[PATCH] net/virtio-net: reverse unregistering on exit

[Pierre Morel <pmorel@linux.vnet.ibm.com>]

Hi,

I got a problem with virtio-net in a QEMU guest.

When virtio-net is used as a module in a guest and the network is
activated, removing the virtio-net modules produces a kernel error:

[ 2375.624949] Last Breaking-Event-Address:
[ 2375.624954]  [<00000000001453d4>] __cpuhp_remove_state+0x84/0x1a8
[ 2375.624959] ---[ end trace cc9fd68b89f5235a ]---
[ 2375.624966] Error: Removing state 163 which has instances left.
[ 2375.624985] ------------[ cut here ]------------

The problem is produced by an inversion in the order of unregistering
the driver and the hotplug state machine callbacks in virtio_net_driver_exit.

This patch solves the problem by first unregistering the virtio_net_driver
before unregistering the hotplug state machine callbacks.

Best regards,

Pierre Morel

Pierre Morel (1):
  net/virtio-net: reverse unregistering on exit

 drivers/net/virtio_net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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2.7.4