Add new function virtqueue_is_broken(). Callers of virtqueue_get_buf()
should check for a broken queue.
Signed-off-by: Heinz Graalfs <graa...@linux.vnet.ibm.com>
---
drivers/virtio/virtio_ring.c | 8 ++++++++
include/linux/virtio.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index a7e0eec..7eb844b 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -848,4 +848,12 @@ unsigned int virtqueue_get_vring_size(struct virtqueue
*_vq)
}
EXPORT_SYMBOL_GPL(virtqueue_get_vring_size);
+bool virtqueue_is_broken(struct virtqueue *_vq)
+{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+
+ return vq->broken;
+}
+EXPORT_SYMBOL_GPL(virtqueue_is_broken);
+
MODULE_LICENSE("GPL");
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 4557e8a..f15f6e7 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -76,6 +76,8 @@ void *virtqueue_detach_unused_buf(struct virtqueue *vq);
unsigned int virtqueue_get_vring_size(struct virtqueue *vq);
+bool virtqueue_is_broken(struct virtqueue *vq);
+
/**
* virtio_device - representation of a device using virtio
* @index: unique position on the virtio bus
--
1.8.3.1
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