linux-kernel - Re: [PATCH v2 1/2] gpiolib: irqchip: use different lockdep class for each gpio irqchip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 17 Aug 2015 15:33:04 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Grygorii Strashko <grygorii.strashko@...com>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	Linux-OMAP <linux-omap@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	Sekhar Nori <nsekhar@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Roger Quadros <rogerq@...com>
Subject: Re: [PATCH v2 1/2] gpiolib: irqchip: use different lockdep class for
 each gpio irqchip

On Mon, Aug 17, 2015 at 2:35 PM, Grygorii Strashko
<grygorii.strashko@...com> wrote:

> Since IRQ chip helpers were introduced drivers lose ability to
> register separate lockdep classes for each registered GPIO IRQ
> chip and the gpiolib now is using shared lockdep class for
> all GPIO IRQ chips (gpiochip_irq_lock_class).
> As result, lockdep will produce warning when there are min two
> stacked GPIO chips and all of them are interrupt controllers.
>
> HW configuration which generates lockdep warning (TI dra7-evm):
(...)
> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
> Cc: Roger Quadros <rogerq@...com>
> Reported-by: Roger Quadros <rogerq@...com>
> Tested-by: Roger Quadros <rogerq@...com>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
> Changes in v2:
> - removed accidental change in gpio chip structure description.

This v2 patch applied. I see no better alternative.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/