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virtio: add ability to iterate over vqs

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commit 24a7e4d20783c0514850f24a5c41ede46ab058f0 upstream.

For cleanup it's helpful to be able to simply scan all vqs and discard
all data. Add an iterator to do that.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael S. Tsirkin 2018-04-20 20:22:40 +03:00 committed by Greg Kroah-Hartman
parent 311a886f34
commit a4fc9c518e
1 changed files with 3 additions and 0 deletions
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3
include/linux/virtio.h
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@ -124,6 +124,9 @@ int virtio_device_freeze(struct virtio_device *dev);
int virtio_device_restore(struct virtio_device *dev); int virtio_device_restore(struct virtio_device *dev);
#endif #endif
#define virtio_device_for_each_vq(vdev, vq) \
list_for_each_entry(vq, &vdev->vqs, list)
/** /**
* virtio_driver - operations for a virtio I/O driver * virtio_driver - operations for a virtio I/O driver
* @driver: underlying device driver (populate name and owner). * @driver: underlying device driver (populate name and owner).