Re: ehci_hcd related S3 lockup on ASUS laptops, again

[Andrey Rahmatullin <wrar@wrar.name>]

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On Thu, Apr 12, 2012 at 10:28:31AM -0400, Alan Stern wrote:
> Here's a diagnostic patch that will give us a little more information.  
> Keep the previous change (so that pci_prepare_to_sleep gets called 
> whether ehci-hcd is bound or not) and let's see what it says.  Try 
> doing it both with and without ehci-hcd bound.  Running this with "echo 
> devices >/sys/power/pm_test" ought to be good enough.
If bound: "target 3 wakeup 1 error 0" for both controllers. If not bound,
pci_prepare_to_sleep is not called for ehci_hcd.
> 
> Alan Stern
> 
> 
> 
> Index: usb-3.4/drivers/pci/pci.c
> ===================================================================
> --- usb-3.4.orig/drivers/pci/pci.c
> +++ usb-3.4/drivers/pci/pci.c
> @@ -1720,6 +1720,9 @@ int pci_prepare_to_sleep(struct pci_dev
>  
>  	error = pci_set_power_state(dev, target_state);
>  
> +	dev_info(&dev->dev, "target %d wakeup %d error %d\n",
> +			target_state, device_may_wakeup(&dev->dev), error);
> +
>  	if (error)
>  		pci_enable_wake(dev, target_state, false);
>  
> 
> 

-- 
WBR, wRAR

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