From: Roland Dreier <rdreier@cisco.com>
To: Philip Downer <phil@csldevices.co.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: firmware loading interface
References: <4AFD971C.3090204@csldevices.co.uk>
	<4AFD9BAF.1010200@csldevices.co.uk>
Date: Fri, 13 Nov 2009 16:35:01 -0800
In-Reply-To: <4AFD9BAF.1010200@csldevices.co.uk> (Philip Downer's message of
	"Fri, 13 Nov 2009 17:47:27 +0000")
Message-ID: <aday6mac5ai.fsf@roland-alpha.cisco.com>
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 > However our device will have flash to store the firmware in and, whilst
 > it looks as though it would be possible for us to use request_firmware
 > to provide occasional firmware upgrades from userspace, I can't find any
 > reference as to whether this is an accepted method for doing so. Could
 > someone please confirm for me whether or not it's a good idea to use
 > request_firmware for this, or perhaps point me at another standard
 > method for doing firmware updates from userspace?

I think request_firmware() is fine for this... you could have a look at
drivers/net/cxgb3 to see a device that writes new firmware to flash when
it detects a version mismatch between driver and device.

 - R.
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