Commit b3b32c94 authored Oct 29, 2013 by Heinz Graalfs Committed by Rusty Russell Oct 29, 2013

virtio_ring: add new function virtqueue_is_broken()



Add new function virtqueue_is_broken(). Callers of virtqueue_get_buf()
should check for a broken queue.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

parent 53c18c99

drivers/virtio/virtio_ring.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -851,4 +851,12 @@ 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");

include/linux/virtio.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -73,6 +73,8 @@ 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