[EXTERNAL] [PATCH] net/virtio-user: reset used index counter in dev reset

[Maxime Coquelin]

Hi,

On 9/6/24 12:14, Shiva Shankar Kommula wrote:
> Hello Maxime,
> could you please review the following change ?
> 
> Thanks
> 
>> Subject: [EXTERNAL] [PATCH] net/virtio-user: reset used index counter in dev
>> reset
>>
>> When the virtio device is reinitialized during ethdev reconfiguration, all the
>> virtio rings are recreated and repopulated on the device. Accordingly, reset the
>> used index counter value back to zero. Signed-off-by: Kommula Shiva Shankar
>> <kshankar@ marvell. com>
>> When the virtio device is reinitialized during ethdev reconfiguration, all the
>> virtio rings are recreated and repopulated on the device.
>> Accordingly, reset the used index counter value back to zero.

I think it needs to be backported to stable releases.
What about this?

Fixes: 48a4464029a7 ("net/virtio-user: support control VQ for packed")
Cc: stable at dpdk.org

>>
>> Signed-off-by: Kommula Shiva Shankar <kshankar at marvell.com>
>> ---
>>   drivers/net/virtio/virtio_user_ethdev.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/net/virtio/virtio_user_ethdev.c
>> b/drivers/net/virtio/virtio_user_ethdev.c
>> index ae6593ba0b..d60c7e188c 100644
>> --- a/drivers/net/virtio/virtio_user_ethdev.c
>> +++ b/drivers/net/virtio/virtio_user_ethdev.c
>> @@ -204,6 +204,7 @@ virtio_user_setup_queue_packed(struct virtqueue
>> *vq,
>>   	vring->device = (void *)(uintptr_t)used_addr;
>>   	dev->packed_queues[queue_idx].avail_wrap_counter = true;
>>   	dev->packed_queues[queue_idx].used_wrap_counter = true;
>> +	dev->packed_queues[queue_idx].used_idx = 0;
>>
>>   	for (i = 0; i < vring->num; i++)
>>   		vring->desc[i].flags = 0;
>> --
>> 2.43.0
>