# Re: \[PATCH net\] vhost: correctly check the iova range when waking virtqueue

- From: David Miller \<davem@davemloft.net\>
- Date: 2018-08-26 00:40:21 
- List: virtualization
- Page: https://ratatoskr.run/virtualization/2018/08/15812837
- Thread: https://ratatoskr.run/virtualization/2018/08/15812837/t.md

```text
From: Jason Wang <redacted>
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@redhat.com>
> Signed-off-by: Jason Wang <redacted>
> ---
> The patch is needed for -stable.

Applied and queued up for -stable, thanks Jason.
```