From: Jason Wang <jasowang@xxxxxxxxxx>
Date: Fri, 24 Aug 2018 16:53:13 +0800
> We don't wakeup the virtqueue if the first byte of pending iova range
> is the last byte of the range we just got updated. This will lead a
> virtqueue to wait for IOTLB updating forever. Fixing by correct the
> check and wake up the virtqueue in this case.
>
> Fixes: 6b1e6cc7855b ("vhost: new device IOTLB API")
> Reported-by: Peter Xu <peterx@xxxxxxxxxx>
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
> ---
> The patch is needed for -stable.
Applied and queued up for -stable, thanks Jason.
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