linux-kernel - Re: [PATCH] PM / Domains: restore calling of .suspend/resume

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Date:	Thu, 13 Nov 2014 20:11:17 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Grygorii Strashko <grygorii.strashko@...com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Kevin Hilman <khilman@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Krzysztof Kozłowski <k.kozlowski@...sung.com>
Subject: Re: [PATCH] PM / Domains: restore calling of .suspend/resume_noirq() callbacks

On Thu, Nov 13, 2014 at 7:43 PM, Grygorii Strashko
<grygorii.strashko@...com> wrote:
> On 11/13/2014 03:33 AM, Rafael J. Wysocki wrote:
>> On Wednesday, November 12, 2014 06:00:47 PM Grygorii Strashko wrote:
>>> Now .suspend/resume_noirq() callbacks will not be called during
>>> system wide suspend/resume for devices which belongs to some GPD.
>>> It seems, that this change was accidentally introduced by
>>> commit d23b9b00cdde ("PM / Domains: Rework system suspend callback
>>>   routines (v2)").
>>
>> I'm not sure if that was really accidentally.
>>
>> Can you describe the problem that the change below is attempting to
>> address, without going to much into the history?  IOW, what's that
>> doesn't work right now?
>
> There are no real issues - now in Kernel there are no users of GPD
> which use "noirq" callbacks.

Indeed.

But as the .suspend_noirq() and .resume_noirq() callbacks are not called
when using the generic PM domain, I had to manually handle interrupt
disable/enable in commit a00d91ea264f974b ("fbdev: sh_mobile_hdmi:
Re-init regs before irq re-enable on resume").

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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