Re: [PATCH] aic94xx: Use request_firmware() to provide SAS address if the adapter lacks one

[Andrew Vasquez <andrew.vasquez@qlogic.com>]

On Mon, 08 Oct 2007, Darrick J. Wong wrote:

> On Mon, Oct 08, 2007 at 03:48:32PM -0700, Andrew Vasquez wrote:
> 
> > So how about factoring that out to a transport-level interface.  How
> > about something along the lines of the following patch, whereby the
> > software driver upon detecting no valid WWPN, makes an upcall to each
> > interface's 'request_wwn()'.  The data passed in from shost_gendev
> > should be enough for some helper script to cull relevent device bits
> > and perhaps offer some level of persistence...  Off base?
> 
> Hrm... jejb made a remark that it might be better to pass the
> scsi_host's device into request_firmware() as your example does, so I'll
> pitch in a patch to do likewise with libsas--the scsi_host knows the
> actual device it's coming from, and userland can sort that all out later
> anyway via DEVPATH.
> 
> I suppose one could also have multiple scsi_hosts per PCI device, which
> means that my first patch would stumble horribly in more than a few
> cases.

This is done already in the FC case -- NPIV.  Though with that
interface, the administrator is already responsible for assigning
proper WWNN/WWPN during creation.

> > Darrick, forgive the FC example, I don't do SAS...
> 
> That's ok, I don't do FC. :)  Looks mostly good to me...

--
av