Re: [PATCH v2] event/cnxk: fix incorrect mbuf offset calculation

[Jerin Jacob <jerinjacobk@gmail.com>]

On Tue, Oct 25, 2022 at 9:41 PM <pbhagavatula@marvell.com> wrote:
>
> From: Pavan Nikhilesh <pbhagavatula@marvell.com>
>
> Fix incorrect mbuf offset calculation when HEADROOM exceeds 128B
> while processing event vectors.
>
> Fixes: 7fbbc981d54f("event/cnxk: support vectorized Rx event fast path")
Cc: stable@dpdk.org


Applied to dpdk-next-net-eventdev/for-main. Thanks

>
> Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
> ---
>  v2 Changes:
>  - Remove internal Change-Id.
>
>  drivers/net/cnxk/cn10k_rx.h | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/cnxk/cn10k_rx.h b/drivers/net/cnxk/cn10k_rx.h
> index 46488d442e..f562a75245 100644
> --- a/drivers/net/cnxk/cn10k_rx.h
> +++ b/drivers/net/cnxk/cn10k_rx.h
> @@ -1201,9 +1201,11 @@ cn10k_nix_recv_pkts_vector(void *args, struct rte_mbuf **mbufs, uint16_t pkts,
>                         mbuf23 = vqsubq_u64(mbuf23, data_off);
>                 } else {
>                         mbuf01 =
> -                               vsubq_u64(vld1q_u64((uint64_t *)cq0), data_off);
> -                       mbuf23 = vsubq_u64(vld1q_u64((uint64_t *)(cq0 + 16)),
> -                                          data_off);
> +                               vsubq_u64(vld1q_u64((uint64_t *)cq0),
> +                                         vdupq_n_u64(sizeof(struct rte_mbuf)));
> +                       mbuf23 =
> +                               vsubq_u64(vld1q_u64((uint64_t *)(cq0 + 16)),
> +                                         vdupq_n_u64(sizeof(struct rte_mbuf)));
>                 }
>
>                 /* Move mbufs to scalar registers for future use */
> --
> 2.25.1
>