linux-kernel - Re: Firmware versioning best practices II

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Date:	Sat, 20 Feb 2010 11:09:26 +0000
From:	David Woodhouse <dwmw2@...radead.org>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	"Luis R. Rodriguez" <mcgrof@...il.com>,
	linux-kernel@...r.kernel.org,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Marcel Holtmann <marcel@...tmann.org>,
	Vipin Mehta <Vipin.Mehta@...eros.com>
Subject: Re: Firmware versioning best practices II

On Sat, 2010-02-20 at 12:00 +0100, Johannes Berg wrote:
> That doesn't make much sense anyway. If the firmware filename is
> foo-$APIVER-$CODEVER every code change would need a corresponding driver
> change. If it is just foo-$APIVER then the $CODEVER can be embedded in
> the firmware file and printed so you know which code you're using, but
> if it doesn't influence the API I don't see why it should be part of the
> filename? 

The idea is that just like with shared libraries, you have a symlink
from the 'soname' foo-3.fw to the actual file foo-3-1.4.1.fw.

For shared libraries, it's easy to create those symlinks automatically
using ldconfig. For firmware that doesn't really work though -- since
the soname isn't encoded in the file like it is in ELF libraries.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation

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