linux-kernel - Re: [PATCH v2 4/4] watchdog: aspeed: Move init to arch

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Message-ID: <CACPK8Xdz1iK-4bqZfmfTUYw3zDLxCniwt6LupJq5mo-CCca3XQ@mail.gmail.com>
Date:   Wed, 20 Sep 2017 15:43:41 +0930
From:   Joel Stanley <joel@....id.au>
To:     Andrew Jeffery <andrew@...id.au>
Cc:     linux-watchdog@...r.kernel.org, Wim Van Sebroeck <wim@...ana.be>,
        Guenter Roeck <linux@...ck-us.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        linux-aspeed@...ts.ozlabs.org, Ryan Chen <ryan_chen@...eedtech.com>
Subject: Re: [PATCH v2 4/4] watchdog: aspeed: Move init to arch_initcall

On Wed, Sep 20, 2017 at 3:00 PM, Andrew Jeffery <andrew@...id.au> wrote:
> Probing at device_initcall time lead to perverse cases where the
> watchdog was probed after, say, I2C devices, which then leaves a
> potentially running watchdog at the mercy of I2C device behaviour and
> bus conditions.
>
> Load the watchdog driver early to ensure that the kernel is patting it
> well before initialising peripherals.
>
> Signed-off-by: Andrew Jeffery <andrew@...id.au>

I agree that we need to make sure the watchdog driver is loaded
earlier. I think this is the correct method, but I'll defer to Guenter
on this one.

Cheers,

Joel