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| author | David Hildenbrand <david@redhat.com> | 2024-02-13 14:54:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-13 12:50:16 +0200 |
| commit | 5908fb34c0cf62c0f25f916d50d00582b053e077 (patch) | |
| tree | 47bfa51c1857b96a0fbfde6dcee0d415a0957b86 | |
| parent | 4d0adb19dc8aba90f2298560fd65871f1afbd2ca (diff) | |
| download | linux-stable-5908fb34c0cf62c0f25f916d50d00582b053e077.tar.gz linux-stable-5908fb34c0cf62c0f25f916d50d00582b053e077.tar.bz2 linux-stable-5908fb34c0cf62c0f25f916d50d00582b053e077.zip | |
virtio: reenable config if freezing device failed
commit 310227f42882c52356b523e2f4e11690eebcd2ab upstream.
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: 22b7050a024d ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/virtio/virtio.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index 89935105df49..3a16ac6b47fc 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -376,13 +376,19 @@ EXPORT_SYMBOL_GPL(unregister_virtio_device); int virtio_device_freeze(struct virtio_device *dev) { struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); + int ret; virtio_config_disable(dev); dev->failed = dev->config->get_status(dev) & VIRTIO_CONFIG_S_FAILED; - if (drv && drv->freeze) - return drv->freeze(dev); + if (drv && drv->freeze) { + ret = drv->freeze(dev); + if (ret) { + virtio_config_enable(dev); + return ret; + } + } return 0; } |