[Trac #914] Wireless interface enters "frozen mode"

Zarro Boogs per Child bugtracker at laptop.org
Thu Apr 19 20:57:20 EDT 2007


#914: Wireless interface enters "frozen mode"
----------------------+-----------------------------------------------------
 Reporter:  jcardona  |        Owner:  luisca 
     Type:  defect    |       Status:  new    
 Priority:  high      |    Milestone:  BTest-3
Component:  wireless  |   Resolution:         
 Keywords:            |  
----------------------+-----------------------------------------------------
Changes (by luisca):

  * owner:  josepht => luisca

Comment:

 The function usb_submit_urb we use does not time out and blocks the reuse
 of the URB for new transmissions until the current one is complete, so
 when a URB is ignored from the device the driver cannot send any more
 packets or commands.

 When we indirectly trigger the completion callback function (with
 usb_unlink_urb()) the driver will be able to send a new urb, which is
 again ignored.  We can repeat this process but still do not know why the
 URBs are ignored.  When in this state, the firmware is alive and able to
 send URBs to the driver (tcpdump -i msh0 will report traffic).

-- 
Ticket URL: <http://dev.laptop.org/ticket/914#comment:8>
One Laptop Per Child <http://laptop.org/>



More information about the Bugs mailing list