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authorHeinz Graalfs <graalfs@linux.vnet.ibm.com>2013-10-29 00:10:19 +0100
committerRusty Russell <rusty@rustcorp.com.au>2013-10-29 01:58:17 +0100
commitb3b32c94133621c9ba7e4c8f29ec7533f2f4d8ec (patch)
treed24065656240c707ec76d6932e2f00554dc52713
parentvirtio_test: verify if virtqueue_kick() succeeded (diff)
downloadlinux-b3b32c94133621c9ba7e4c8f29ec7533f2f4d8ec.tar.xz
linux-b3b32c94133621c9ba7e4c8f29ec7533f2f4d8ec.zip
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>
-rw-r--r--drivers/virtio/virtio_ring.c8
-rw-r--r--include/linux/virtio.h2
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index b47142723119..f47777582ce5 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -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");
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 9b4de15fcb2f..e4abb84199be 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -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