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

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Date:	Fri, 4 Dec 2015 10:54:13 +0000
From:	Sudeep Holla <sudeep.holla@....com>
To:	Grygorii Strashko <grygorii.strashko@...com>,
	Tony Lindgren <tony@...mide.com>
Cc:	Sudeep Holla <sudeep.holla@....com>,
	Linus Walleij <linus.walleij@...aro.org>,
	"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

Hi Grygorii,

On 04/12/15 10:44, Grygorii Strashko wrote:
> On 12/03/2015 11:37 PM, Tony Lindgren wrote:

[...]

>> And these both need to be applied together when we have a fix for the
>> above
>> as otherwise we'll get the lock recursion Sudeep mentioned in patch 2/2.
>>
>
> Most probably below diff will fix above issue:
>
> diff --git a/arch/arm/mach-omap2/prm_common.c
> b/arch/arm/mach-omap2/prm_common.c
> index 3fc2cbe..69cde67 100644
> --- a/arch/arm/mach-omap2/prm_common.c
> +++ b/arch/arm/mach-omap2/prm_common.c
> @@ -338,6 +338,7 @@ int omap_prcm_register_chain_handler(struct
> omap_prcm_irq_setup *irq_setup)
>                  ct->chip.irq_ack = irq_gc_ack_set_bit;
>                  ct->chip.irq_mask = irq_gc_mask_clr_bit;
>                  ct->chip.irq_unmask = irq_gc_mask_set_bit;
> +               ct->chip.flags = IRQCHIP_SKIP_SET_WAKE;

Thanks for testing. In that case without this hunk, we should get error
from pcs_irq_set_wake in the suspend path. No ? May be driver is not
checking the error value and entering suspend.

-- 
Regards,
Sudeep
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