[hyperv] Receive all VMBus messages in a poll

Allow for elision of transmitted TCP ACKs by handling all received
VMBus messages in each network device poll operation.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/drivers/net/netvsc.c b/src/drivers/net/netvsc.c
index bcab8a9ca653d6af26e83dae46dd36ab756843c3..8610339d26c8070ef16cd67df6308744c250b63d 100644 (file)
--- a/src/drivers/net/netvsc.c
+++ b/src/drivers/net/netvsc.c
@@ -435,9 +435,11 @@ static struct vmbus_channel_operations netvsc_channel_operations = {
  */
 static void netvsc_poll ( struct rndis_device *rndis ) {
        struct netvsc_device *netvsc = rndis->priv;
+       struct vmbus_device *vmdev = netvsc->vmdev;
 
        /* Poll VMBus device */
-       vmbus_poll ( netvsc->vmdev );
+       while ( vmbus_has_data ( vmdev ) )
+               vmbus_poll ( vmdev );
 }
 
 /**