#11510 HIGH 1.75-so: Libertas device loses wireless extensions after suspend/resume cycle

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#11510: Libertas device loses wireless extensions after suspend/resume cycle
---------------------------------+------------------------------------------
           Reporter:  greenfeld  |       Owner:  pgf                              
               Type:  defect     |      Status:  new                              
           Priority:  high       |   Milestone:  1.75-software                    
          Component:  kernel     |     Version:  Development build as of this date
         Resolution:             |    Keywords:                                   
        Next_action:  diagnose   |    Verified:  0                                
Deployment_affected:             |   Blockedby:                                   
           Blocking:             |  
---------------------------------+------------------------------------------

Comment(by martin.langhoff):

 Commenting out the calls to ethtool in powerd prevents the bug. The in a
 serial session:

 {{{
 # ethtool -s eth0 wol u
 # iwconfig
 lo        no wireless extensions.

 eth0      IEEE 802.11bg  ESSID:"njambre-guest"
           Mode:Managed  Frequency:2.462 GHz  Access Point:
 00:23:69:FA:75:B8
           Bit Rate=5.5 Mb/s
           Retry  long limit:7   RTS thr:off   Fragment thr:off
           Encryption key:off
           Power Management:on
           Link Quality=70/70  Signal level=-36 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:0  Invalid misc:0   Missed beacon:0

 [  256.656680] PM: Syncing filesystems ... done.
 [  256.663687] Freezing user space processes ... (elapsed 0.02 seconds)
 done.
 [  256.689428] Freezing remaining freezable tasks ... (elapsed 0.01
 seconds) done.
 [  256.709389] Suspending console(s) (use no_console_suspend to debug)
 [  256.721466] dcon_source_switch to DCON
 [  256.745800] olpc-dcon: The DCON has control
 [  256.747027] RAYDIUM_i2c_suspend, disable i2c irq
 [  256.747406] libertas_sdio mmc1:0001:1: mmc1:0001:1: suspend: PM flags =
 0x3
 [  256.749412] [galcore]: gpu_suspend, 1358
 [  256.749442] >>>>>>[_gpu_off]@1127
 [  256.759383] <<<<<<[_gpu_off]@1145
 [  256.859639] PM: suspend of devices complete after 140.962 msecs
 [  256.859955] PM: late suspend of devices complete after 0.282 msecs
 [  256.861451] PM: early resume of devices complete after 0.547 msecs
 [  256.861547] mmp2_pm_finish
 [  256.889457] [galcore]: gpu_resume, 1369
 [  256.896304] >>>>>>[_gpu_on]@1153
 [  256.899476] <<<<<<[_gpu_on]@1173
 [  256.899558] mmc1: error -110 during resume (card was removed?)
 [  257.149461] usb 1-1: reset high speed USB device number 2 using pxau2o-
 ehci
 [  257.430182] dcon_source_switch to CPU
 [  257.430892] PM: resume of devices complete after 569.221 msecs
 [  257.514498] olpc-dcon: The CPU has control
 [  257.518572] Restarting tasks ...
 [  257.533620] done.

 bash-4.1# iwconfig eth0
 eth0      no wireless extensions.
 }}}

 The "mmc1: error -110 during resume (card was removed?)" only appears when
 we call ethtool wol -- in the resume path where the wireless extensions
 are gone.

 Then

 {{{
 # rmmod libertas_sdio
 [  351.554015] libertas_sdio: error -110 sending packet to firmware
 [  354.560641] libertas_sdio mmc1:0001:1: eth0: command 0x0024 timed out
 [  354.567089] libertas_sdio mmc1:0001:1: eth0: Timeout submitting command
 0x0024
 [  354.574770] libertas_sdio mmc1:0001:1: eth0: PREP_CMD: command 0x0024
 failed: -110
 #modprobe libertas_sdio
 [  378.626196] libertas_sdio: Libertas SDIO driver
 [  378.631093] libertas_sdio: Copyright Pierre Ossman
 [  378.636289] libertas_sdio: probe of mmc1:0001:1 failed with error -110
 }}}

 Unfortunately, on 1.75 today, the Libertas driver seems to promise
 support, so there's no smart workaround.

 {{{
 # ethtool  eth0
 Settings for eth0:
         Supports Wake-on: pumb
         Wake-on: d
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/11510#comment:8>
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