extmod/vfs_fat_file: Allow file obj to respond to ioctl flush request.

extmod/vfs_fat_file.c

@@ -108,15 +108,6 @@ STATIC mp_uint_t file_obj_write(mp_obj_t self_in, const void *buf, mp_uint_t siz
     return sz_out;
 }
 
-STATIC mp_obj_t file_obj_flush(mp_obj_t self_in) {
-    pyb_file_obj_t *self = MP_OBJ_TO_PTR(self_in);
-    FRESULT res = f_sync(&self->fp);
-    if (res != FR_OK) {
-        mp_raise_OSError(fresult_to_errno_table[res]);
-    }
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_1(file_obj_flush_obj, file_obj_flush);
 
 STATIC mp_obj_t file_obj_close(mp_obj_t self_in) {
     pyb_file_obj_t *self = MP_OBJ_TO_PTR(self_in);
@@ -164,6 +155,14 @@ STATIC mp_uint_t file_obj_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg,
         s->offset = f_tell(&self->fp);
         return 0;
 
+    } else if (request == MP_STREAM_FLUSH) {
+        FRESULT res = f_sync(&self->fp);
+        if (res != FR_OK) {
+            *errcode = fresult_to_errno_table[res];
+            return MP_STREAM_ERROR;
+        }
+        return 0;
+
     } else {
         *errcode = MP_EINVAL;
         return MP_STREAM_ERROR;
@@ -243,7 +242,7 @@ STATIC const mp_rom_map_elem_t rawfile_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
     { MP_ROM_QSTR(MP_QSTR_readlines), MP_ROM_PTR(&mp_stream_unbuffered_readlines_obj) },
     { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
-    { MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&file_obj_flush_obj) },
+    { MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&mp_stream_flush_obj) },
     { MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&file_obj_close_obj) },
     { MP_ROM_QSTR(MP_QSTR_seek), MP_ROM_PTR(&mp_stream_seek_obj) },
     { MP_ROM_QSTR(MP_QSTR_tell), MP_ROM_PTR(&mp_stream_tell_obj) },