Re: [PATCH] Watchdog: Winsystems EPX-C3 SBC

[Willy Tarreau <willy@w.ods.org>]

On Sat, Jan 14, 2006 at 07:24:09PM +0000, Alan Cox wrote:
> Some quick comments:
> 
> +       if (len) {
> +               epx_c3_pet();
> +       }
> 
> Doesn't need brackets (minor style)
> 
> Otherwise it looks excellent but should use request_region and friends
> to claim the two ports it uses.

You just remind me that I had to comment out the request_region in another
watchdog driver I wrote, because the hardware was mapped on I/O port 0xF2
which is within the FPU I/O space :

   00f0-00ff : fpu

I did not know how to correctly fix this problem, and I could live without
the check, but I found it dirty and never proposed it for inclusion.

It's not the first time I notice that write-only hardware share a reserved
I/O range with other components, and I don't know how to cope with this.
Perhaps it sounds logical not to request_region() as the hardware is meant
to be 100% transparent afterall ?

> The see the "Sign your work:" bit of Documentation/SubmittingPatches are
> it looks ready to go in.
> 
> Alan

Willy