Am 05.09.2016 um 04:51 schrieb Peter Chen:
> On Fri, Sep 02, 2016 at 08:20:35PM +0200, Stefan Wahren wrote:
>> Hi Peter,
>>
>>> Stefan Wahren <stefan.wahren@xxxxxxxx> hat am 25. August 2016 um 19:17
>>> geschrieben:
>>>
>>>
>>> Hi,
>>>
>>>> Peter Chen <hzpeterchen@xxxxxxxxx> hat am 25. August 2016 um 11:16
>>>> geschrieben:
>>>>
>>>>
>>>> On Thu, Aug 25, 2016 at 08:27:03AM +0200, Stefan Wahren wrote:
>>>>> Am 25.08.2016 um 08:44 schrieb Peter Chen:
>>>>>> On Thu, Aug 25, 2016 at 07:06:12AM +0200, Stefan Wahren wrote:
>>>>>>> Hi Alan,
>>>>>>>
>>>>>>> i tried the following patch:
>>>>>>> --- a/drivers/usb/chipidea/host.c
>>>>>>> +++ b/drivers/usb/chipidea/host.c
>>>>>>> @@ -185,6 +185,8 @@ static void host_stop(struct ci_hdrc *ci)
>>>>>>>
>>>>>>> if (hcd) {
>>>>>>> usb_remove_hcd(hcd);
>>>>>>> + ci_role_stop(ci);
>>>>>>> + synchronize_irq(ci->irq);
>>>>>> Would you please just add below line to see if this problem can be
>>>>>> fixed?
>>>>>> + ci->role = CI_ROLE_END;
>>>>>>
>>>>>> When ci->role is CI_ROLE_END, neither host nor device interrupt handler
>>>>>> will run.
>>>>> I would add this before synchronize_irq() as Alan suggested.
>>> i replaced my ci_role_stop(ci) with ci->role = CI_ROLE_END and the panic
>>> disappear:
>>>
>>> [ 114.980000] ci_hdrc ci_hdrc.0: remove, state 1
>>> [ 114.990000] usb usb1: USB disconnect, device number 1
>>> [ 115.000000] usb 1-1: USB disconnect, device number 2
>>> [ 115.000000] usb 1-1.1: USB disconnect, device number 3
>>> [ 115.030000] smsc95xx 1-1.1:1.0 eth0: unregister 'smsc95xx'
>>> usb-ci_hdrc.0-1.1,
>>> smsc95xx USB 2.0 Ethernet
>>> [ 115.220000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
>>> [ 115.230000] otgsc:0x4e20, usbsts:0x0
>>> [ 115.240000] reboot: System halted
>> do you need more information?
>>
> I would like to know which interrupt is triggered at that time?
So the added debug messages didn't help to find the interrupt source (
otgsc:0x4e20, usbsts:0x0 ) ?
Any other suggestions ?
At least i would like to create a patch with Alan's suggestion before
4.8 is final.
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