linux-kernel - Re: [PATCH v3 1/2] vhost-vdpa: fix vhost_vdpa

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Date:   Sun, 11 Oct 2020 02:45:52 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     Si-Wei Liu <si-wei.liu@...cle.com>, lingshan.zhu@...el.com,
        joao.m.martins@...cle.com, boris.ostrovsky@...cle.com,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [PATCH v3 1/2] vhost-vdpa: fix vhost_vdpa_map() on error
 condition

On Sat, Oct 10, 2020 at 09:48:42AM +0800, Jason Wang wrote:
> 
> On 2020/10/3 下午1:02, Si-Wei Liu wrote:
> > vhost_vdpa_map() should remove the iotlb entry just added
> > if the corresponding mapping fails to set up properly.
> > 
> > Fixes: 4c8cf31885f6 ("vhost: introduce vDPA-based backend")
> > Signed-off-by: Si-Wei Liu <si-wei.liu@...cle.com>
> > ---
> >   drivers/vhost/vdpa.c | 3 +++
> >   1 file changed, 3 insertions(+)
> > 
> > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> > index 796fe97..0f27919 100644
> > --- a/drivers/vhost/vdpa.c
> > +++ b/drivers/vhost/vdpa.c
> > @@ -565,6 +565,9 @@ static int vhost_vdpa_map(struct vhost_vdpa *v,
> >   			      perm_to_iommu_flags(perm));
> >   	}
> > +	if (r)
> > +		vhost_iotlb_del_range(dev->iotlb, iova, iova + size - 1);
> > +
> >   	return r;
> >   }
> 
> 
> Acked-by: Jason Wang <jasowang@...hat.com>

Linus already merged this, I can't add your ack, sorry!

-- 
MST