linux-kernel - Re: [PATCH V2 1/6] mfd: tps6586x:use devm managed resources

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Message-ID: <50064AA7.3020508@nvidia.com>
Date:	Wed, 18 Jul 2012 11:03:27 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"linus.walleij@...ricsson.com" <linus.walleij@...ricsson.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Stephen Warren <swarren@...dia.com>
Subject: Re: [PATCH V2 1/6] mfd: tps6586x:use devm managed resources

On Tuesday 17 July 2012 10:23 PM, Mark Brown wrote:
> * PGP Signed by an unknown key
>
> On Tue, Jul 17, 2012 at 10:12:39AM +0530, Laxman Dewangan wrote:
>> On Tuesday 17 July 2012 01:31 AM, Mark Brown wrote:
>>> On Mon, Jul 16, 2012 at 12:21:45PM +0530, Laxman Dewangan wrote:
>
>> I think device_remove will get called before the managed resource
>> get freed.
>> So do we need to call disable_irq() in remove() to avoid any interrupts?
> That would be very rude if the IRQ happened to get shared, though that's
> not possible at the moment.  In general it's pretty hard to use devm_
> IRQs safely, it's normally safest to avoid them due to the issues with
> ensuring that the interrupt handler is safe to be called even while the
> device is being torn down.

OK, then I will revert this specific change if it is not safe. I will 
send the another patch (part of series v3 1/6) for this change only.
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