On 27/08/14 19:04, Hartley Sweeten wrote:
On Wednesday, August 27, 2014 11:00 AM, Ian Abbott wrote:
On 26/08/14 00:04, H Hartley Sweeten wrote:
The comedi core does the sanity checking of the comedi_insn before
calling the (*insn_write). Remove the unnecessary checks.

Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
   drivers/staging/comedi/drivers/me4000.c | 33 
++-------------------------------
   1 file changed, 2 insertions(+), 31 deletions(-)

[snip]

I thought you might have updated this function to handle the insn->n > 1
case as well.  Maybe in a follow-up patch?

There are a couple that have the insn->n > 1 issue. For some of them I have
not located a datasheet/user manual to verify the proper way to handle
multiple writes to the DAC. I will fix those in follow-up patches.

Regards,
Hartley


In such cases, it's probably better just to write the last data value, rather than the first.

--
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbo...@mev.co.uk>        )=-
-=( Tel: +44 (0)161 477 1898   FAX: +44 (0)161 718 3587         )=-
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