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SubjectRe: Possible suspend/resume regression in .32-rc?
On Mon, Nov 02, 2009 at 07:18:02AM -0400, Haojian Zhuang wrote:
> On Mon, Nov 2, 2009 at 6:51 AM, Pavel Machek <pavel@ucw.cz> wrote:
> >>
> >> It seems that we're talking on different issue with similar symptom.
> >> Please check my test method. While I'm testing suspend with devices
> >> level, kernel is blocked in console resume. In this level, it won't
> >> call arch_suspend_enable_irqs(). This function call is only invoked in
> >> processor level or below.
> >
> > For me, everything but real suspend works. I do _not_ have serial
> > console for spitz.
> >
> >> Up to now, I can't reproduce the issue you're talking on my platform
> >> yet. I'll check this issue continuously. I also want to know your
> >> hardware information.
> >
> > Spitz, aka Sharp Zaurus c3000.
> >
>
> I see. You can chech my patch in below. I need to save IPRs in suspend
> resume routine.

Yep - that fixes it on my platform. Great. Add my 'Tested-by' if you
like.

Thanks,
Daniel

> From 1764e836424d42a0654b8b73c402a2dddb118dc4 Mon Sep 17 00:00:00 2001
> From: Haojian Zhuang <haojian.zhuang@marvell.com>
> Date: Mon, 2 Nov 2009 14:02:21 -0500
> Subject: [PATCH] pxa: fix system resume issue on pxa27x and pxa3xx
>
> Since interrupt handler is changed to use interrupt priority, we also need to
> save and restore these interrupt controller registers in suspend/resume
> routine.
>
> Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
> ---
> arch/arm/mach-pxa/irq.c | 7 +++++++
> 1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
> index d694ce2..cdc272b 100644
> --- a/arch/arm/mach-pxa/irq.c
> +++ b/arch/arm/mach-pxa/irq.c
> @@ -150,6 +150,7 @@ void __init pxa_init_irq(int irq_nr, set_wake_t fn)
>
> #ifdef CONFIG_PM
> static unsigned long saved_icmr[2];
> +static unsigned long saved_ipr[128];
>
> static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
> {
> @@ -159,6 +160,10 @@ static int pxa_irq_suspend(struct sys_device
> *dev, pm_message_t state)
> saved_icmr[i] = _ICMR(irq);
> _ICMR(irq) = 0;
> }
> + if (pxa_internal_irq_nr > 128)
> + BUG();
> + for (i = 0; i < pxa_internal_irq_nr; i++)
> + saved_ipr[i] = IPR(i);
>
> return 0;
> }
> @@ -171,6 +176,8 @@ static int pxa_irq_resume(struct sys_device *dev)
> _ICMR(irq) = saved_icmr[i];
> _ICLR(irq) = 0;
> }
> + for (i = 0; i < pxa_internal_irq_nr; i++)
> + IPR(i) = saved_ipr[i];
>
> ICCR = 1;
> return 0;
> --
> 1.5.6.5


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