RE: [PATCH V2 3/3] RDMA/siw: Call llist_reverse_order in siw_run_sq

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> -----Original Message-----
> From: Guoqing Jiang <guoqing.jiang@xxxxxxxxx>
> Sent: Monday, 21 August 2023 10:48
> To: Bernard Metzler <BMT@xxxxxxxxxxxxxx>; jgg@xxxxxxxx; leon@xxxxxxxxxx
> Cc: linux-rdma@xxxxxxxxxxxxxxx
> Subject: [EXTERNAL] [PATCH V2 3/3] RDMA/siw: Call llist_reverse_order in
> siw_run_sq
> 
> We can call the function to get fifo list.
> 
> Signed-off-by: Guoqing Jiang <guoqing.jiang@xxxxxxxxx>
> ---
>  drivers/infiniband/sw/siw/siw_qp_tx.c | 12 +-----------
>  1 file changed, 1 insertion(+), 11 deletions(-)
> 
> diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c
> b/drivers/infiniband/sw/siw/siw_qp_tx.c
> index 4b292e0504f1..eb3d438828e2 100644
> --- a/drivers/infiniband/sw/siw/siw_qp_tx.c
> +++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
> @@ -1229,17 +1229,7 @@ int siw_run_sq(void *data)
>  			break;
> 
>  		active = llist_del_all(&tx_task->active);
> -		/*
> -		 * llist_del_all returns a list with newest entry first.
> -		 * Re-order list for fairness among QP's.
> -		 */
> -		while (active) {
> -			struct llist_node *tmp = active;
> -
> -			active = llist_next(active);
> -			tmp->next = fifo_list;
> -			fifo_list = tmp;
> -		}
> +		fifo_list = llist_reverse_order(active);
>  		while (fifo_list) {
>  			qp = container_of(fifo_list, struct siw_qp, tx_list);
>  			fifo_list = llist_next(fifo_list);
> --
> 2.35.3

Oh yes, that function already exists. Many thanks!
I'd keep the comment, since it might be not obvious why we
reverse the list.

Acked-by: Bernard Metzler <bmt@xxxxxxxxxxxxxx>




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