Re: [PATCH] drivers/char/moxa.c, kernel 2.6.23.14

From: Jiri Slaby
Date: Wed Jan 23 2008 - 10:37:51 EST


On 01/22/2008 11:23 AM, Oyvind Aabling wrote:
On Mon, 21 Jan 2008, Jiri Slaby wrote:
Would you be willing to test such a patch for point no. 3?

Yes, I could do that.

I can see your point about the non-portability of it, but
how about this scenario, to provide backwards compatibility:

* We keep the (ugly and non-compatible) MOXA_GET_CONF
ioctl, to avoid breaking the old moxaload.
Let's rename it to MOXA_GET_CONF_OLD or MOXA_GET_CONF_BAD in the driver.
* Create a new MOXA_GET_CONF ioctl (with a new
number, of course), that does it "the right way".
If you don't like renaming ioctl's, we need a new name for this one.
* Rewrite moxaload to either do a kernel version check
and use the new ioctl if available or the old if not.
Or skip that and let it call the new ioctl first.
If it succeeds (system running a newer kernel): fine, and
if not (system running an older kernel), use the old ioctl.

The MOXA Intellio driver and moxaload have been "broken" ever since they
were written in 1999, and this way, we don't break anything - you can
use old or new kernel, and old or new moxaload in any combination.

Whaddaya think ?

We won't need anything from that. I'm almost done with firmware support. The only thing you'll need to do is to copy the .cod file(s) into /lib/firmware or wherever your firmware loader (probably udev nowadays) finds such files.

Could you post me lspci -vvxxx output of your moxa card?

thanks,
--js
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