Re: [PATCH] net/mlx4_en: ensure rx_desc updating reaches HW before prod db updating

[jianchao.wang]

Dear all

Thanks for the kindly response and reviewing. That's really appreciated.

On 01/13/2018 12:46 AM, Eric Dumazet wrote:
>> Does this need to be dma_wmb(), and should it be in
>> mlx4_en_update_rx_prod_db ?
>>
> +1 on dma_wmb()
> 
> On what architecture bug was observed ?
This issue was observed on x86-64.
And I will send a new patch, in which replace wmb() with dma_wmb(), to customer
to confirm.

Thanks
Jianchao