On Fri, 12 May 2006, Johannes Stezenbach wrote:
> You know, instead of messing with *all* frontend drivers
> and the internals of dvb_unregister_frontend(), I think
> it would be much better to:
I agree with you, it would be better, but I can't think of a way to do it.
> - add dvb_attach() and dvb_detach() functions
> - leave frontend drivers unmodified
> - so nothing changes for out-of-tree STB like users like tuxbox
How can dvb_detach() work, satisfy your three requirements here, AND still
work with chained front-ends?
Without chained frontends, it's easy enough (*):
int dvb_detach(struct dvb_frontend* fe)
{
void *addr = (void*)fe->ops->release;
dvb_unregister_frontend(fe);
symbol_put_addr(addr);
}
But this doesn't work at all with chained frontends.
(*) This assumes, currently correctly, that foo_attach() and foo_release() are
in the same module and that symbol_put/get does module level ref counting and
not symbol level.
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