[dpdk-dev] [PATCH 2/7] rwlock not released when the key exists

[mstolarchuk <mike.stolarchuk@bigswitch.com>]

Consisntly use a single exit path in the code,  have th various return values
set then call the exit path.
---
 lib/librte_hash/rte_cuckoo_hash.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c
index d1fbb0b..7606e3e 100644
--- a/lib/librte_hash/rte_cuckoo_hash.c
+++ b/lib/librte_hash/rte_cuckoo_hash.c
@@ -554,7 +554,7 @@ struct rte_hash *
 					LCORE_CACHE_SIZE, NULL);
 			if (n_slots == 0) {
 				ret = -ENOSPC;
-				goto failure;
+				goto finished;
 			}
 
 			cached_free_slots->len += n_slots;
@@ -566,7 +566,7 @@ struct rte_hash *
 	} else {
 		if (rte_ring_sc_dequeue(h->free_slots, &slot_id) != 0) {
 			ret = -ENOSPC;
-			goto failure;
+			goto finished;
 		}
 	}
 
@@ -588,7 +588,8 @@ struct rte_hash *
 				 * Return index where key is stored,
 				 * subtracting the first dummy index
 				 */
-				return prim_bkt->key_idx[i] - 1;
+                                ret = prim_bkt->key_idx[i] - 1;
+                                goto finished;
 			}
 		}
 	}
@@ -607,7 +608,8 @@ struct rte_hash *
 				 * Return index where key is stored,
 				 * subtracting the first dummy index
 				 */
-				return sec_bkt->key_idx[i] - 1;
+				ret = sec_bkt->key_idx[i] - 1;
+				goto finished;
 			}
 		}
 	}
@@ -649,9 +651,8 @@ struct rte_hash *
 		}
 
 		if (i != RTE_HASH_BUCKET_ENTRIES) {
-			if (h->add_key == ADD_KEY_MULTIWRITER)
-				rte_spinlock_unlock(h->multiwriter_lock);
-			return new_idx - 1;
+			ret = new_idx - 1;
+			goto finished;
 		}
 
 		/* Primary bucket full, need to make space for new entry
@@ -665,9 +666,8 @@ struct rte_hash *
 			prim_bkt->sig_current[ret] = sig;
 			prim_bkt->sig_alt[ret] = alt_hash;
 			prim_bkt->key_idx[ret] = new_idx;
-			if (h->add_key == ADD_KEY_MULTIWRITER)
-				rte_spinlock_unlock(h->multiwriter_lock);
-			return new_idx - 1;
+			ret = new_idx - 1;
+			goto finished;
 		}
 #if defined(RTE_ARCH_X86)
 	}
@@ -675,7 +675,7 @@ struct rte_hash *
 	/* Error in addition, store new slot back in the ring and return error */
 	enqueue_slot_back(h, cached_free_slots, (void *)((uintptr_t) new_idx));
 
-failure:
+finished:
 	if (h->add_key == ADD_KEY_MULTIWRITER)
 		rte_spinlock_unlock(h->multiwriter_lock);
 	return ret;
-- 
1.9.1