#8301 BLOC 8.2.0 (: Fast suspend/resume cycle causes a libertas crash

[Zarro Boogs per Child]

#8301: Fast suspend/resume cycle causes a libertas crash
------------------------+---------------------------------------------------
   Reporter:  cjb       |       Owner:  dsaxena                        
       Type:  defect    |      Status:  new                            
   Priority:  blocker   |   Milestone:  8.2.0 (was Update.2)           
  Component:  kernel    |     Version:  not specified                  
 Resolution:            |    Keywords:  blocks-:8.2.0 cjbfor8.2 relnote
Next_action:  diagnose  |    Verified:  0                              
  Blockedby:            |    Blocking:                                 
------------------------+---------------------------------------------------

Comment(by cjb):

 Here's an easy way to reproduce this without involving suspend/resume:

 {{{
 bash-3.2# while true; do sleep 4; rmmod usb8xxx; rmmod libertas; echo 0 >
 /sys/power/wlan-enabled; sleep 1; echo 1 > /sys/power/wlan-enabled; done
 [  275.930321] usbcore: deregistering interface driver usb8xxx
 [  276.208964] olpc-ec:  running cmd 0x35
 [  276.216321] usb 2-1: USB disconnect, address 3
 [  277.237338] olpc-ec:  running cmd 0x25
 [  277.546581] hub_port_wait_reset: portstatus=503 portchange=10
 [  277.616270] usb 2-1: new high speed USB device using ehci_hcd and
 address 4
 [  277.686501] hub_port_wait_reset: portstatus=503 portchange=10
 [  277.790819] usb 2-1: configuration #1 chosen from 1 choice
 [  280.488535] usb8xxx: Firmware ready event received
 [  280.507147] libertas: 00:17:c4:10:c4:da, fw 5.110.22p18, cap 0x000003a3
 [  280.550840] libertas: eth0: Marvell WLAN 802.11 adapter
 [  280.579188] libertas: PREP_CMD: command 0x0074 failed: 2
 [  280.596130] usb8xxx: Firmware does not seem to support PS mode
 [  280.602723] usbcore: registered new interface driver usb8xxx
 [  281.053829] usbcore: deregistering interface driver usb8xxx
 [  281.506851] libertas: SCAN_CMD failed
 [  282.253929] olpc-ec:  running cmd 0x35
 [  282.261554] usb 2-1: USB disconnect, address 4
 [  283.296720] olpc-ec:  running cmd 0x25
 [  283.622701] hub_port_wait_reset: portstatus=503 portchange=10
 [  283.682504] usb 2-1: new high speed USB device using ehci_hcd and
 address 5
 [  283.754276] hub_port_wait_reset: portstatus=503 portchange=10
 [  283.856891] usb 2-1: configuration #1 chosen from 1 choice
 [  284.646520] usb8xxx: Firmware ready event received
 [  284.680471] libertas: 00:17:c4:10:c4:da, fw 5.110.22p18, cap 0x000003a3
 [  284.725557] libertas: eth0: Marvell WLAN 802.11 adapter
 [  284.753176] libertas: PREP_CMD: command 0x0074 failed: 2
 [  284.779040] usb8xxx: Firmware does not seem to support PS mode
 [  284.792873] usbcore: registered new interface driver usb8xxx
 [  285.312541] ADDRCONF(NETDEV_UP): eth0: link is not ready
 [  286.881135] usbcore: deregistering interface driver usb8xxx
 [  297.055069] libertas: Command 6 timed out
 <perpetual hang inside rmmod>
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/8301#comment:13>
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