netdev - [PATCH net-stable 01/24] hv_netvsc: Fix the real number of queues of non-vRSS cases

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Date:   Mon, 14 May 2018 15:32:00 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, Haiyang Zhang <haiyangz@...rosoft.com>
Subject: [PATCH net-stable 01/24] hv_netvsc: Fix the real number of queues of non-vRSS cases

From: Haiyang Zhang <haiyangz@...rosoft.com>

commit 6450f8f269a9271985e4a8c13920b7e4cf21c0f3 upstream.

For older hosts without multi-channel (vRSS) support, and some error
cases, we still need to set the real number of queues to one.
This patch adds this missing setting.

Fixes: 8195b1396ec8 ("hv_netvsc: fix deadlock on hotplug")
Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
Reviewed-by: Stephen Hemminger <sthemmin@...rosoft.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
---
 drivers/net/hyperv/netvsc_drv.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index c849de3cb046..e40be71df9d6 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1931,6 +1931,12 @@ static int netvsc_probe(struct hv_device *dev,
 	/* We always need headroom for rndis header */
 	net->needed_headroom = RNDIS_AND_PPI_SIZE;
 
+	/* Initialize the number of queues to be 1, we may change it if more
+	 * channels are offered later.
+	 */
+	netif_set_real_num_tx_queues(net, 1);
+	netif_set_real_num_rx_queues(net, 1);
+
 	/* Notify the netvsc driver of the new device */
 	memset(&device_info, 0, sizeof(device_info));
 	device_info.ring_size = ring_size;
-- 
2.17.0