[linux-dvb] Re: [PATCH] fix oops from removing running dvb_net

[Holger Waechtler <holger@convergence.de>]

Hi Emard, Hi Jon,

Jon Burgess wrote:
> Emard wrote:
>
> > 2.6 a more work is needed (can someone help me there
> > for the inspiration) to secure budgets on 2.6 because the budget-core 
> > is loaded separately and MOD_INC_USE_COUNT gets bound to budget-core 
> > and not to actual budget driver
> > ...
> >
> > Emard
> >  
> You could get some inspiration from a patch I posted some time ago which 
> attempted to lock modules when the frontends where in use. In this patch 
> I passed the module reference from the card specific budget code to the 
> core in the ttpci_budget_init() call.
>
> http://www.linuxtv.org/mailinglists/linux-dvb/2003/09-2003/msg00191.html
>
> There were some problems reported with the patch not working on 2.4, but 
> I ran out of time and lacked the hardware to diagnose and fix the problem.
The intention of your patch was correct, but it seems as if nobody had 
the time to fix the open issues. Using MOD_(INC|DEC)_USE_COUNT directly 
is deprecated in 2.6 since this introduces race conditions. Emard, can 
you please review Jon's patch, check the issues metioned in the mailing 
list archive and try whether you can resolve the open issues?

Holger



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