f98268dde838ee43626a060c (diff)
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>
Diffstat (limited to 'drivers/net/virtio_net.c')
-rw-r--r--drivers/net/virtio_net.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index fbea637eb74..0c7321c35ad 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -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);
}