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

[Johannes Stezenbach]

Johannes Stezenbach wrote:
> One thing you could do is to add some debug to
> dmx_section_feed_release_filter, like:
> 
>         struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *) filter, *f;
>         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed;
>         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
> 
>         if (down_interruptible (&dvbdmx->mutex)) {
> 		printk("ARGH: %d\n", atomic_read(dvbdmx->mutex.count));
>                 return -ERESTARTSYS;
> 	}
> 
> If the mutex count is something != 0 or 1 the someone trashed
> the memory.

Could you please try this, and when it hangs at shutdown, ^C ifconfig
and look if the ARGH line prints 0, 1 or something totally wild.

Thanks,
Johannes