net/i40e: fix AVX512 fast-free path

[ upstream commit 1ad4bea0d73a7671095c2c675f9bb8b19503ac06 ]

In i40e_tx_free_bufs_avx512 fast-free path, when cache is NULL,
non fast-free path is being executed. Fixed the bug by calling
rte_mempool_generic_put API that handles the cache==NULL case.

Fixes: 5171b4e ("net/i40e: optimize Tx by using AVX512")

Signed-off-by: Kamalakshitha Aligeri <kamalakshitha.aligeri@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Feifei Wang <feifei.wang2@arm.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>

.mailmap

@@ -679,6 +679,7 @@ Kai Ji <kai.ji@intel.com>
 Kaiwen Deng <kaiwenx.deng@intel.com>
 Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
 Kamalakannan R <kamalakannan.r@intel.com>
+Kamalakshitha Aligeri <kamalakshitha.aligeri@arm.com>
 Kamil Bednarczyk <kamil.bednarczyk@intel.com>
 Kamil Chalupnik <kamilx.chalupnik@intel.com>
 Kamil Rytarowski <kamil.rytarowski@caviumnetworks.com>

drivers/net/i40e/i40e_rxtx_vec_avx512.c

@@ -906,16 +906,13 @@ i40e_tx_free_bufs_avx512(struct i40e_tx_queue *txq)
 		struct rte_mempool_cache *cache = rte_mempool_default_cache(mp,
 				rte_lcore_id());
 
-		if (!cache || cache->len == 0)
-			goto normal;
-
-		cache_objs = &cache->objs[cache->len];
-
-		if (n > RTE_MEMPOOL_CACHE_MAX_SIZE) {
-			rte_mempool_ops_enqueue_bulk(mp, (void *)txep, n);
+		if (!cache || n > RTE_MEMPOOL_CACHE_MAX_SIZE) {
+			rte_mempool_generic_put(mp, (void *)txep, n, cache);
 			goto done;
 		}
 
+		cache_objs = &cache->objs[cache->len];
+
 		/* The cache follows the following algorithm
 		 *   1. Add the objects to the cache
 		 *   2. Anything greater than the cache min value (if it
@@ -947,7 +944,6 @@ i40e_tx_free_bufs_avx512(struct i40e_tx_queue *txq)
 		goto done;
 	}
 
-normal:
 	m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
 	if (likely(m)) {
 		free[0] = m;