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Commit b3b32c94 authored by Heinz Graalfs's avatar Heinz Graalfs Committed by Rusty Russell
Browse files

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: default avatarHeinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: default avatarRusty 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