From: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Date: Thu, 2 Aug 2018 00:35:04 +0000 (+0100)
Subject: mempool: check for zero size creation
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=b2a4654f082b;p=dpdk.git

mempool: check for zero size creation

Currently, a mempool can be created if the number of
objects is zero. However, in this scenario,
rte_mempool_create should return NULL,
as the mempool created is useless otherwise.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
---

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 8c8b9f8097..a24a14887d 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -916,6 +916,12 @@ rte_mempool_create_empty(const char *name, unsigned n, unsigned elt_size,
 
 	mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list);
 
+	/* asked for zero items */
+	if (n == 0) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
 	/* asked cache too big */
 	if (cache_size > RTE_MEMPOOL_CACHE_MAX_SIZE ||
 	    CALC_CACHE_FLUSHTHRESH(cache_size) > n) {