#2353 BLOC Trial-2: Hang (USB, DCON) going to suspend.

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#2353: Hang (USB, DCON) going to suspend.
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 Reporter:  cjb      |       Owner:  marcelo           
     Type:  defect   |      Status:  new               
 Priority:  blocker  |   Milestone:  Trial-2           
Component:  kernel   |     Version:  Git as of bug date
 Keywords:  power    |    Verified:  0                 
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 {{{
 -bash-3.2# [  112.143312] olpm-pm:  PM_PWRBTN event received
 [  112.155240] PM: Preparing system for mem sleep
 [  112.159828] Stopping tasks ... done.
 [  112.166394] platform olpc-battery.0: suspend
 [  112.170800] ac97 0-0:AD1888: suspend
 [  112.174401] ov7670 1-0042: suspend
 [  112.177918] leds-olpc leds-olpc: suspend
 [  112.181885] platform dcon: suspend
 [  112.185396] OLPC-DCON 0-000d: suspend
 [  112.189082] psmouse serio1: suspend
 [  112.196905] olpm-pm:  SCI 0x1 received
 [  112.202788] olpm-pm:  SCI 0x0 received
 [  112.206559] atkbd serio0: suspend
 [  112.209990] i8042 i8042: suspend
 [  112.213234] usb8xxx 1-1:1.0: suspend
 [  112.216831] usb 1-1: suspend
 [  112.287122] olpc-dcon: DCONLOAD_MISSED interrupt
 [  121.085535] olpm-pm:  PM_PWRBTN event received
 [  128.746959] olpm-pm:  SCI 0x4 received
 [  128.752838] olpm-pm:  SCI 0x0 received
 }}}

 (The pwrbtn/sci are me trying to wake up the machine.  We can see that
 it's still running in kernelspace, since it's processing interrupts, but
 it's hung with tasks suspended trying to suspend usb 1-1.)

 It could be usb 1-1, dcon, or an interaction between the two..

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Ticket URL: <https://dev.laptop.org/ticket/2353>
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