Spec requires a device reset during cleanup, so do it and avoid warn
in virtio core. And detach unused buffers to avoid memory leak.

Signed-off-by: Jason Wang <jasow...@redhat.com>
---
Changes from V1: detach unused buffers for sts queue.
---
 drivers/virtio/virtio_input.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
index 60e2a16..c96944b 100644
--- a/drivers/virtio/virtio_input.c
+++ b/drivers/virtio/virtio_input.c
@@ -313,6 +313,7 @@ err_init_vq:
 static void virtinput_remove(struct virtio_device *vdev)
 {
        struct virtio_input *vi = vdev->priv;
+       void *buf;
        unsigned long flags;
 
        spin_lock_irqsave(&vi->lock, flags);
@@ -320,6 +321,9 @@ static void virtinput_remove(struct virtio_device *vdev)
        spin_unlock_irqrestore(&vi->lock, flags);
 
        input_unregister_device(vi->idev);
+       vdev->config->reset(vdev);
+       while ((buf = virtqueue_detach_unused_buf(vi->sts)) != NULL)
+               kfree(buf);
        vdev->config->del_vqs(vdev);
        kfree(vi);
 }
-- 
2.1.4

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