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

[Jens Freimann <jfreimann@redhat.com>]

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. 

>
>> -	} 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
>>