diff options
| author | Haiyang Zhang | 2012-06-04 06:42:38 +0000 |
|---|---|---|
| committer | David S. Miller | 2012-06-04 13:50:38 -0400 |
| commit | dc5cd894cace7bda4a743487a9f87d59a3f0a095 (patch) | |
| tree | ecb62686a8cb1764b7ca49c61ef9dfc22eb6d8b9 | |
| parent | 9ec0db71af04f4560e27a3c2f5a0411ba3155198 (diff) | |
net/hyperv: Use wait_event on outstanding sends during device removal
Change the busy-waiting/udelay to wait_event on outstanding sends.
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>
| -rw-r--r-- | drivers/net/hyperv/hyperv_net.h | 1 | ||||
| -rw-r--r-- | drivers/net/hyperv/netvsc.c | 12 |
2 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 4ffcd57b011b..2857ab078aac 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -478,6 +478,7 @@ struct netvsc_device { u32 nvsp_version; atomic_t num_outstanding_sends; + wait_queue_head_t wait_drain; bool start_remove; bool destroy; /* diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 8b919471472f..0c569831db5a 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -42,6 +42,7 @@ static struct netvsc_device *alloc_net_device(struct hv_device *device) if (!net_device) return NULL; + init_waitqueue_head(&net_device->wait_drain); net_device->start_remove = false; net_device->destroy = false; net_device->dev = device; @@ -387,12 +388,8 @@ int netvsc_device_remove(struct hv_device *device) spin_unlock_irqrestore(&device->channel->inbound_lock, flags); /* Wait for all send completions */ - while (atomic_read(&net_device->num_outstanding_sends)) { - dev_info(&device->device, - "waiting for %d requests to complete...\n", - atomic_read(&net_device->num_outstanding_sends)); - udelay(100); - } + wait_event(net_device->wait_drain, + atomic_read(&net_device->num_outstanding_sends) == 0); netvsc_disconnect_vsp(net_device); @@ -486,6 +483,9 @@ static void netvsc_send_completion(struct hv_device *device, num_outstanding_sends = atomic_dec_return(&net_device->num_outstanding_sends); + if (net_device->destroy && num_outstanding_sends == 0) + wake_up(&net_device->wait_drain); + if (netif_queue_stopped(ndev) && !net_device->start_remove && (hv_ringbuf_avail_percent(&device->channel->outbound) > RING_AVAIL_PERCENT_HIWATER || |