#11471 HIGH 1.75-so: Crash in mmp2_pcm_open and related code

Zarro Boogs per Child bugtracker at laptop.org
Fri Dec 2 20:12:22 EST 2011

#11471: Crash in mmp2_pcm_open and related code
           Reporter:  greenfeld  |       Owner:  saadia                           
               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 corbet):

 Sigh, it would have been nice if it were so easy.

 I've still not actually seen this problem.  Is runin the only way to
 provoke it?

 One thing worth noting is that IRQ 48 is not just for audio; it is used
 for every DMA controller on the system.  That includes the video, memory-
 to-memory, and peripheral DMA units.  Any of them could be causing this
 problem.  Once I can reproduce it, I should be able to narrow it down
 fairly quickly.

Ticket URL: <http://dev.laptop.org/ticket/11471#comment:6>
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