mbuf: fix error handling on pool creation

On error, the mempool object has to be freed, and rte_errno should be a
positive value.

Fixes: 152ca517900b ("mbuf: use default mempool handler from config")

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 80b1713..72f9280 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -173,10 +173,12 @@ rte_pktmbuf_pool_create(const char *name, unsigned n,
        if (mp == NULL)
                return NULL;
 
-       rte_errno = rte_mempool_set_ops_byname(mp,
-                       RTE_MBUF_DEFAULT_MEMPOOL_OPS, NULL);
-       if (rte_errno != 0) {
+       ret = rte_mempool_set_ops_byname(mp,
+               RTE_MBUF_DEFAULT_MEMPOOL_OPS, NULL);
+       if (ret != 0) {
                RTE_LOG(ERR, MBUF, "error setting mempool handler\n");
+               rte_mempool_free(mp);
+               rte_errno = -ret;
                return NULL;
        }
        rte_pktmbuf_pool_init(mp, &mbp_priv);