On Wed, Jan 20, 2021 at 11:44 AM Jason Wang <jasowang@xxxxxxxxxx> wrote:
>
>
> On 2021/1/19 下午12:59, Xie Yongji wrote:
> > Introduce a 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 | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> > index 448be7875b6d..4a241d380c40 100644
> > --- a/drivers/vhost/vdpa.c
> > +++ b/drivers/vhost/vdpa.c
> > @@ -49,6 +49,7 @@ struct vhost_vdpa {
> > struct eventfd_ctx *config_ctx;
> > int in_batch;
> > struct vdpa_iova_range range;
> > + struct mutex mutex;
>
>
> Let's use the device mutex like what vhost_process_iotlb_msg() did.
>
Looks fine.
Thanks,
Yongji
