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Subject[regression] Ideapad S10-3 does not wake up from suspend (Re: [PATCH v2 2/2] x86: don't unmask disabled irqs when migrating them)
Hi,

Lars Boegild Thomsen writes[1]:

> After update from 2.6 kernel to 3.0 my Idepad S10-3 will not wake up after
> sleep. Back to latest 2.6 kernel works fine.
[...]
> Upon wakeup, the power light go from slow flashing to on, the battery light
> goes from off to on, the hdd light blink once and then everything is dead.
> Nothing happens on the screen, all keys dead. The fan/hdd switch on
> physically (very hard to hear on this model or I am getting deaf).
> Ctrl+alt+del or the alt+sysreq is non-responsive. The only LED that show
> keyboard status is CAPS lock and that is unresponsive too. Only way I have
> found to get it rebooted is holding down the power button a few secs until it
> switch physically off and then switch it on again.
[...]
> Here's the result of the final bisect:
>
> 983bbf1af0664b78689612b247acb514300f62c7 is the first bad commit
[...]
> I also tried to go back to HEAD and manually change arch/x86/irq.c revert this
> particular commit and it works.

For reference:

> commit 983bbf1af0664b78689612b247acb514300f62c7
> Author: Tian, Kevin <kevin.tian@intel.com>
> Date: Fri May 6 14:43:56 2011 +0800
>
> x86: Don't unmask disabled irqs when migrating them
>
> It doesn't make sense to unconditionally unmask a disabled irq when
> migrating it from offlined cpu to another. If the irq triggers then it
> will be disabled in the interrupt handler anyway. So we can just avoid
> unmasking it.
>
> [ tglx: Made masking unconditional again and fixed the changelog ]
>
> Signed-off-by: Fengzhe Zhang <fengzhe.zhang@intel.com>
> Signed-off-by: Kevin Tian <kevin.tian@intel.com>
> Cc: Ian Campbell <Ian.Campbell@citrix.com>
> Cc: Jan Beulich <JBeulich@novell.com>
> Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
> Link: http://lkml.kernel.org/r/%3C625BA99ED14B2D499DC4E29D8138F1505C8ED7F7E3%40shsmsx502.ccr.corp.intel.com%3
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
>
> diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
> index 544efe2741be..6c0802eb2f7f 100644
> --- a/arch/x86/kernel/irq.c
> +++ b/arch/x86/kernel/irq.c
> @@ -276,7 +276,8 @@ void fixup_irqs(void)
> else if (!(warned++))
> set_affinity = 0;
>
> - if (!irqd_can_move_in_process_context(data) && chip->irq_unmask)
> + if (!irqd_can_move_in_process_context(data) &&
> + !irqd_irq_disabled(data) && chip->irq_unmask)
> chip->irq_unmask(data);
>
> raw_spin_unlock(&desc->lock);

Known problem? Ideas?

Regards,
Jonathan

[1] http://bugs.debian.org/635575


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