linux-kernel - Re: [PATCH 10/12] mmc: sdhi: Fixup system PM suspend lock-up

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Message-ID: <CAMuHMdW-+xGKmcDSNjzS6MBB9ZnQ1FVrCeM82kyr5SgO-nPr0Q@mail.gmail.com>
Date:	Tue, 26 Aug 2014 09:43:39 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	Linux MMC List <linux-mmc@...r.kernel.org>,
	Ian Molton <ian.molton@...ethink.co.uk>,
	Chris Ball <chris@...ntf.net>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/12] mmc: sdhi: Fixup system PM suspend lock-up

On Mon, Aug 25, 2014 at 2:26 PM, Ulf Hansson <ulf.hansson@...aro.org> wrote:
> At system PM suspend, the tmio core accessed the internal registers of
> the controller without first moving the device into active state. This
> caused a lock-up in system PM suspend phase.
>
> The reason for the register access were masking of IRQs. Since that is
> managed via the runtime PM suspend path, let's just re-use that path
> for system PM suspend.
>
> In other words force the device into runtime PM suspend state at system
> PM suspend and restore it to active state at system PM resume.
>
> Reported-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>

Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>

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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