Re: [PATCH] Register PCI host bridge resource earlier

[Sergei Shtylyov <sshtylyov@ru.mvista.com>]

Hello.

Thomas Bogendoerfer wrote:

> PCI based SNI RM machines have their EISA bus behind an Intel PCI/EISA
> bridge. So the PCI IO range must start at 0x0000. Changing that will
> break the PCI bus, because i8259.c already has registered it's IO
> addresses before the PCI bus gets initialized. Below is a patch,
> which will register the PCI host bridge resources inside
> register_pci_controller(). It also changes i8259.c to use insert_region(),
> because request_resource() will fail, if the IO space of the PIT hanging
> of the PCI host bridge (maybe passing the resource parent to
> init_i8259_irqs() is a cleaner fix for that).

    First, I don't understand how PIT and PIC resources may intersect. Then, 
IIUC, using inert_resource() will cause PIT resource be the child of the PIC 
resource which doesn't make sense either.

WBR, Sergei