dosfs: Write meta-data only if it changed

1 files changed, 10 insertions, 12 deletions

diff --git a/cpukit/libfs/src/dosfs/fat_file.c b/cpukit/libfs/src/dosfs/fat_file.c
index 1f20926884..af71ee239a 100644
--- a/cpukit/libfs/src/dosfs/fat_file.c
+++ b/cpukit/libfs/src/dosfs/fat_file.c
@@ -174,20 +174,17 @@ fat_file_update(fat_fs_info_t *fs_info, fat_file_fd_t *fat_fd)
      * if fat-file descriptor is not marked as "removed", synchronize
      * size, first cluster number, write time and date fields of the file
      */
-    if (!FAT_FILE_IS_REMOVED(fat_fd))
+    if (!FAT_FILE_IS_REMOVED(fat_fd) && FAT_FILE_HAS_META_DATA_CHANGED(fat_fd))
     {
         int rc;
 
-        if (fat_fd->fat_file_type == FAT_FILE)
-        {
-            rc = fat_file_write_first_cluster_num(fs_info, fat_fd);
-            if (rc != RC_OK)
-                ret_rc = rc;
+        rc = fat_file_write_first_cluster_num(fs_info, fat_fd);
+        if (rc != RC_OK)
+            ret_rc = rc;
 
-            rc = fat_file_write_file_size(fs_info, fat_fd);
-            if (rc != RC_OK)
-                ret_rc = rc;
-        }
+        rc = fat_file_write_file_size(fs_info, fat_fd);
+        if (rc != RC_OK)
+            ret_rc = rc;
 
         rc = fat_file_write_time_and_date(fs_info, fat_fd);
         if (rc != RC_OK)
@@ -677,8 +674,9 @@ fat_file_extend(
         /* add new chain to the end of existing */
         if ( fat_fd->fat_file_size == 0 )
         {
-            fat_fd->map.disk_cln = fat_fd->cln = chain;
+            fat_fd->map.disk_cln = chain;
             fat_fd->map.file_cln = 0;
+            fat_file_set_first_cluster_num(fat_fd, chain);
         }
         else
         {
@@ -721,7 +719,7 @@ fat_file_extend(
     }
 
     *a_length = new_length;
-    fat_fd->fat_file_size = new_length;
+    fat_file_set_file_size(fat_fd, new_length);
 
     return RC_OK;
 }