linux-kernel - Re: [PATCH] gpiolib: Fix locking on gpio debugfs files

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Date:	Mon, 11 Feb 2013 15:31:45 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	linux-kernel@...r.kernel.org,
	Alexandre Courbot <acourbot@...dia.com>
Subject: Re: [PATCH] gpiolib: Fix locking on gpio debugfs files

On Sat, Feb 9, 2013 at 11:34 AM, Grant Likely <grant.likely@...retlab.ca> wrote:

> The debugfs files really need to hold the gpiolib spinlock before
> accessing the list. Otherwise chip addition/removal will cause an oops.
>
> Cc: Alexandre Courbot <acourbot@...dia.com>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Grant Likely <grant.likely@...retlab.ca>

Acked-by: Linus Walleij <linus.walleij@...aro.org>

> I've also got a draft patch that turns gpio chips into first-class
> kobjects which means we can do proper reference counting on them and
> prevent the structure from actually disappearing while other drivers
> still hold references.

Thank you for doing this!

Yours,
Linus Walleij
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