[PATCH] net/intel: allow fast-free to empty cache

[Bruce Richardson <bruce.richardson@intel.com>]

When freeing transmitted mbufs, there is no reason to send the freed
mbufs directly to the ring if the cache is empty - only if it is zero
size (in which case the cache pointer is NULL). Therefore, remove the
empty check and only check for a null cache pointer.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/intel/common/tx.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/intel/common/tx.h b/drivers/net/intel/common/tx.h
index d9cf4474fc..d361fe64ab 100644
--- a/drivers/net/intel/common/tx.h
+++ b/drivers/net/intel/common/tx.h
@@ -143,7 +143,7 @@ ci_tx_free_bufs_vec(struct ci_tx_queue *txq, ci_desc_done_fn desc_done, bool ctx
 		void **cache_objs;
 		struct rte_mempool_cache *cache = rte_mempool_default_cache(mp, rte_lcore_id());
 
-		if (!cache || cache->len == 0)
+		if (cache == NULL)
 			goto normal;
 
 		cache_objs = &cache->objs[cache->len];
-- 
2.43.0