Re: [dpdk-dev] [PATCH] ring: fix error vlaue of tail in the peek API for ST mode

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

> -----Original Message-----
> From: Feifei Wang <feifei.wang2@arm.com>
> Sent: Sunday, June 28, 2020 7:24 AM
> To: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>; Ananyev, Konstantin <konstantin.ananyev@intel.com>
> Cc: dev@dpdk.org; nd@arm.com; Feifei Wang <feifei.wang2@arm.com>; stable@dpdk.org
> Subject: [PATCH] ring: fix error vlaue of tail in the peek API for ST mode
> 
> The value of *tail should be the prod->tail not prod->head. After
> modification, it can record 'tail' so head/tail can be updated
> accordingly.
> 
> Fixes: 664ff4b1729b ("ring: introduce peek style API")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
> ---
>  lib/librte_ring/rte_ring_peek_c11_mem.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/librte_ring/rte_ring_peek_c11_mem.h b/lib/librte_ring/rte_ring_peek_c11_mem.h
> index 99321f124..283c7e70b 100644
> --- a/lib/librte_ring/rte_ring_peek_c11_mem.h
> +++ b/lib/librte_ring/rte_ring_peek_c11_mem.h
> @@ -40,7 +40,7 @@ __rte_ring_st_get_tail(struct rte_ring_headtail *ht, uint32_t *tail,
>  	RTE_ASSERT(n >= num);
>  	num = (n >= num) ? num : 0;
> 
> -	*tail = h;
> +	*tail = t;
>  	return num;
>  }
> 
> --

Thanks for the fix.
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> 2.17.1