#12657 NORM 13.2.0: Fix btmrvl/mwifiex suspend interactions

[Zarro Boogs per Child]

#12657: Fix btmrvl/mwifiex suspend interactions
------------------------------+---------------------------------------------
           Reporter:  dsd     |       Owner:  pgf          
               Type:  defect  |      Status:  new          
           Priority:  normal  |   Milestone:  13.2.0       
          Component:  kernel  |     Version:  not specified
         Resolution:          |    Keywords:               
        Next_action:  code    |    Verified:  0            
Deployment_affected:          |   Blockedby:               
           Blocking:          |  
------------------------------+---------------------------------------------

Comment(by dsd):

 Kernel preemption on again. no_console_suspend enabled. I replaced the
 netif_carrier_off() call with a call to msleep(1000) as a nice hint to the
 scheduler to run another task. It hangs.  And a short time later prints
 some messages similar to what Paul posted above:

 {{{
 [   49.072163] ------------[ cut here ]------------
 [   49.072169] WARNING: at net/sched/sch_generic.c:256 dev_watchdog
 [   49.083939] NETDEV WATCHDOG: eth1 (mwifiex_sdio): transmit queue 0
 timed out
 [   49.093977] ---[ end trace 1b56ae15412359c1 ]---
 [   49.093977] mwifiex_sdio mmc0:0001:1: 4294942204 : Tx timeout
 }}}

 So, whatever task gets scheduled at this point never returns, but does not
 hard hang the system. And it seems like there is some mwifiex badness
 happening around this time which may well be the real cause of the issue.

-- 
Ticket URL: <http://dev.laptop.org/ticket/12657#comment:9>
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