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

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Message-ID: <20231121173022.3cb2fcad@kernel.org>
Date:   Tue, 21 Nov 2023 17:30:22 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Kory Maincent <kory.maincent@...tlin.com>
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 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.