linux-kernel - Re: AT91SAM9/CAP9 watchdog driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080604201825.2decc66e@core>
Date:	Wed, 4 Jun 2008 20:18:25 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Andrew Victor" <avictor.za@...il.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>, wim@...ana.be,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	linux-kernel@...r.kernel.org
Subject: Re: AT91SAM9/CAP9 watchdog driver

> > - If you specify a bogus value it doesn't load
> > - If you specify no value you get a valid default
> > - If you specify a valid value you get that
> >
> > I don't believe yours should be different.
> 
> I don't think any other in-kernel watchdog driver has to deal with
> write-once hardware.  On these processors once the watchdog register

That would not be the case.

> is programmed, it cannot be disabled or re-programmed.
> If the above behaviour is required, then we might aswell remove the
> ioctl(WDIOC_SETTIMEOUT) interface for this driver since if the user
> wants anything other than the default timeout they would need to pass
> it via the kernel command-line or module parameters.

Actually quit a few of them deal with various hardware limits by using a
software timer to maintain the hardware timer poking.

Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/