Re: [dpdk-stable] [PATCH] vdpa/mlx5: fix completion queue assertion

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

On 9/2/20 10:34 AM, Matan Azrad wrote:
> The CQ configuration enables the collapse feature in HW what cause HW to
> write all the completions in the first CQE.
> When this feature is enabled the HW doesn't switch the owner bit when it
> starts a new cycle of the CQ, not like working without the collapse
> feature.
> 
> The current SW CQ polling wrongly added an assertion to validate the
> owner bit switch what causes a panic in debug mode.
> 
> Remove the aforementioned assertion.
> 
> Fixes: c5f714e50b0e ("vdpa/mlx5: optimize completion queue poll")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Matan Azrad <matan@nvidia.com>
> Acked-by: Xueming Li <xuemingl@nvidia.com>
> ---
>  drivers/vdpa/mlx5/mlx5_vdpa_event.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_event.c b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
> index 5a2d4fb..742ee62 100644
> --- a/drivers/vdpa/mlx5/mlx5_vdpa_event.c
> +++ b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
> @@ -205,8 +205,6 @@
>  	comp = (cur_wqe_counter + 1u - next_wqe_counter) & cq_mask;
>  	if (comp) {
>  		cq->cq_ci += comp;
> -		MLX5_ASSERT(!!(cq->cq_ci & cq_size) ==
> -			    MLX5_CQE_OWNER(last_word.op_own));
>  		MLX5_ASSERT(MLX5_CQE_OPCODE(last_word.op_own) !=
>  			    MLX5_CQE_INVALID);
>  		if (unlikely(!(MLX5_CQE_OPCODE(last_word.op_own) ==
> 

Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks,
Maxime