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Date:	Tue, 19 Feb 2008 09:18:46 -0800
From:	"Kok, Auke" <auke-jan.h.kok@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Andrey Borzenkov <arvidjaar@...l.ru>,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [2.6.25-rc2] e100: Trying to free already-free IRQ 11 during
 suspend ...

Andrew Morton wrote:
> On Sun, 17 Feb 2008 15:36:50 +0300 Andrey Borzenkov <arvidjaar@...l.ru> wrote:
> 
>> ... and possibly reboot/poweroff (it flows by too fast to be legible).
>>
>> [ 8803.850634] ACPI: Preparing to enter system sleep state S3
>> [ 8803.853141] Suspending console(s)
>> [ 8805.287505] serial 00:09: disabled
>> [ 8805.291564] Trying to free already-free IRQ 11
>> [ 8805.291579] Pid: 6920, comm: pm-suspend Not tainted 2.6.25-rc2-1avb #2
>> [ 8805.291628]  [<c0152127>] free_irq+0xb7/0x130
>> [ 8805.291675]  [<c024bd80>] e100_suspend+0xc0/0x100
>> [ 8805.291724]  [<c01eaa36>] pci_device_suspend+0x26/0x70
>> [ 8805.291747]  [<c0243674>] suspend_device+0x94/0xd0
>> [ 8805.291763]  [<c02439a3>] device_suspend+0x153/0x240
>> [ 8805.291784]  [<c014314f>] suspend_devices_and_enter+0x4f/0xf0
>> [ 8805.291808]  [<c0143a5f>] ? freeze_processes+0x3f/0x80
>> [ 8805.291825]  [<c01432fa>] enter_state+0xaa/0x140
>> [ 8805.291840]  [<c014341f>] state_store+0x8f/0xd0
>> [ 8805.291852]  [<c0143390>] ? state_store+0x0/0xd0
>> [ 8805.291866]  [<c01d3404>] kobj_attr_store+0x24/0x30
>> [ 8805.291901]  [<c01b547b>] sysfs_write_file+0xbb/0x110
>> [ 8805.291936]  [<c0177d79>] vfs_write+0x99/0x130
>> [ 8805.291963]  [<c01b53c0>] ? sysfs_write_file+0x0/0x110
>> [ 8805.291979]  [<c01782fd>] sys_write+0x3d/0x70
>> [ 8805.291998]  [<c010409a>] sysenter_past_esp+0x5f/0xa5
>> [ 8805.292038]  =======================
>> [ 8805.347640] ACPI: PCI interrupt for device 0000:00:06.0 disabled
>> [ 8805.361128] ACPI: PCI interrupt for device 0000:00:02.0 disabled
>> [ 8805.376670]  hwsleep-0322 [00] enter_sleep_state     : Entering sleep state [S3]
>> [ 8805.376670] Back to C!
>>
>> Interface is unused normally (only for netconsole sometimes). dmesg and config
>> attached.
> 
> Does reverting this:
> 
> commit 8543da6672b0994921f014f2250e27ae81645580
> Author: Auke Kok <auke-jan.h.kok@...el.com>
> Date:   Wed Dec 12 16:30:42 2007 -0800
> 
>     e100: free IRQ to remove warningwhenrebooting
>     
> with this patch:
> 
> --- a/drivers/net/e100.c~revert-1
> +++ a/drivers/net/e100.c
> @@ -2804,9 +2804,8 @@ static int e100_suspend(struct pci_dev *
>  		pci_enable_wake(pdev, PCI_D3cold, 0);
>  	}
>  
> -	free_irq(pdev->irq, netdev);
> -
>  	pci_disable_device(pdev);
> +	free_irq(pdev->irq, netdev);
>  	pci_set_power_state(pdev, PCI_D3hot);
>  
>  	return 0;
> @@ -2848,8 +2847,6 @@ static void e100_shutdown(struct pci_dev
>  		pci_enable_wake(pdev, PCI_D3cold, 0);
>  	}
>  
> -	free_irq(pdev->irq, netdev);
> -
>  	pci_disable_device(pdev);
>  	pci_set_power_state(pdev, PCI_D3hot);
>  }
> _
> 
> fix it?
> 
>> Hmm ... after resume device has disappeared at all ...
>>
>> {pts/1}% cat /proc/interrupts
>>            CPU0
>>   0:    1290492    XT-PIC-XT        timer
>>   1:       6675    XT-PIC-XT        i8042
>>   2:          0    XT-PIC-XT        cascade
>>   3:          2    XT-PIC-XT
>>   4:          2    XT-PIC-XT
>>   5:          3    XT-PIC-XT
>>   7:          4    XT-PIC-XT        irda0
>>   8:          0    XT-PIC-XT        rtc0
>>   9:        583    XT-PIC-XT        acpi
>>  10:          2    XT-PIC-XT
>>  11:      31483    XT-PIC-XT        yenta, yenta, yenta, ohci_hcd:usb1, ALI 5451, pcmcia0.0
>>  12:      28070    XT-PIC-XT        i8042
>>  14:      21705    XT-PIC-XT        ide0
>>  15:      82123    XT-PIC-XT        ide1
>> NMI:          0   Non-maskable interrupts
>> TRM:          0   Thermal event interrupts
>> SPU:          0   Spurious interrupts
>> ERR:          0
> 
> I hope that's not a separate bug...

I'll take a look at this as well. thanks for reporting.

Auke
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