linux-kernel - Re: [PATCH 2/2] pinctrl: single: remove misuse of IRQF_NO

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20151204171050.GM23396@atomide.com>
Date:	Fri, 4 Dec 2015 09:10:50 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Sudeep Holla <sudeep.holla@....com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-omap@...r.kernel.org
Subject: Re: [PATCH 2/2] pinctrl: single: remove misuse of IRQF_NO_SUSPEND
 flag

* Sudeep Holla <sudeep.holla@....com> [151204 08:16]:
> Hi Tony,
> 
> On 04/12/15 15:40, Tony Lindgren wrote:
> >* Tony Lindgren <tony@...mide.com> [151203 13:41]:
> >>* Sudeep Holla <sudeep.holla@....com> [151203 11:00]:
> >>>
> >>>I have added irq_set_irq_wake(pcs_soc->irq, state) in pcs_irq_set_wake
> >>>which ensures it's marked for wakeup.
> >>
> >>Hmm well see the error I pasted in this thread, maybe that provides
> >>more clues.
> >
> >The irq_set_irq_wake(pcs_soc->irq, state) in pcs_irq_set_wake does not
> >look right to me as pcs_irq_set_wake toggles the irq_wake for each pin
> >separately, not for the whole controller.
> >
> 
> After thinking more about it we need some way to tell IRQ core that
> pcs_soc->irq is wakeup capable. Is that going to happen automatically
> via dev_pm_set_dedicated_wake_irq as you mentioned earlier ?
> 
> >I think all that can be left out with the snipped from Grygorii, and maybe
> >also the lock_class_key changes.
> >
> 
> If we not calling irq_set_irq_wake(pcs_soc->irq) in pcs_irq_set_wake, do
> you see possibility of lockdep recursion in any other paths.
> 
> Otherwise we don't need this if we remove irq_set_irq_wake(pcs_soc->irq)
> from pcs_irq_set_wake

I think Grygorii is right here and this is correct as it's a counter
once the other issues are sorted out and we have figured out what all
needs to be patched together.

Regards,

Tony
--
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/