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Date:   Wed, 20 Nov 2019 10:30:54 +0000
From:   Russell King - ARM Linux admin <linux@armlinux.org.uk>
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Guenter Roeck <linux@roeck-us.net>,
        Laura Abbott <labbott@redhat.com>,
        Wim Van Sebroeck <wim@linux-watchdog.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        LINUXWATCHDOG <linux-watchdog@vger.kernel.org>,
        Lennert Buytenhek <kernel@wantstofly.org>
Subject: Re: [PATCH] watchdog: Remove iop_wdt
Message-ID: <20191120103054.GM25745@shell.armlinux.org.uk>
References: <20191118220432.1611-1-labbott@redhat.com>
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 <4f283ab6-0f3c-60e9-cfd1-29d10d978986@roeck-us.net>
 <20191120100341.GK25745@shell.armlinux.org.uk>
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On Wed, Nov 20, 2019 at 11:15:01AM +0100, Arnd Bergmann wrote:
> On Wed, Nov 20, 2019 at 11:03 AM Russell King - ARM Linux admin
> <linux@armlinux.org.uk> wrote:
> > On Tue, Nov 19, 2019 at 06:29:09AM -0800, Guenter Roeck wrote:
> > > On 11/19/19 1:40 AM, Arnd Bergmann wrote:
> > > > On Tue, Nov 19, 2019 at 3:08 AM Guenter Roeck <linux@roeck-us.net> wrote:
> > > > > On 11/18/19 2:04 PM, Laura Abbott wrote:
> > >
> > > Good point, especially since apparently no one cared for five years.
> >
> > Doesn't mean that there aren't interested parties.  I still have
> > IOP32x hardware running here in the form of a N2100 (my firewall)
> > and it seems that I never noticed this option disappearing until
> > now...
> 
> It's not that it was ever there for IOP32x: the driver was introduced in 2007
> and was available for IOP32x but failed to compile for it until 2014 when
> I sent the patch to disable the driver in all configurations that
> failed to build.

Well:

systems/n2100/boot/config-3.11.5+:CONFIG_IOP_WATCHDOG=m
systems/n2100/boot/config-3.12.6+:CONFIG_IOP_WATCHDOG=m
systems/n2100/boot/config-3.9.5+:CONFIG_IOP_WATCHDOG=m

-rw-rw-r-- 1 rmk rmk 5284 Dec 30  2013 systems/n2100/lib/modules/3.12.6+/kernel/drivers/watchdog/iop_wdt.ko
-rw-rw-r-- 1 rmk rmk 5276 Dec 20  2013 systems/n2100/lib/modules/3.9.5+/kernel/drivers/watchdog/iop_wdt.ko

It seems I've been carrying a patch to comment out the troublesome code:

-       write_wdtsr(IOP13XX_WDTCR_IB_RESET);
+//     write_wdtsr(IOP13XX_WDTCR_IB_RESET);

in my stable tree since 2015.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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