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

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Message-ID: <20071009164147.GB19854@plap3.qlogic.org>
Date:	Tue, 9 Oct 2007 09:41:47 -0700
From:	Andrew Vasquez <andrew.vasquez@...gic.com>
To:	James Smart <James.Smart@...lex.Com>
Cc:	"Darrick J. Wong" <djwong@...ibm.com>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Alexis Bruemmer <alexisb@...ibm.com>,
	James Bottomley <james.bottomley@...eleye.com>
Subject: Re: [PATCH] aic94xx: Use request_firmware() to provide SAS address
	if the adapter lacks one

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() ?

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?
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