diff --git a/mbtk/mbtk_logd/common.c b/mbtk/mbtk_logd/common.c
index 50177f1..000e680 100755
--- a/mbtk/mbtk_logd/common.c
+++ b/mbtk/mbtk_logd/common.c
@@ -82,7 +82,7 @@
 
     while (pdst >= dst )                     //当pdst大于dst则表明dst这个字符串还没有找完
     {
-        if (tmp=(char *)strstr(pdst, psrc = src))  //使用strstr帮助寻找，找到保存到tmp
+        if ((tmp=(char *)strstr(pdst, psrc = src)))  //使用strstr帮助寻找，找到保存到tmp
         return tmp;
 
         pdst--;
@@ -190,12 +190,12 @@
  */
 int get_rotate_file(int fd, char *base_file, struct file_list_t *_file_list)
 {
-    char old_name[32] = {0}; 
+    char old_name[32] = {0};
     char new_name[32] = {0};
 
-    
+
     int rotate_file_count_max = 0;
-    
+
     if(_file_list->total == -1 || _file_list->total == 0 || _file_list->total > ROTATE_FILE_COUNT_MAX)
     {
         rotate_file_count_max = ROTATE_FILE_COUNT_MAX;
@@ -204,18 +204,18 @@
     {
         rotate_file_count_max = _file_list->total;
     }
-    
-    
+
+
     snprintf(new_name, sizeof(new_name), "%s.%d", base_file, rotate_file_count_max - 1);
     remove(new_name);
 
-    for (int i = rotate_file_count_max - 1; i >= 0; i--) 
+    for (int i = rotate_file_count_max - 1; i >= 0; i--)
     {
-        if (i == 0) 
+        if (i == 0)
         {
             snprintf(old_name, sizeof(old_name), "%s", base_file);
-        } 
-        else 
+        }
+        else
         {
             snprintf(old_name, sizeof(old_name), "%s.%d", base_file, i - 1);
         }
@@ -225,7 +225,7 @@
 
     close(fd);
     int fd_new = open(base_file, O_CREAT | O_WRONLY | O_APPEND, 0600);
-    if (fd_new < 0) 
+    if (fd_new < 0)
     {
         fprintf(stderr, "failed to open %s: %s\n", base_file, strerror(errno));
         exit(-1);