Re: config_alldevs_lock is evil

[David Young <dyoung%pobox.com@localhost>]

On Tue, Jan 12, 2010 at 08:48:21PM +0100, Matthias Drochner wrote:
> But I think there is a more general problem: The driver reads a pointer
> which can become invalid immediately after the lock is released, no
> matter how the locking is done. Or am I missing something?

No, that is a problem affecting virtually every driver.  We need to take
care to get driver subroutines out of the device_t+softc before we tear
them down.  There are many softc entry points, so fixing the problem
throughout the kernel looks like a hard problem.

Dave

-- 
David Young             OJC Technologies
dyoung%ojctech.com@localhost      Urbana, IL * (217) 278-3933