On Tue, Mar 2, 2021 at 2:47 PM Jason Wang <jasowang@xxxxxxxxxx> wrote:
>
>
> On 2021/2/23 7:50 下午, Xie Yongji wrote:
> > Use vhost_dev->mutex to protect vhost device iotlb from
> > concurrent access.
> >
> > Fixes: 4c8cf318("vhost: introduce vDPA-based backend")
> > Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
> > ---
> > drivers/vhost/vdpa.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> > index c50079dfb281..5500e3bf05c1 100644
> > --- a/drivers/vhost/vdpa.c
> > +++ b/drivers/vhost/vdpa.c
> > @@ -723,6 +723,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev,
> > if (r)
> > return r;
> >
> > + mutex_lock(&dev->mutex);
>
>
> I think this should be done before the vhost_dev_check_owner() above.
>
Agree. Will do it in v5.
Thanks,
Yongji
