[linux-dvb] ifconfig locks on down - B2C2 flexcop.

Johannes Stezenbach js at linuxtv.org
Tue Jul 12 19:00:59 CEST 2005


stonewall at inebraska.com wrote:
> Using the 2.6.12.2 kernel, and the new flexcop driver, when I go to bring my 
> devices down so they can be unloaded (for reboot or otherwise), the:
> 
> ifconfig <dev> down
> 
> On the last device locks at the ifconfig.  It doesn't lock the machine, and if 
> this is being done from command line, it can be Ctrl-C out of . . . but is 
> problematic for reboots.
> 
> This is using the B2C2 skystar2 card, using the latest b2c2_flexcop drivers on 
> the 2.6.12 kernel.  I have created several dvb0_? devices for different PIDs.  
> And it's always the *last* one that does the lock at ifconfig down.  This did 
> not occur with 2.6.11.11.

You could build your kernel with CONFIG_MAGIC_SYSRQ=y,
CONFIG_FRAME_POINTER=y and CONFIG_KALLSYMS_ALL=y, and
when ifconfig hands press SysRq-T and post the calltrace
of ifconfig (from dmesg output). Then we could see
where it hangs.

Johannes




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