[#156] metabase: Make freePotentialLocks() pass linter checks

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/local_object_storage/metabase/lock.go

@@ -138,57 +138,57 @@ func objectLocked(tx *bbolt.Tx, idCnr cid.ID, idObj oid.ID) bool {
 // Operation is very resource-intensive, which is caused by the admissibility
 // of multiple locks. Also, if we knew what objects are locked, it would be
 // possible to speed up the execution.
-//
-// nolint: gocognit
 func freePotentialLocks(tx *bbolt.Tx, idCnr cid.ID, locker oid.ID) error {
 	bucketLocked := tx.Bucket(bucketNameLocked)
-	if bucketLocked != nil {
-		key := make([]byte, cidSize)
-		idCnr.Encode(key)
+	if bucketLocked == nil {
+		return nil
+	}
 
-		bucketLockedContainer := bucketLocked.Bucket(key)
-		if bucketLockedContainer != nil {
-			keyLocker := objectKey(locker, key)
-			return bucketLockedContainer.ForEach(func(k, v []byte) error {
-				keyLockers, err := decodeList(v)
-				if err != nil {
-					return fmt.Errorf("decode list of lockers in locked bucket: %w", err)
-				}
+	key := make([]byte, cidSize)
+	idCnr.Encode(key)
 
-				for i := range keyLockers {
-					if bytes.Equal(keyLockers[i], keyLocker) {
-						if len(keyLockers) == 1 {
-							// locker was all alone
-							err = bucketLockedContainer.Delete(k)
-							if err != nil {
-								return fmt.Errorf("delete locked object record from locked bucket: %w", err)
-							}
-						} else {
-							// exclude locker
-							keyLockers = append(keyLockers[:i], keyLockers[i+1:]...)
+	bucketLockedContainer := bucketLocked.Bucket(key)
+	if bucketLockedContainer == nil {
+		return nil
+	}
 
-							v, err = encodeList(keyLockers)
-							if err != nil {
-								return fmt.Errorf("encode updated list of lockers: %w", err)
-							}
+	keyLocker := objectKey(locker, key)
+	return bucketLockedContainer.ForEach(func(k, v []byte) error {
+		keyLockers, err := decodeList(v)
+		if err != nil {
+			return fmt.Errorf("decode list of lockers in locked bucket: %w", err)
+		}
 
-							// update the record
-							err = bucketLockedContainer.Put(k, v)
-							if err != nil {
-								return fmt.Errorf("update list of lockers: %w", err)
-							}
-						}
+		for i := range keyLockers {
+			if bytes.Equal(keyLockers[i], keyLocker) {
+				if len(keyLockers) == 1 {
+					// locker was all alone
+					err = bucketLockedContainer.Delete(k)
+					if err != nil {
+						return fmt.Errorf("delete locked object record from locked bucket: %w", err)
+					}
+				} else {
+					// exclude locker
+					keyLockers = append(keyLockers[:i], keyLockers[i+1:]...)
 
-						return nil
+					v, err = encodeList(keyLockers)
+					if err != nil {
+						return fmt.Errorf("encode updated list of lockers: %w", err)
+					}
+
+					// update the record
+					err = bucketLockedContainer.Put(k, v)
+					if err != nil {
+						return fmt.Errorf("update list of lockers: %w", err)
 					}
 				}
 
 				return nil
-			})
+			}
 		}
-	}
 
-	return nil
+		return nil
+	})
 }
 
 // IsLockedPrm groups the parameters of IsLocked operation.