linux-kernel - [PATCH] virtio-net: fix module unloading

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Date:   Mon, 24 Jul 2017 15:38:32 +0200
From:   Andrew Jones <drjones@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     mst@...hat.com, jasowang@...hat.com,
        virtualization@...ts.linux-foundation.org,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH] virtio-net: fix module unloading

Unregister the driver before removing multi-instance hotplug
callbacks. This order avoids the warning issued from
__cpuhp_remove_state_cpuslocked when the number of remaining
instances isn't yet zero.

Fixes: 8017c279196a ("net/virtio-net: Convert to hotplug state machine")
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Andrew Jones <drjones@...hat.com>
---
 drivers/net/virtio_net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 99a26a9efec1..f41ab0ea942a 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2743,9 +2743,9 @@ module_init(virtio_net_driver_init);
 
 static __exit void virtio_net_driver_exit(void)
 {
+	unregister_virtio_driver(&virtio_net_driver);
 	cpuhp_remove_multi_state(CPUHP_VIRT_NET_DEAD);
 	cpuhp_remove_multi_state(virtionet_online);
-	unregister_virtio_driver(&virtio_net_driver);
 }
 module_exit(virtio_net_driver_exit);
 
-- 
2.13.3