netvsc: Fix a bug in sub-channel handling

All netvsc channels are handled via NAPI. Setup the "read mode" correctly
for the netvsc sub-channels.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 91b3bcf..9835825 100644 (file)
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -1002,6 +1002,11 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc)
        if (!nvchan->mrc.buf)
                return;
 
+       /* Because the device uses NAPI, all the interrupt batching and
+        * control is done via Net softirq, not the channel handling
+        */
+       set_channel_read_mode(new_sc, HV_CALL_ISR);
+
        ret = vmbus_open(new_sc, nvscdev->ring_size * PAGE_SIZE,
                         nvscdev->ring_size * PAGE_SIZE, NULL, 0,
                         netvsc_channel_cb, nvchan);