diff options
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 15 | ||||
| -rw-r--r-- | include/linux/virtio.h | 2 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 1e443629f76d..4d08f45a9c29 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -865,4 +865,19 @@ bool virtqueue_is_broken(struct virtqueue *_vq) } EXPORT_SYMBOL_GPL(virtqueue_is_broken); +/* + * This should prevent the device from being used, allowing drivers to + * recover. You may need to grab appropriate locks to flush. + */ +void virtio_break_device(struct virtio_device *dev) +{ + struct virtqueue *_vq; + + list_for_each_entry(_vq, &dev->vqs, list) { + struct vring_virtqueue *vq = to_vvq(_vq); + vq->broken = true; + } +} +EXPORT_SYMBOL_GPL(virtio_break_device); + MODULE_LICENSE("GPL"); diff --git a/include/linux/virtio.h b/include/linux/virtio.h index e4abb84199be..b46671e28de2 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -106,6 +106,8 @@ static inline struct virtio_device *dev_to_virtio(struct device *_dev) int register_virtio_device(struct virtio_device *dev); void unregister_virtio_device(struct virtio_device *dev); +void virtio_break_device(struct virtio_device *dev); + /** * virtio_driver - operations for a virtio I/O driver * @driver: underlying device driver (populate name and owner). |