netdev - [PATCH] revert async probing of VMBus network devices.

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Date:   Wed,  5 Jun 2019 11:51:14 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     netdev@...r.kernel.org
Cc:     linux-hyperv@...r.kernel.org,
        Stephen Hemminger <sthemmin@...rosoft.com>
Subject: [PATCH] revert async probing of VMBus network devices.

Doing asynchronous probing can lead to reordered network device names.
And because udev doesn't have any useful information to construct a
persistent name, this causes VM's to sporadically boot with reordered
device names and no connectivity.

This shows up on the Ubuntu image on larger VM's where 30% of the
time eth0 and eth1 get swapped.

Note: udev MAC address policy is disabled on Azure images
because the netvsc and PCI VF will have the same mac address.

Fixes: af0a5646cb8d ("use the new async probing feature for the hyperv drivers")
Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com>
---
 drivers/net/hyperv/netvsc_drv.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 06393b215102..1a2c32111106 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -2411,9 +2411,6 @@ static struct  hv_driver netvsc_drv = {
 	.id_table = id_table,
 	.probe = netvsc_probe,
 	.remove = netvsc_remove,
-	.driver = {
-		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
-	},
 };

 /*
-- 
2.20.1