diff --git a/example/object/list_uploads.go b/example/object/list_uploads.go
index f2bf8aa..86d74c4 100644
--- a/example/object/list_uploads.go
+++ b/example/object/list_uploads.go
@@ -76,7 +76,6 @@ func main() {
 	name := "test/test_list_parts.go"
 	up := initUpload(c, name)
 	uploadID := up.UploadID
-	ctx := context.Background()
 	blockSize := 1024 * 1024 * 3
 
 	for i := 1; i < 5; i++ {
diff --git a/object.go b/object.go
index 1cea83f..787c382 100644
--- a/object.go
+++ b/object.go
@@ -635,7 +635,6 @@ func (s *ObjectService) getResumableUploadID(ctx context.Context, name string) (
 }
 
 func (s *ObjectService) checkUploadedParts(ctx context.Context, name, UploadID, filepath string, chunks []Chunk, partNum int) error {
-	var err error
 	var uploadedParts []Object
 	isTruncated := true
 	opt := &ObjectListPartsOptions{
@@ -657,34 +656,31 @@ func (s *ObjectService) checkUploadedParts(ctx context.Context, name, UploadID,
 		return err
 	}
 	defer fd.Close()
-	err = nil
+	// 某个分块出错, 重置chunks
+	ret := func(e error) error {
+		for _, chunk := range chunks {
+			chunk.Done = false
+		}
+		return e
+	}
 	for _, part := range uploadedParts {
 		partNumber := part.PartNumber
 		if partNumber > partNum {
-			err = errors.New("Part Number is not consistent")
-			break
+			return ret(errors.New("Part Number is not consistent"))
 		}
 		partNumber = partNumber - 1
 		fd.Seek(chunks[partNumber].OffSet, os.SEEK_SET)
-		bs, e := ioutil.ReadAll(io.LimitReader(fd, chunks[partNumber].Size))
-		if e != nil {
-			err = e
-			break
+		bs, err := ioutil.ReadAll(io.LimitReader(fd, chunks[partNumber].Size))
+		if err != nil {
+			return ret(err)
 		}
 		localMD5 := fmt.Sprintf("\"%x\"", md5.Sum(bs))
 		if localMD5 != part.ETag {
-			err = errors.New(fmt.Sprintf("CheckSum Failed in Part[%d]", part.PartNumber))
-			break
+			return ret(errors.New(fmt.Sprintf("CheckSum Failed in Part[%d]", part.PartNumber)))
 		}
 		chunks[partNumber].Done = true
 	}
-	// 某个分块出错, 重置chunks
-	if err != nil {
-		for _, chunk := range chunks {
-			chunk.Done = false
-		}
-	}
-	return err
+	return nil
 }
 
 // MultiUpload/Upload 为高级upload接口，并发分块上传