Re: Titan Ridge xHCI may stop to working after re-plugging the dock

[Kai Heng Feng <kai.heng.feng@canonical.com>]

Hi Felipe,

at 3:23 PM, Felipe Balbi <felipe.balbi@linux.intel.com> wrote:

>
> Hi,
>
> Oliver Neukum <oneukum@suse.com> writes:
>> Am Dienstag, den 09.07.2019, 21:10 +0800 schrieb Kai-Heng Feng:
>>> Hi Mika and Mathias,
>>>
>>> I’ve filed a bug [1] which renders docking station unusable.
>>>
>>> I am not sure it's a bug in PCI, Thunderbolt or xHCI so raise the issue  
>>> to
>>> you both.
>>>
>>> [1] https://bugzilla.kernel.org/show_bug.cgi?id=203885
>>>
>>> Kai-Heng
>>
>> The issue starts before you unplug. In fact it starts before
>> the dock is even detected the first time:
>>
>> [   13.171167] rfkill: input handler disabled
>> [   19.781905] pcieport 0000:00:1c.0: PME: Spurious native interrupt!
>> [   19.781909] pcieport 0000:00:1c.0: PME: Spurious native interrupt!
>> [   20.109251] usb 4-1: new SuperSpeedPlus Gen 2 USB device number 2  
>> using xhci_hcd
>> [   20.136000] usb 4-1: New USB device found, idVendor=0bda,  
>> idProduct=0487, bcdDevice= 1.47
>> [   20.136004] usb 4-1: New USB device strings: Mfr=1, Product=2,  
>> SerialNumber=0
>> [   20.136007] usb 4-1: Product: Dell dock
>> [   20.136009] usb 4-1: Manufacturer: Dell Inc.
>> [   20.140607] hub 4-1:1.0: USB hub found
>> [   20.141004] hub 4-1:1.0: 4 ports detected
>> [   20.253025] usb 1-4: new high-speed USB device number 5 using xhci_hcd
>> [   20.403520] usb 1-4: New USB device found, idVendor=0bda,  
>> idProduct=5487, bcdDevice= 1.47
>> [   20.403521] usb 1-4: New USB device strings: Mfr=1, Product=2,  
>> SerialNumber=0
>> [   20.403522] usb 1-4: Product: Dell dock
>> [   20.403522] usb 1-4: Manufacturer: Dell Inc.
>> [   20.404348] hub 1-4:1.0: USB hub found
>>
>> This looks like a PCI issue.
>> In general, this kind of reporting sucks. We have to guess what you did  
>> at 19.781905
>
> It might be nice to know which device is generating that and why it's
> not found. This may help:
>
> diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
> index f38e6c19dd50..33285ef29362 100644
> --- a/drivers/pci/pcie/pme.c
> +++ b/drivers/pci/pcie/pme.c
> @@ -203,7 +203,7 @@ static void pcie_pme_handle_request(struct pci_dev  
> *port, u16 req_id)
>
>   out:
>  	if (!found)
> -		pci_info(port, "Spurious native interrupt!\n");
> +		pci_info(port, "Spurious native interrupt! (Bus# %d DevFn  
> %d)\n", busnr, devfn);
>  }
>
>  /**
>
>
> Also, according to what Kai-Heng said, xHCI stops working even after
> repluggin the Dock. We could be dealing with two bugs here:
>
> 1. Spurious PME event being generated by an unexistent device
> 2. xHCI not handling hot-plug very well
>
> Kai-Heng,
>
> please run your tests again and make note of when you unplugged the dock
> and when you replugged it so we can correlate the time stampts with what
> you have done otherwise we will never be able to pin-point what's going
> on.

I upgraded the system firmware, TBT firmware and docking station firmware  
to latest, and used latest mainline kernel.
Now the issue can be reproduced at the very first time I plugged the  
docking station.

Attach dmesg to BKO since there are lots of message after XHCI dyndbg is  
enabled.

Kai-Heng

>
> cheers
>
> -- 
> balbi