linux-kernel - Re: wl1251: NVS firmware data

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Message-Id: <201412061400.11406@pali>
Date:	Sat, 6 Dec 2014 14:00:11 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	"John W. Linville" <linville@...driver.com>,
	Grazvydas Ignotas <notasas@...il.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	Pavel Machek <pavel@....cz>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Kalle Valo <kvalo@...rom.com>,
	Sebastian Reichel <sre@...g0.de>,
	David Gnedt <david.gnedt@...izone.at>
Subject: Re: wl1251: NVS firmware data

On Thursday 27 November 2014 16:13:51 Ming Lei wrote:
> > Which userspace helper programs for (automatic) firmware
> > loading are used? Can be udev configured to use own program
> > for loading
> 
> At default, udev had its builtin firmware helper, but some new
> udev stops to handle firmware request.
> 
> If the udev you are using still supports to handle firmware
> request, you can write your load helper and add your rule for
> handling the special case. Otherwise, you need to write code
> to monitor the netlink uevents from the kernel and handle
> your firmware loading request.
> 
> Thanks,
> Ming Lei

For Nokia N900 (and Maemo system) we are using older udev version 
(0.125), so here should be support for firmware helper.

And if some new udev version will not work, we can just revert 
back to older working... No need to use super-uber-fantastic 
systemd-udevd software which removing old useful code.

So looks like adding new rule file to udev for handling firmware 
requests from kernel could work...

-- 
Pali Rohár
pali.rohar@...il.com

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