Re: [dpdk-dev] [PATCH v2 2/2] Revert "net/virtio-user: fail if cq used with packed vq"

[Maxime Coquelin <maxime.coquelin@redhat.com>]

On 1/10/19 3:58 PM, Jens Freimann wrote:
> On Thu, Jan 10, 2019 at 10:40:25PM +0800, Tiwei Bie wrote:
>> On Thu, Jan 10, 2019 at 02:17:51PM +0100, Jens Freimann wrote:
>>> This reverts commit 5e4e7a7524a30c176bd6b1789ab30963f27f2681.
>>>
>>> Not a clean revert, I had to resolve a conflict due to
>>>   616ea5519 net/virtio-user: fix packed vq option parsing
>>>
>>> Signed-off-by: Jens Freimann <jfreimann@redhat.com>
>>> ---
>>>  drivers/net/virtio/virtio_user/virtio_user_dev.c | 11 +++--------
>>>  1 file changed, 3 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c 
>>> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
>>> index 49fcf48b9..b7059cb1e 100644
>>> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
>>> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
>>> @@ -478,15 +478,10 @@ virtio_user_dev_init(struct virtio_user_dev 
>>> *dev, char *path, int queues,
>>>      if (!in_order)
>>>          dev->unsupported_features |= (1ull << VIRTIO_F_IN_ORDER);
>>>
>>> -    if (packed_vq) {
>>> -        if (cq) {
>>> -            PMD_INIT_LOG(ERR, "control vq not supported yet with "
>>> -                      "packed virtqueues\n");
>>> -            return -1;
>>> -        }
>>
>> I think it's natural to drop above code in the same patch that
>> introduces the control vq support.
> 
> I just split it out because Maxime requested it.

Yeah, disagreements happen. :)

I understand this is not a clean revert anyway, so feel free to keep it
in a single patch.

Thanks,
Maxime

>>
>>> -    } else {
>>> +    if (packed_vq)
>>> +        dev->device_features |= (1ull << VIRTIO_F_RING_PACKED);
>>
>> We shouldn't add this bit into device_features like this.
>> We just need this:
> 
> ok
> 
> regards,
> Jens
>>
>>     if (!packed_vq)
>>         dev->unsupported_features |= (1ull << VIRTIO_F_RING_PACKED);
>>
>>
>>> +    else
>>>          dev->unsupported_features |= (1ull << VIRTIO_F_RING_PACKED);
>>> -    }
>>>
>>>      if (dev->mac_specified)
>>>          dev->frontend_features |= (1ull << VIRTIO_NET_F_MAC);
>>> -- 
>>> 2.17.2
>>>