diff options
| -rw-r--r-- | drivers/staging/comedi/comedi_fops.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index e625ef2bcb7f..b7c9270f9e92 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -1155,6 +1155,8 @@ static int do_bufinfo_ioctl(struct comedi_device *dev, bi.bytes_written = 0; } else { /* command was set up in "write" direction */ + if (!comedi_is_subdevice_running(s)) + bi.bytes_written = 0; if (bi.bytes_written) { comedi_buf_write_alloc(s, bi.bytes_written); bi.bytes_written = |