4 files changed, 9 insertions, 13 deletions
diff --git a/components/dfs/Kconfig b/components/dfs/Kconfig
index 39eca3c507..442c3bb260 100644
--- a/components/dfs/Kconfig
+++ b/components/dfs/Kconfig
@@ -14,13 +14,11 @@ if RT_USING_DFS
 
     config DFS_FILESYSTEMS_MAX
         int "The maximal number of mounted file system"
-        default 4 if RT_USING_DFS_NFS
-        default 2
+        default 4
 
     config DFS_FILESYSTEM_TYPES_MAX
         int "The maximal number of file system type"
-        default 4 if RT_USING_DFS_NFS
-        default 2
+        default 4
 
     config DFS_FD_MAX
         int "The maximal number of opened files"
diff --git a/components/dfs/filesystems/devfs/devfs.c b/components/dfs/filesystems/devfs/devfs.c
index 2e2248d5cc..d615482452 100644
--- a/components/dfs/filesystems/devfs/devfs.c
+++ b/components/dfs/filesystems/devfs/devfs.c
@@ -313,15 +313,13 @@ static const struct dfs_filesystem_ops _device_fs =
     "devfs",
     DFS_FS_FLAG_DEFAULT,
     &_device_fops,
-
     dfs_device_fs_mount,
-    RT_NULL,
-    RT_NULL,
-    RT_NULL,
-
-    RT_NULL,
+    RT_NULL, /*unmount*/
+    RT_NULL, /*mkfs*/
+    RT_NULL, /*statfs*/
+    RT_NULL, /*unlink*/
     dfs_device_fs_stat,
-    RT_NULL,
+    RT_NULL, /*rename*/
 };
 
 int devfs_init(void)
diff --git a/components/dfs/include/dfs_fs.h b/components/dfs/include/dfs_fs.h
index 828f15a0f5..3d194515df 100644
--- a/components/dfs/include/dfs_fs.h
+++ b/components/dfs/include/dfs_fs.h
@@ -15,7 +15,7 @@
 #ifdef RT_USING_LIBC
 #include <sys/types.h>
 #endif
-
+#include <sys/errno.h>
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/components/dfs/src/dfs_file.c b/components/dfs/src/dfs_file.c
index 802311b54e..fa0f6000b4 100644
--- a/components/dfs/src/dfs_file.c
+++ b/components/dfs/src/dfs_file.c
@@ -157,7 +157,7 @@ int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args)
         return -EINVAL;
 
     /* regular file system fd */
-    if (fd->type == FT_REGULAR || fd->type == FT_DEVICE)
+    if (fd->type == FT_REGULAR)
     {
         switch (cmd)
         {