From: K. Y. Srinivasan <kys@microsoft.com>
Date: Sat, 25 Mar 2017 03:54:36 +0000 (-0700)
Subject: netvsc: Fix a bug in sub-channel handling
X-Git-Tag: v4.14-rc1~960^3~337^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b1dd90cea725f794185a66c4e4ccfd4fb84632b5;p=platform%2Fkernel%2Flinux-rpi.git

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..98358252 100644
--- 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);