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| author | Haiyang Zhang <haiyangz@microsoft.com> | 2013-12-20 16:52:31 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-21 22:23:06 -0500 |
| commit | a68f9614614749727286f675d15f1e09d13cb54a (patch) | |
| tree | 1236f0c9e306e2c527846addfb34f7690cc3163d /drivers/net | |
| parent | 965cdea825693c821d200e38fac9402cde6dce6a (diff) | |
| download | linux-a68f9614614749727286f675d15f1e09d13cb54a.tar.gz linux-a68f9614614749727286f675d15f1e09d13cb54a.tar.bz2 linux-a68f9614614749727286f675d15f1e09d13cb54a.zip | |
hyperv: Fix race between probe and open calls
Moving the register_netdev to the end of probe to prevent
possible open call happens before NetVSP is connected.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index f8135725bcf6..71baeb3ed905 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -261,9 +261,7 @@ int netvsc_recv_callback(struct hv_device *device_obj, struct sk_buff *skb; net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; - if (!net) { - netdev_err(net, "got receive callback but net device" - " not initialized yet\n"); + if (!net || net->reg_state != NETREG_REGISTERED) { packet->status = NVSP_STAT_FAIL; return 0; } @@ -435,19 +433,11 @@ static int netvsc_probe(struct hv_device *dev, SET_ETHTOOL_OPS(net, ðtool_ops); SET_NETDEV_DEV(net, &dev->device); - ret = register_netdev(net); - if (ret != 0) { - pr_err("Unable to register netdev.\n"); - free_netdev(net); - goto out; - } - /* Notify the netvsc driver of the new device */ device_info.ring_size = ring_size; ret = rndis_filter_device_add(dev, &device_info); if (ret != 0) { netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); - unregister_netdev(net); free_netdev(net); hv_set_drvdata(dev, NULL); return ret; @@ -456,7 +446,13 @@ static int netvsc_probe(struct hv_device *dev, netif_carrier_on(net); -out: + ret = register_netdev(net); + if (ret != 0) { + pr_err("Unable to register netdev.\n"); + rndis_filter_device_remove(dev); + free_netdev(net); + } + return ret; } |