Hi Peter, > Stefan Wahren <stefan.wah...@i2se.com> hat am 25. August 2016 um 19:17 > geschrieben: > > > Hi, > > > Peter Chen <hzpeterc...@gmail.com> 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? What would be the next step? Stefan > > Regards > Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html