On Tue, Oct 09, 2007 at 09:41:47AM -0700, Andrew Vasquez wrote:
> On Tue, 09 Oct 2007, James Smart wrote:
>
> > Why do you prefer request_firmware() vs something over sysfs ?
> >
> > Does environments like the kdump kernel also have access to data needed
> > by request_firmware() ?
Assuming the driver-loading parts of the kdump kernel's initrd are the
same (udev, bunch of modules, firmwares, etc) as the regular kernel's
initrd, this shouldn't be a problem.
In the specific case of aic94xx, one needs request_firmware() and
associated infrastructure to load firmware blobs into the controller in
order to issue any I/O at all.
> There's already much in the way of automation and infrastructure
> present in supporting the request_firwmare() interfaces (perhaps not
> the best of names) which can provide for a level of flexibility beyond
> a basic 'soft_port_name' interface.
>
> Though I don't see why both can't coexist cleanly -- I take it the use
> case you are considering is: software recognizes no valid WWPN
> available, query via request_firmware() fails, software halts
> initialization (rather than fail), and awaits the admin to poke
> '0x123456.. > /sys/.../fc_host/soft_port_name', causing a ping to the
> driver and continuation of initialization with requested portname?
Hmm... could we use such a sysfs attribute to reassign adapter WWNs at
arbitrary times? Is that even a good idea?
--D
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