46   a->fd = -1;  in rt_thread_smart_dm_init()
52   if (a->fd >= 0)  in rt_thread_smart_dm_cleanup()
54       close(a->fd);  in rt_thread_smart_dm_cleanup()
55       a->fd = -1;  in rt_thread_smart_dm_cleanup()
146       if (a->fd >= 0)  in rt_thread_smart_dm_setup()
147         close(a->fd);  in rt_thread_smart_dm_setup()
154       a->fd = open(buf, a->fd_rw ? O_RDWR : O_RDONLY);  in rt_thread_smart_dm_setup()
155       if (a->fd < 0)  in rt_thread_smart_dm_setup()
159   return a->fd;  in rt_thread_smart_dm_setup()
165   int fd = rt_thread_smart_dm_setup(d, 0);  in rt_thread_smart_dm_read()  local
168   if (fd < 0)  in rt_thread_smart_dm_read()
170   res = pread(fd, buf, len, pos);  in rt_thread_smart_dm_read()
184   int fd = rt_thread_smart_dm_setup(d, 1);  in rt_thread_smart_dm_write()  local
187   if (fd < 0)  in rt_thread_smart_dm_write()
189   res = pwrite(fd, buf, len, pos);  in rt_thread_smart_dm_write()