diff options
| author | Haiyang Zhang <haiyangz@microsoft.com> | 2016-03-23 14:54:48 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-23 21:51:08 -0400 |
| commit | 3f735131d9c2523eb54a6c5099fa8c60a4292d48 (patch) | |
| tree | 04a88fdbeb47170da18679d7d8bbf7c1876c57c2 /drivers | |
| parent | 5e82b4b2a0015ed0a659b22ef2ee3409a3c39e54 (diff) | |
| download | linux-3f735131d9c2523eb54a6c5099fa8c60a4292d48.tar.bz2 | |
hv_netvsc: Fix the order of num_sc_offered decrement
Reorder the code in netvsc_sc_open(), so num_sc_offered is only decremented
after vmbus_open() is called. This avoid pontential race of removing device
before all channels are setup.
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')
| -rw-r--r-- | drivers/net/hyperv/rndis_filter.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index d5a54da5d9c8..c4e1e0408433 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -986,12 +986,6 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc) nvscdev = hv_get_drvdata(new_sc->primary_channel->device_obj); - spin_lock_irqsave(&nvscdev->sc_lock, flags); - nvscdev->num_sc_offered--; - spin_unlock_irqrestore(&nvscdev->sc_lock, flags); - if (nvscdev->num_sc_offered == 0) - complete(&nvscdev->channel_init_wait); - if (chn_index >= nvscdev->num_chn) return; @@ -1004,6 +998,12 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc) if (ret == 0) nvscdev->chn_table[chn_index] = new_sc; + + spin_lock_irqsave(&nvscdev->sc_lock, flags); + nvscdev->num_sc_offered--; + spin_unlock_irqrestore(&nvscdev->sc_lock, flags); + if (nvscdev->num_sc_offered == 0) + complete(&nvscdev->channel_init_wait); } int rndis_filter_device_add(struct hv_device *dev, |