linux-kernel - Re: [PATCH] watchdog: add Nano 7240 driver

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Message-ID: <20071024172731.202fb478@the-village.bc.nu>
Date:	Wed, 24 Oct 2007 17:27:31 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Wim Van Sebroeck <wim@...ana.be>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Gilles Gigan <gilles.gigan@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] watchdog: add Nano 7240 driver

On Wed, 24 Oct 2007 17:22:40 +0200
Wim Van Sebroeck <wim@...ana.be> wrote:

> Hi Andrew,
> 
> > > +	case WDIOC_SETOPTIONS:{
> > > +			int retval = -EINVAL;
> > > +
> > > +			if (arg & WDIOS_DISABLECARD) {
> > > +				wdt_disable();
> > > +				retval = 0;
> > > +			}
> > > +
> > > +			if (arg & WDIOS_ENABLECARD) {
> > > +				wdt_enable();
> > > +				retval = 0;
> > > +			}
> > > +
> > > +			return retval;
> > 
> > hrm.  So if userspace does ioctl(..., WDIOS_DISABLECARD|WDIOS_ENABLECARD,
> > that happens to be equivalent to WDIOS_ENABLECARD?
> > 
> > Do all watchdog drivers do it exactly the same way, or are we offering
> > inconsistent interfaces between different drivers?
> 
> I fear that all watchdog drivers do it more or less like this.

Not really an issue. "Mummy if I jump off a cliff it hurts"

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