return true;
 }
 
-static inline u16 norm_ctrl_async_buffer_size(u16 buf_size)
+u16 dim_norm_ctrl_async_buffer_size(u16 buf_size)
 {
        u16 const max_size = (u16)ADT1_CTRL_ASYNC_BD_MASK + 1u;
 
                return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE, "Bad buffer size");
 
        if (ch->packet_length == 0 && ch->bytes_per_frame == 0 &&
-           buf_size != norm_ctrl_async_buffer_size(buf_size))
+           buf_size != dim_norm_ctrl_async_buffer_size(buf_size))
                return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE,
                                    "Bad control/async buffer size");
 
        dimcb_io_write(&g.dim2->MS1, 0);
 }
 
-u16 dim_norm_ctrl_async_buffer_size(u16 buf_size)
-{
-       return norm_ctrl_async_buffer_size(buf_size);
-}
-
 /**
  * Retrieves maximal possible correct buffer size for isochronous data type
  * conform to given packet length and not bigger than given buffer size.