netdev - Re: [PATCH 11/21] vhost-vdpa: introduce asid based IOTLB

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Message-ID: <bc85dfe9-7689-2be1-b124-0f0529e1d8dc@redhat.com>
Date:   Wed, 30 Dec 2020 14:33:53 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Eli Cohen <elic@...dia.com>
Cc:     mst@...hat.com, eperezma@...hat.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, lulu@...hat.com, eli@...lanox.com,
        lingshan.zhu@...el.com, rob.miller@...adcom.com,
        stefanha@...hat.com, sgarzare@...hat.com
Subject: Re: [PATCH 11/21] vhost-vdpa: introduce asid based IOTLB


On 2020/12/29 下午8:05, Eli Cohen wrote:
>> +
>> +static int vhost_vdpa_remove_as(struct vhost_vdpa *v, u32 asid)
> The return value is never interpreted. I think it should either be made
> void or return values checked.


Right, will make it void.


>
>> +{
>> +	struct vhost_vdpa_as *as = asid_to_as(v, asid);
>> +
>> +	/* Remove default address space is not allowed */
>> +	if (asid == 0)
>> +		return -EINVAL;
> Can you explain why? I think you have a memory leak due to this as no
> one will ever free as with id 0.
>

Looks like a bug. Will remove this.

Thanks