netdev - Re: [PATCH net-next v2] firmware_loader: Expand Firmware upload error codes with firmware invalid error

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Message-ID: <20231122114325.5bacca5a@kmaincent-XPS-13-7390>
Date: Wed, 22 Nov 2023 11:43:25 +0100
From: Köry Maincent <kory.maincent@...tlin.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Luis Chamberlain <mcgrof@...nel.org>, Russ Weight
 <russ.weight@...ux.dev>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, linux-kernel@...r.kernel.org, Conor Dooley
 <conor@...nel.org>, Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2] firmware_loader: Expand Firmware upload
 error codes with firmware invalid error

On Tue, 21 Nov 2023 17:30:22 -0800
Jakub Kicinski <kuba@...nel.org> wrote:

> On Tue, 21 Nov 2023 11:50:35 +0100 Kory Maincent wrote:
> > No error code are available to signal an invalid firmware content.
> > Drivers that can check the firmware content validity can not return this
> > specific failure to the user-space
> > 
> > Expand the firmware error code with an additional code:
> > - "firmware invalid" code which can be used when the provided firmware
> >   is invalid  
> 
> Any idea what this is?
> 
> lib/test_firmware.o: warning: objtool: test_fw_upload_prepare() falls through
> to next function __cfi_test_fw_upload_cancel()
> 
> My build shows this on an incremental clang 17 build.

For my curiosity, how do you get this error?

Enabling test_firmware and building with W=1 does not show the error.

Regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com