Re: [PATCH] RFC: AMBA bus discardable probe() function

From: Dmitry Torokhov
Date: Thu Aug 05 2010 - 02:43:39 EST

On Wednesday, August 04, 2010 11:26:00 pm Linus WALLEIJ wrote:
> [Greg]
> > [Me]
> >
> > > + spin_lock(&amba_bustype.p->klist_drivers.k_lock);
> >
> > Ick, nope, you can't do this, sorry. That's a "private" structure for
> > a reason.
> Yeah I get it, but in the platform bus case what's that traversal of
> the klists actually for? I didn't get it, and was guessing that it
> was considering the case where devices spawn new devices.

It is to check if the driver actually bound to any devices and fail driver
registration if it did not - then, in case of modular build, entire driver
module might get unloaded from memory as well.

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