diff --git a/components/dfs/filesystems/nfs/dfs_nfs.c b/components/dfs/filesystems/nfs/dfs_nfs.c
index 5d7aa0db61008a3b8daa5014107897fe14763c7d..13242100074ace0422a5c336fb47caafe9e78be6 100644
--- a/components/dfs/filesystems/nfs/dfs_nfs.c
+++ b/components/dfs/filesystems/nfs/dfs_nfs.c
@@ -578,7 +578,8 @@ int nfs_read(struct dfs_fd *file, void *buf, size_t count)
 
 
     RT_ASSERT(file->data != NULL);
-    nfs = (nfs_filesystem *)((struct dfs_filesystem*)(file->data));
+    struct dfs_filesystem *dfs_nfs  = ((struct dfs_filesystem*)(file->data));
+    nfs = (struct nfs_filesystem *)(dfs_nfs->data); 
     fd = (nfs_file *)(nfs->data);
     RT_ASSERT(fd != NULL);
 
@@ -644,7 +645,8 @@ int nfs_write(struct dfs_fd *file, const void *buf, size_t count)
         return -EISDIR;
 
     RT_ASSERT(file->data != NULL);
-    nfs = (nfs_filesystem *)((struct dfs_filesystem*)(file->data));
+    struct dfs_filesystem *dfs_nfs  = ((struct dfs_filesystem*)(file->data));
+    nfs = (struct nfs_filesystem *)(dfs_nfs->data); 
     fd = (nfs_file *)(nfs->data);
     RT_ASSERT(fd != NULL);
 
@@ -684,8 +686,8 @@ int nfs_write(struct dfs_fd *file, const void *buf, size_t count)
             /* update current position */
             file->pos = fd->offset;
             /* update file size */
-			if (fd->size < fd->offset) fd->size = fd->offset;
-			file->size = fd->size;
+            if (fd->size < fd->offset) fd->size = fd->offset;
+            file->size = fd->size;
         }
         xdr_free((xdrproc_t)xdr_WRITE3res, (char *)&res);
     } while (count > 0);
@@ -704,7 +706,8 @@ int nfs_lseek(struct dfs_fd *file, off_t offset)
         return -EISDIR;
 
     RT_ASSERT(file->data != NULL);
-    nfs = (nfs_filesystem *)((struct dfs_filesystem*)(file->data));
+    struct dfs_filesystem *dfs_nfs  = ((struct dfs_filesystem*)(file->data));
+    nfs = (struct nfs_filesystem *)(dfs_nfs->data); 
     fd = (nfs_file *)(nfs->data);
     RT_ASSERT(fd != NULL);
 
@@ -722,7 +725,8 @@ int nfs_close(struct dfs_fd *file)
 {
     nfs_filesystem *nfs;
     RT_ASSERT(file->data != NULL);
-    nfs = (nfs_filesystem *)((struct dfs_filesystem*)(file->data));
+    struct dfs_filesystem *dfs_nfs  = ((struct dfs_filesystem*)(file->data));
+    nfs = (struct nfs_filesystem *)(dfs_nfs->data); 
 
     if (file->type == FT_DIRECTORY)
     {
@@ -751,7 +755,8 @@ int nfs_open(struct dfs_fd *file)
 {
     nfs_filesystem *nfs;
     RT_ASSERT(file->data != NULL);
-    nfs = (nfs_filesystem *)((struct dfs_filesystem*)(file->data));
+    struct dfs_filesystem *dfs_nfs  = ((struct dfs_filesystem*)(file->data));
+    nfs = (struct nfs_filesystem *)(dfs_nfs->data); 
 
 
     if (file->flags & O_DIRECTORY)
@@ -883,7 +888,6 @@ nfs_dir *nfs_opendir(nfs_filesystem *nfs, const char *path)
     if (handle == NULL)
     {
         rt_free(dir);
-		
         return NULL;
     }
 
@@ -1093,7 +1097,8 @@ int nfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
 
 
     RT_ASSERT(file->data != NULL);
-    nfs = (nfs_filesystem *)((struct dfs_filesystem*)(file->data));
+    struct dfs_filesystem *dfs_nfs  = ((struct dfs_filesystem*)(file->data));
+    nfs = (struct nfs_filesystem *)(dfs_nfs->data); 
     dir = (nfs_dir *)(nfs->data);
     RT_ASSERT(dir != NULL);