Re: Kernel Firmware Loading

[Patrick Mansfield <patmans@us.ibm.com>]

On Fri, Nov 04, 2005 at 08:14:40PM +0500, Alexander E. Patrakov wrote:

> >>Please propose how are you going to tell the kernel the list of 
> >>"essential" devices.
> >>   
> >>
> >
> >Hopefully the list of essential devices needing coldplugging is empty.  I 
> >had in mind:
> >just what's needed to mount the root filesystem.  What's the problem with 
> >that?
> > 
> >
> E.g., you want to specify that only /dev/sda is needed because you have 
> your root filesystem on your SCSI disk. But your SCSI controller is a 
> PCI device. So we need to walk over all PCI devices and bind drivers to 
> them. One of them will register itself as a SCSI controller driver. But 
> all PCI devices before that one will also be initialized then, and may 
> (or may not) want firmware or other initialization!

So the proposed (or current?) hotplug firmware interface can block other
PCI (or other) devices from binding?

-- Patrick Mansfield


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