netdev - Re: [RFC PATCH 18/24] vhost-vdpa: support ASID based IOTLB API

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Date:   Fri, 9 Oct 2020 11:59:10 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Eugenio Perez Martin <eperezma@...hat.com>
Cc:     Michael Tsirkin <mst@...hat.com>, Cindy Lu <lulu@...hat.com>,
        kvm list <kvm@...r.kernel.org>,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Miller <rob.miller@...adcom.com>,
        lingshan.zhu@...el.com, Harpreet Singh Anand <hanand@...inx.com>,
        mhabets@...arflare.com, eli@...lanox.com,
        Adrian Moreno Zapata <amorenoz@...hat.com>,
        Maxime Coquelin <maxime.coquelin@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>
Subject: Re: [RFC PATCH 18/24] vhost-vdpa: support ASID based IOTLB API


On 2020/9/28 下午11:44, Eugenio Perez Martin wrote:
>> -                            u64 iova, u64 size)
>> +static int vhost_vdpa_unmap(struct vhost_vdpa *v,
>> +                           struct vhost_iotlb *iotlb,
>> +                           u64 iova, u64 size)
>>   {
>>          struct vdpa_device *vdpa = v->vdpa;
>>          const struct vdpa_config_ops *ops = vdpa->config;
>> +       u32 asid = (iotlb);
>> +
>> +       if (!iotlb)
>> +               return -EINVAL;
> This should be reorder to check for (!iotlb) before use at `asid =
> iotlb_to_asid()`, isn't it?
>
> Thanks!
>

Yes, will fix in the next version.

Thanks