[Etherboot-developers] [PATCH] PCI updates to avoid e1000 chaos

[<ebi...@ln...>]

I just had a good hard look at the pci initialization code and there
are bad comments and strage behaviors.  And a lot of code
that looks like it should be doing one thing but it is really doing something
else.

Towards making this all work I have rewritten how pci devices are probed,
and the code now should actually support attempting to boot off of the next
pci device.

The big changes are:
We always return if we find a matching pci device
regardless of weather an ``ioaddr'' is valid.

We walk the list of drivers, and then the list of their devices.
Instead of walking the list of possible devices, followed by the
list of drivers.

The pci_ioaddrs is now a local variable in eth_probe to show their
is no magic going on.

We can now restart a scan through the pci devices to find the next
one.

Only the sis900 and e1000 drivers were touched.

For the e1000 I have it read the information it needs directly
from pci configuration space.  

The sis900 driver needed an update to handle the saner pci scanning.

ftp://download.lnxi.com/pub/src/etherboot/etherboot-5.0.6rc3.e1000.diff

I was having a problem with the eepro100 when testing this patch,
where it was locking up halfway through loading an image.  
I can reproduce the problem without this patch.  So that is my
next thing to investigage.  

Eric