RE: [dpdk-dev] [PATCH] ring: fix error return value when creating ring

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

> The error value returned by rte_ring_create_elem() should be positive
> integers. However, if the rte_ring_get_memsize_elem() function fails,
> a negative number is returned and is directly used as the return value.
> As a result, this will cause the external call to check the return
> value to fail(like called by rte_mempool_create()).
> 
> Fixes: a182620042aa ("ring: get size in memory")
> Cc: stable@dpdk.org
> 
> Reported-by: Nan Zhou <zhounan14@huawei.com>
> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> ---
>  lib/ring/rte_ring.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/ring/rte_ring.c b/lib/ring/rte_ring.c
> index f17bd966be..185f9be798 100644
> --- a/lib/ring/rte_ring.c
> +++ b/lib/ring/rte_ring.c
> @@ -267,7 +267,7 @@ rte_ring_create_elem(const char *name, unsigned int esize, unsigned int count,
> 
>  	ring_size = rte_ring_get_memsize_elem(esize, count);
>  	if (ring_size < 0) {
> -		rte_errno = ring_size;
> +		rte_errno = -ring_size;
>  		return NULL;
>  	}
> 
> --

Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> 2.27.0