svn commit: r200874 - in head/sys: dev/auxio sparc64/central sparc64/ebus sparc64/fhc sparc64/pci sparc64/sbus sparc64/sparc64

[Marius Strobl]

On Tue, Dec 22, 2009 at 05:20:00PM -0500, John Baldwin wrote:
> On Tuesday 22 December 2009 4:02:46 pm Marius Strobl wrote:
> > Author: marius
> > Date: Tue Dec 22 21:02:46 2009
> > New Revision: 200874
> > URL: http://svn.freebsd.org/changeset/base/200874
> > 
> > Log:
> >   Enroll these drivers in multipass probing. The motivation behind this
> >   is that the JBus to EBus bridges share the interrupt controller of a
> >   sibling JBus to PCIe bridge (at least as far as the OFW device tree
> >   is concerned, in reality they are part of the same chip) so we have to
> >   probe and attach the latter first. That happens to be also the case
> >   due to the fact that the JBus to PCIe bridges appear first in the OFW
> >   device tree but it doesn't hurt to ensure the right order.
> 
> Hmm, I'm curious why you used BUS_PASS_DEFAULT with EARLY_DRIVER_MODULE()?  
> The intent was that EARLY_DRIVER_MODULE() only really be used for drivers that 
> used a pass other than BUS_PASS_DEFAULT.

Just in order to document as good as possible that the use of
another pass level has been considered but was decided to not
be the right thing to do (although dma_sbus(4) can act like a
bus BUS_PASS_BUS isn't appropriate for example) as my impression
was that at some point in time we'll want to got through the
tree and change for example all bus drivers to use BUS_PASS_BUS
etc similarly to how BUS_PROBE_* at least partially was introduced
in a sweeping fashion (causing the expected breakage).

Marius