virtio-net: don't respond to cpu hotplug notifier if we're not ready
authorJason Wang <jasowang@redhat.com>
Tue, 15 Oct 2013 03:18:58 +0000 (11:18 +0800)
committerDavid S. Miller <davem@davemloft.net>
Thu, 17 Oct 2013 19:53:09 +0000 (15:53 -0400)
commit3ab098df35f8b98b6553edc2e40234af512ba877
treec89a619a8bb0885f0f44d0071ac527b137194c1a
parent39bb93f88c5db54cbe1df0b0aa957b3a8f2227ed
virtio-net: don't respond to cpu hotplug notifier if we're not ready

We're trying to re-configure the affinity unconditionally in cpu hotplug
callback. This may lead the issue during resuming from s3/s4 since

- virt queues haven't been allocated at that time.
- it's unnecessary since thaw method will re-configure the affinity.

Fix this issue by checking the config_enable and do nothing is we're not ready.

The bug were introduced by commit 8de4b2f3ae90c8fc0f17eeaab87d5a951b66ee17
(virtio-net: reset virtqueue affinity when doing cpu hotplug).

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/virtio_net.c