linux-kernel - Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout panic support

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Message-ID: <CADyBb7uUK-vTpm9gtxNqtbS6gxbpZdKNKspqzX8wGTNHbdH_HQ@mail.gmail.com>
Date:	Fri, 5 Feb 2016 17:20:29 +0800
From:	Fu Wei <fu.wei@...aro.org>
To:	Timur Tabi <timur@...eaurora.org>
Cc:	Mathieu Poirier <mathieu.poirier@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Paweł Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Wim Van Sebroeck <wim@...ana.be>,
	Guenter Roeck <linux@...ck-us.net>,
	Jon Corbet <corbet@....net>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-watchdog@...r.kernel.org, linux-doc@...r.kernel.org,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
	rruigrok@...eaurora.org, "Abdulhamid, Harb" <harba@...eaurora.org>,
	Christopher Covington <cov@...eaurora.org>,
	Dave Young <dyoung@...hat.com>,
	Pratyush Anand <panand@...hat.com>,
	G Gregory <graeme.gregory@...aro.org>,
	Al Stone <al.stone@...aro.org>,
	Hanjun Guo <hanjun.guo@...aro.org>,
	Jon Masters <jcm@...hat.com>, Arnd Bergmann <arnd@...db.de>,
	Leo Duran <leo.duran@....com>,
	Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout
 panic support

On 5 February 2016 at 00:43, Timur Tabi <timur@...eaurora.org> wrote:
> Mathieu Poirier wrote:
>>>
>>> >+#ifdef CONFIG_ARM_SBSA_WATCHDOG_PANIC
>>> >+       irq = platform_get_irq(pdev, 0);
>>> >+       if (irq < 0) {
>>> >+               dev_err(dev, "unable to get ws0 interrupt.\n");
>>> >+               return irq;
>>> >+       }
>>> >+#endif
>>> >+
>>
>> Can't the driver revert to single stage mode if platform_get_irq()
>> fails?  That way the value of 'irq' can be tested throughout the
>> _probe() function and the #ifdefs removed.
>
>
> I like that idea.  The same can be done with the devm_request_irq() call.
> It should definitely still display a warning if the command-line option is
> set but no interrupt is available.

Yes, I agree with that too, brilliant idea, this will be in v11 patchset



-- 
Best regards,

Fu Wei
Software Engineer
Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
Ph: +86 21 61221326(direct)
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