[ALSA - driver 0000167]: alsamixer crashes system when snd-ioctl32 is loaded

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=167> 
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Reported By:                bons78
Assigned To:                
======================================================================
Project:                    ALSA - driver
Issue ID:                   167
Category:                   SPARC - cs4231
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Distribution:               debian/unstable
Kernel Version:             linux-2.6.4+
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Date Submitted:             03-30-2004 00:02 CEST
Last Modified:              11-22-2004 00:49 CET
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Summary:                    alsamixer crashes system when snd-ioctl32 is loaded
Description: 
alsamixer crashes system hard when snd-ioctl32 is loaded.
System still responds to some sysrq commands (sync remount boot show) -
sysrq (term killall) has no effect.
There's no chance to do any other keyboard input. No logs, no traps, no
oops. Machine still responds to ping,(even port 22 stays open) but login
via ssh is not possible. 

alsamixer, of course, is useless without the ioctl32 wrapper loaded - but
does not crash the system then.
So I suspect a problem in the ioctl32 wrapper.



======================================================================

----------------------------------------------------------------------
 eradicator - 11-22-04 00:08 
----------------------------------------------------------------------
The other problem seems to be related to pcm_hw_params.  I've got a patch
against alsa-driver.1.0.7 which changes pcm_hw_params to
DEFINE_ALSA_IOCTL_BIG(pcm_hw_params) like in the 2.6.9 kernel sources...
I'm guessing this was recently changed, and reverting back to the old way
causes it to work on sparc...

----------------------------------------------------------------------
 eradicator - 11-22-04 00:49 
----------------------------------------------------------------------
Hmm... it would make sense to me to change the userspace struct to pack
rather than the otherway around because we are using 2 different compilers
for kernel and userspace code, and those different compilers may padd
differently.  The latest patch doesn't address that issue (and I'm leaving
it up to the alsa devs)...

The latest patch applies cleanly against alsa-drier-1.0.7, and it produces
working modules with linux-2.6.7-gentoo-r14 and vanilla linux-2.6.9.  You
need to first apply the patch in bug
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=658 to compile sparc
modules with
the alsa-driver package.

This final patch is now being used by Gentoo.

sjoerd: Thanks for all your help =)

Issue History
Date Modified  Username       Field                    Change              
======================================================================
03-30-04 00:02 bons78         New Issue                                    
03-30-04 00:02 bons78         Distribution              => debian/unstable 
03-30-04 00:02 bons78         Kernel Version            => linux-2.6.4+    
04-13-04 19:41 tiwai          Note Added: 0000795                          
07-04-04 22:32 weeve          Note Added: 0001381                          
07-05-04 08:09 eradicator     Issue Monitored: eradicator                    
11-19-04 05:45 weeve          Note Added: 0002474                          
11-19-04 05:46 weeve          Issue Monitored: weeve                       
11-19-04 05:55 rlrevell       Note Added: 0002475                          
11-20-04 10:23 eradicator     Note Added: 0002478                          
11-20-04 11:14 eradicator     Note Added: 0002479                          
11-20-04 16:36 sjoerd         File Added: sparc-alsa-cvs.patch                  
 
11-20-04 16:36 sjoerd         Note Added: 0002480                          
11-20-04 18:15 sjoerd         Issue Monitored: sjoerd                      
11-21-04 03:05 eradicator     Note Added: 0002482                          
11-21-04 11:34 eradicator     File Added: alsa-driver-1.0.7.ioctl32.patch       
            
11-21-04 11:39 eradicator     Note Added: 0002485                          
11-21-04 11:49 eradicator     File Added: alsa-driver-1.0.7.ioctl32.patch       
            
11-21-04 11:50 eradicator     Note Added: 0002486                          
11-21-04 11:57 eradicator     Note Added: 0002487                          
11-21-04 12:54 sjoerd         Note Added: 0002488                          
11-21-04 17:44 sjoerd         Note Added: 0002489                          
11-21-04 21:26 eradicator     Note Added: 0002490                          
11-21-04 21:36 eradicator     Note Added: 0002491                          
11-21-04 22:46 sjoerd         Note Added: 0002492                          
11-22-04 00:08 eradicator     Note Added: 0002493                          
11-22-04 00:14 eradicator     File Added: alsa-driver-1.0.7-ioctl32.patch       
            
11-22-04 00:49 eradicator     Note Added: 0002494                          
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