linux-kernel - Re: [PATCH] firmware loader: allow disabling of udev as firmware loader

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Message-ID: <CAG-2HqUDQ3e-cq4y3zgehz6J8E6LsTCUfqvMEqPEqG7aBmEeRg@mail.gmail.com>
Date:	Mon, 9 Jun 2014 15:53:11 +0200
From:	Tom Gundersen <teg@...m.no>
To:	B_B_Singh@...l.com
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Ming Lei <ming.lei@...onical.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Abhay Salunke <Abhay_Salunke@...l.com>,
	Stefan Roese <sr@...x.de>, Arnd Bergmann <arnd@...db.de>,
	Kay Sievers <kay@...y.org>, Matt_Domsch@...l.com,
	Srinivas_G_Gowda@...l.com, Stuart_Hayes@...l.com
Subject: Re: [PATCH] firmware loader: allow disabling of udev as firmware loader

Hi Balaji,

On Mon, Jun 9, 2014 at 3:26 PM,  <B_B_Singh@...l.com> wrote:
> The existing BIOS-DUP’s will not work on latest kernel, which has
> CONFIG_FW_LOADER_USER_HELPER=n  configured in Kernel config by default which
> is not expected by the dell_rbu.
>
>
>
> We have made a changes in BIOS-Dell Update Package so that BIOS-DUP will
> pick the payload from the /lib/firmware/ path & update the BIOS even when
> CONFIG_FW_LOADER_USER_HELPER=n is configured .
>
>
>
> We have tested this patch
> http://www.spinics.net/lists/kernel/msg1755247.html  with latest BIOS Dell
> Update Package (which has new implementation for the BIOS update i.e,
> copying the BIOS payload in /lib/firmware path & dell_rbu picks the payload
> from the same path)  & with  stable upstream       kernel-3.14.5 & we don’t
> see any negative effects/errors for dell_rbu.

Thanks for testing! May I ask if the dell_rbu still works with my
patch and CONFIG_FW_LOADER_USER_HELPER=n with the old userspace? The
intention was that you should not need to change anything in userspace
at all.

By the way, there is now a new version of this patch:
<https://lkml.org/lkml/2014/6/4/327>, which should allow your (old or
new userspace) Dell RBU to work with FW_LOADER_USER_HELPER_FALLBACK=n,
so maybe it would be best to test that instead.

Cheers,

Tom
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