RE: [E1000-devel] [PATCH] e100: free IRQ to remove warning whenrebooting

["Brandeburg, Jesse" <jesse.brandeburg@intel.com>]

<forwarding whole message for netdev to review>

Ian Wienand wrote:
> Hi,
> 
> When rebooting today I got
> 
> Will now restart.
> ACPI: PCI interrupt for device 0000:00:03.0 disabled
> GSI 20 (level, low) -> CPU 1 (0x0100) vector 53 unregistered
> Destroying IRQ53 without calling free_irq
> WARNING: at
> /home/insecure/ianw/programs/git-kernel/linux-2.6/kernel/irq/chip.c:76
> dynamic_irq_cleanup()  
> 
> Call Trace:
>  [<a000000100014340>] show_stack+0x40/0xa0
>                                 sp=e00000407c927b40
>  bsp=e00000407c920eb8 [<a0000001000143d0>] dump_stack+0x30/0x60
>                                 sp=e00000407c927d10
>  bsp=e00000407c920ea0 [<a0000001000e58e0>]
>                                 dynamic_irq_cleanup+0x160/0x1e0
>  sp=e00000407c927d10 bsp=e00000407c920e70 [<a0000001000106b0>]
>                                 destroy_and_reserve_irq+0x30/0xc0
>  sp=e00000407c927d10 bsp=e00000407c920e40 [<a0000001000508f0>]
>                                 iosapic_unregister_intr+0x5b0/0x5e0
>  sp=e00000407c927d10 bsp=e00000407c920dd8 [<a00000010000aa70>]
>                                 acpi_unregister_gsi+0x30/0x60
>  sp=e00000407c927d10 bsp=e00000407c920db8 [<a00000010042e300>]
>                                 acpi_pci_irq_disable+0x140/0x160
>  sp=e00000407c927d10 bsp=e00000407c920d88 [<a000000100774200>]
>                                 pcibios_disable_device+0xa0/0xc0
>  sp=e00000407c927d20 bsp=e00000407c920d68 [<a0000001003778d0>]
>                                 pci_disable_device+0x130/0x160
>  sp=e00000407c927d20 bsp=e00000407c920d38 [<a000000100525d20>]
>                                 e100_shutdown+0x1c0/0x220
>  sp=e00000407c927d30 bsp=e00000407c920d08 [<a00000010037d0e0>]
>                                 pci_device_shutdown+0x80/0xc0
>  sp=e00000407c927d30 bsp=e00000407c920ce8 [<a0000001004ecb70>]
>                                 device_shutdown+0xf0/0x180
>  sp=e00000407c927d30 bsp=e00000407c920cc8 [<a0000001000ac4e0>]
>                                 kernel_restart+0x60/0x120
>  sp=e00000407c927d30 bsp=e00000407c920ca8 [<a0000001000ac990>]
>                                 sys_reboot+0x3b0/0x480
>  sp=e00000407c927d30 bsp=e00000407c920c30 [<a00000010000b4e0>]
>                                 ia64_ret_from_syscall+0x0/0x20
>  sp=e00000407c927e30 bsp=e00000407c920c30 [<a000000000010620>]
>                                 ia64_ivt+0xffffffff00010620/0x400
> sp=e00000407c928000 bsp=e00000407c920c30 
> Restarting system.
> 
> I think the solution might be to free the IRQ before the
> pci_device_shutdown 

I believe you are correct.  Our other drivers appear to do this
correctly.

> Signed-off-by: Ian Wienand <ianw@gelato.unsw.edu.au>

Auke will add this and push it next week.

Thanks!

> 
> ---
> 
>  e100.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/e100.c b/drivers/net/e100.c
> index 3dbaec6..8ae5ac3 100644
> --- a/drivers/net/e100.c
> +++ b/drivers/net/e100.c
> @@ -2782,6 +2782,7 @@ static void e100_shutdown(struct pci_dev *pdev)
>  		pci_enable_wake(pdev, PCI_D3cold, 0);
>  	}
> 
> +	free_irq(pdev->irq, netdev);
>  	pci_disable_device(pdev);
>  	pci_set_power_state(pdev, PCI_D3hot);
>  }
-
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