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virtio: reenable config if freezing device failed

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Currently, we don't reenable the config if freezing the device failed.

For example, virtio-mem currently doesn't support suspend+resume, and
trying to freeze the device will always fail. Afterwards, the device
will no longer respond to resize requests, because it won't get notified
about config changes.

Let's fix this by re-enabling the config if freezing fails.

Fixes: 22b7050a02 ("virtio: defer config changed notifications")
Cc: <stable@kernel.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20240213135425.795001-1-david@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
David Hildenbrand 2024-02-13 14:54:25 +01:00 committed by Michael S. Tsirkin
parent 9588e7fc51
commit 310227f428
1 changed files with 3 additions and 1 deletions
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4
drivers/virtio/virtio.c
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@ -510,8 +510,10 @@ int virtio_device_freeze(struct virtio_device *dev)
if (drv && drv->freeze) {
ret = drv->freeze(dev);
if (ret)
if (ret) {
virtio_config_enable(dev);
return ret;
}
}
if (dev->config->destroy_avq)