linux-kernel - Re: [PATCH 0/6] bus: fsl-mc: Make remove function return void

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Date:   Mon, 13 Mar 2023 15:46:21 +0200
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc:     Stuart Yoder <stuyoder@...il.com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Roy Pledge <Roy.Pledge@....com>, Li Yang <leoyang.li@....com>,
        Horia Geantă <horia.geanta@....com>,
        Pankaj Gupta <pankaj.gupta@....com>,
        Gaurav Jain <gaurav.jain@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Vinod Koul <vkoul@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Yangbo Lu <yangbo.lu@....com>,
        Diana Craciun <diana.craciun@....nxp.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Richard Cochran <richardcochran@...il.com>,
        kernel@...gutronix.de, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        dmaengine@...r.kernel.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH 0/6] bus: fsl-mc: Make remove function return void

On Fri, Mar 10, 2023 at 11:41:22PM +0100, Uwe Kleine-König wrote:
> Hello,
> 
> many bus remove functions return an integer which is a historic
> misdesign that makes driver authors assume that there is some kind of
> error handling in the upper layers. This is wrong however and returning
> and error code only yields an error message.
> 
> This series improves the fsl-mc bus by changing the remove callback to
> return no value instead. As a preparation all drivers are changed to
> return zero before so that they don't trigger the error message.
> 
> Best regards
> Uwe
> 
> Uwe Kleine-König (6):
>   bus: fsl-mc: Only warn once about errors on device unbind
>   bus: fsl-mc: dprc: Push down error message from fsl_mc_driver_remove()
>   bus: fsl-mc: fsl-mc-allocator: Drop if block with always wrong
>     condition
>   bus: fsl-mc: fsl-mc-allocator: Improve error reporting
>   soc: fsl: dpio: Suppress duplicated error reporting on device remove
>   bus: fsl-mc: Make remove function return void
> 

Reviewed-by: Ioana Ciornei <ioana.ciornei@....com>
Tested-by: Ioana Ciornei <ioana.ciornei@....com> # sanity checks