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Yuho Choi
8907eb42c0
virtgpu_freeze() waits for the control and cursor queues to drain and
then deletes the virtqueues, but nothing tells the device to stop first.
del_vqs() frees the vring backing, but does not provide a generic device
quiesce operation. In particular, modern virtio-pci keeps enabled queues
active until the device is reset, so the device is left DRIVER_OK with
its queues pointing at memory that has been freed and may be reused while
the guest is suspended. virtio_device_restore() only resets the device
later, on resume.
Reset the device before deleting the virtqueues, the way
virtio_gpu_deinit() already does on removal.
Fixes: cad6a879a7 ("drm/virtio: Freeze and restore hooks to support suspend and resume")
Cc: [email protected]
Signed-off-by: Yuho Choi <[email protected]>
Signed-off-by: Dmitry Osipenko <[email protected]>
Link: https://patch.msgid.link/[email protected]