linux-kernel - ipmi_si feature request: SMBIOS-based autoloading

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Message-ID: <CALCETrXE+BapduFfKiiSujccaffdg8vEtvHw-mL0yV4nxNDNBA@mail.gmail.com>
Date:	Sun, 24 Jan 2016 17:45:07 -0800
From:	Andy Lutomirski <luto@...nel.org>
To:	Corey Minyard <minyard@....org>,
	OpenIPMI Developers <openipmi-developer@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	brijeshkumar.singh@....com, Jean Delvare <jdelvare@...e.de>
Subject: ipmi_si feature request: SMBIOS-based autoloading

ipmi_si doesn't autoload on systems where it's found via SMBIOS.
Could that be fixed?

If I were doing it, I'd suggest rigging up some code that's compiled
in to the main kernel even if ipmi_si is a module that creates the
platform device if the dmi device is there and then set up a modalias
so that the platofrm device causes ipmi_si to load.

(In general, having the same driver create the platform device and
register the platform driver means that autoloading is unlikely to
work right.  See arch/x86/kernel/pmem.c for an example of a weird
legacy device that gets this right.)

Alternatively, maybe /sys/firmware/dmi could learn how to advertise
modaliases.  But that might be a giant mess to solve a tiny problem.

--Andy