Re: Possible suspend/resume regression in .32-rc?

[Pavel Machek <pavel@ucw.cz>]

> >> > Given that it hangs very early, in arch_suspend_enable_irqs() (see my
> >> > other mail), I don't trust your analysis.
> >> >
> >> > I'm not using serial console on spitz, and I have never had successful
> >> > resume with the patch applied.
...
> I see. You can chech my patch in below. I need to save IPRs in suspend
> resume routine.
...
> >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>

Acked-by: Pavel Machek <pavel@ucw.cz>
Tested-by: Pavel Machek <pavel@ucw.cz>

> @@ -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)

Note: Your mail client is word-wrapping.

>  		saved_icmr[i] = _ICMR(irq);
>  		_ICMR(irq) = 0;
>  	}
> +	if (pxa_internal_irq_nr > 128)
> +		BUG();

BUG_ON()? WARN_ON() then irq_nr = 128? User is very unlikely to read
the BUG() message at this point...
									Pavel
-- 
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