#1752 NORM Untriag: USB wireless suspend/resume failure at setup phase

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#1752: USB wireless suspend/resume failure at setup phase
-----------------------+----------------------------------------------------
  Reporter:  marcelo   |       Owner:  marcelo  
      Type:  defect    |      Status:  new      
  Priority:  normal    |   Milestone:  Untriaged
 Component:  wireless  |     Version:           
Resolution:            |    Keywords:           
  Verified:  0         |  
-----------------------+----------------------------------------------------
Comment (by marcelo):

 Additional info: a full reset of the EHCI host controller (performed by
 reloading the ehci-hcd module), does _not_ fix the problem:

 {{{
 suspend
 ...
 resume
 ...
 [    2.277616] usb_start_wait_urb: wait done
 [    2.281657] USB_REQ_SET_CONFIGURATION!
 [    2.285518] usb 1-1: can't restore configuration #1 (error=-71)
 ...
 [   14.134066] usbcore: deregistering interface driver usb8xxx
 [   36.122507] ehci_hcd 0000:00:0f.5: remove, state 1
 [   36.122859] usb usb1: USB disconnect, address 1
 ...
 [   42.858811] ehci_hcd 0000:00:0f.5: EHCI Host Controller
 ...
 [   42.889239] ehci_hcd 0000:00:0f.5: USB 2.0 started, EHCI 1.00, driver
 10 Dec
 2004
 ...
 [   43.436950] usb 1-1: unable to read config index 0 descriptor/start
 [   43.436970] usb 1-1: chopping to 0 config(s)
 }}}

 Which, from my understand, discards the possibility of 5536 errata #56
 from hitting us
 (Stability issues upon USB EHC Port Suspend in S0). The suggested
 workaround for this errata
 is a full EHCI reinitialization.

 I also attempted to reset the wireless module using the special GPIO on
 the EC. The reset
 succeeds (as can be seen by the wireless LEDs going off), but the
 communication is still
 hosed.

-- 
Ticket URL: <http://dev.laptop.org/ticket/1752#comment:2>
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