linux-kernel - Re: [PATCH 1/2] gpio: tegra: create irq mapping in gpio_to

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Date:	Thu, 8 Nov 2012 09:59:02 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	Stephen Warren <swarren@...dia.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH 1/2] gpio: tegra: create irq mapping in gpio_to_irq

On Wednesday 07 November 2012 10:38 PM, Stephen Warren wrote:
> On 11/07/2012 08:01 AM, Laxman Dewangan wrote:
>> The gpio interrupts get mapped linearly and hence the mapping
>> of irq need to be created by irq_create_mapping().
>>
>> The function gpio_to_irq() returns the irq by irq_find_mapping()
>> and so returns 0 as there is no mapping created. Fix the function
>> to create mapping when gpio_to_irq() get called.
> I'm not convinced this should be needed. tegra_gpio_probe() contains:


Oh, yes, I did not observe this code in my review. So this change is not 
resolving any issue.


I think we should move the mapping to gpio_to_irq() rather than doing 
this in probe.

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