We could for example make the SCSI drivers that support PCI, register
callbacks with the PCI code. Those functions would then in turn be called
in the correct order with the probed device information.
But this wouldn't be completely right either. If we want to recognize SCSI
host adapters in the same order they are recognized by the system (e.g. for
compatibility with other operating systems running on the same system), we need
to recognize that fact that the BIOS on most boards will probe for and attach
all the host adapters it knows how to handle. This will cause problems with
the above scheme when different brands or models of host adapter are present in
the same system. Unfortunately, there's no way of reliably predicting which of
the host adapter BIOS extensions will get control first.
Ultimately, I think we'll need to provide a way for the user to specify the
driver probe order, rather than editing hosts.c as is necessary now.
Leonard