Re: [dpdk-dev] [PATCH v3 2/2] distributor: fix additional check on no of workers

["Hunt, David" <david.hunt@intel.com>]

Hi Harman,

On 05/07/2019 11:05, Harman Kalra wrote:
> No of workers should never exceed RTE_MAX_LCORE.
> RTE_DIST_ALG_SINGLE also require no of workers check.
>
> Fixes: 775003ad2f96 ("distributor: add new burst-capable library")
> Cc: stable@dpdk.org
>
> Signed-off-by: Harman Kalra <hkalra@marvell.com>
> ---
>   lib/librte_distributor/rte_distributor.c | 11 ++++++-----
>   1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/lib/librte_distributor/rte_distributor.c b/lib/librte_distributor/rte_distributor.c
> index 208abfb1d..bfcc536fd 100644
> --- a/lib/librte_distributor/rte_distributor.c
> +++ b/lib/librte_distributor/rte_distributor.c
> @@ -595,6 +595,12 @@ rte_distributor_create_v1705(const char *name,
>   	RTE_BUILD_BUG_ON((sizeof(*d) & RTE_CACHE_LINE_MASK) != 0);
>   	RTE_BUILD_BUG_ON((RTE_DISTRIB_MAX_WORKERS & 7) != 0);
>   
> +	if (name == NULL || num_workers >=
> +		(unsigned int)RTE_MIN(RTE_DISTRIB_MAX_WORKERS, RTE_MAX_LCORE)) {
> +		rte_errno = EINVAL;
> +		return NULL;
> +	}
> +
>   	if (alg_type == RTE_DIST_ALG_SINGLE) {
>   		d = malloc(sizeof(struct rte_distributor));
>   		if (d == NULL) {
> @@ -612,11 +618,6 @@ rte_distributor_create_v1705(const char *name,
>   		return d;
>   	}
>   
> -	if (name == NULL || num_workers >= RTE_DISTRIB_MAX_WORKERS) {
> -		rte_errno = EINVAL;
> -		return NULL;
> -	}
> -
>   	snprintf(mz_name, sizeof(mz_name), RTE_DISTRIB_PREFIX"%s", name);
>   	mz = rte_memzone_reserve(mz_name, sizeof(*d), socket_id, NO_FLAGS);
>   	if (mz == NULL) {


Builds OK, runs OK. Change makes sense, also good to move the check to 
the new location.

Acked-by: David Hunt <david.hunt@intel.com>