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 <haiya...@microsoft.com>
Reviewed-by: K. Y. Srinivasan <k...@microsoft.com>
---
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 d5a54da..c4e1e04 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,
--
1.7.4.1
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