Re: [PATCH V3 12/13] HV/Netvsc: Add Isolation VM support for netvsc driver

[Tianyu Lan <ltykernel@xxxxxxxxx>]

On 8/20/2021 2:14 AM, Michael Kelley wrote:
> > @@ -477,6 +521,15 @@ static int netvsc_init_buf(struct hv_device *device,
> >                 goto cleanup;
> >         }
> >
> > +       if (hv_isolation_type_snp()) {
> > +               vaddr = netvsc_remap_buf(net_device->send_buf, buf_size);
> > +               if (!vaddr)
> > +                       goto cleanup;
> I don't think this error case is handled correctly.  Doesn't the remapping
> of the recv buf need to be undone?
Yes, actually I thought to return error here and free_netvsc_device() 
will help to unmap recv_buffer finally. But I forget to set ret = 
-ENOMEM when add netvsc_remap_buf() helper.