[PATCH 0/6] staging: comedi: usbduxsigma: fix some problems in command handling

[Ian Abbott]

Fix some minor problems in the testing of asynchronous commands for the AI
and AO subdevices and remove some redundant code.

The main problem is that the testing of a new command can affect the
operation of an already running command, which it isn't supposed to do.  (In
practice, applications don't tend to test new commands while a command is
running on the same subdevice, so the bug can be classed as minor.)  This is
corrected by the patches 1 and 2, for the AI and AO subdevices,
respectively.

1) staging: comedi: usbduxsigma: don't clobber ai_timer in command test
2) staging: comedi: usbduxsigma: don't clobber ao_timer in command test
3) staging: comedi: usbduxsigma: remove AI scan_begin_src == TRIG_FOLLOW
4) staging: comedi: usbduxsigma: round down AI scan_begin_arg at step 4.
5) staging: comedi: usbduxsigma: remove unused "convert" timing for AO
6) staging: comedi: usbduxsigma: round down AO scan_begin_arg at step 4.

 drivers/staging/comedi/drivers/usbduxsigma.c | 139 +++++++++++----------------
 1 file changed, 54 insertions(+), 85 deletions(-)