#11931 NORM 1-firmw: XO-1 errors with a USB hub connected on port N if slot N in hub has a device connected

[Zarro Boogs per Child]

#11931: XO-1 errors with a USB hub connected on port N if slot N in hub has a
device connected
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           Reporter:  Quozl                |       Owner:  Quozl               
               Type:  defect               |      Status:  new                 
           Priority:  normal               |   Milestone:  1-firmware          
          Component:  ofw - open firmware  |     Version:  Development firmware
         Resolution:                       |    Keywords:                      
        Next_action:  diagnose             |    Verified:  0                   
Deployment_affected:                       |   Blockedby:                      
           Blocking:                       |  
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Comment(by Quozl):

 Also occurs with a USB Ethernet device.

 Also occurs with an early USB FLASH drive that has an embedded hub, only
 if the device is inserted in the lower right port of the XO-1.

 Some deep debugging has shown that when probing the port of the hub, Open
 Firmware is again loading the usb,class9 fcode driver, which is the hub
 class driver, which results in the hub being probed again, a recursive
 behaviour.

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Ticket URL: <http://dev.laptop.org/ticket/11931#comment:2>
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