linux-kernel - Re: [PATCH] bus: Make remove callback return void

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Message-ID: <4c7210e4-76e4-07fe-a40c-a58e331d0a6e@redhat.com>
Date:   Tue, 6 Jul 2021 06:52:09 -0700
From:   Tom Rix <trix@...hat.com>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, Wu Hao <hao.wu@...el.com>,
        Moritz Fischer <mdf@...nel.org>, linux-fpga@...r.kernel.org
Subject: Re: [PATCH] bus: Make remove callback return void


On 7/6/21 2:50 AM, Uwe Kleine-König wrote:
> The driver core ignores the return value of this callback because there
> is only little it can do when a device disappears.
>
> This is the final bit of a long lasting cleanup quest where several
> buses were converted to also return void from their remove callback.
> Additionally some resource leaks were fixed that were caused by drivers
> returning an error code in the expectation that the driver won't go
> away.
>
> With struct bus_type::remove returning void it's prevented that newly
> implemented buses return an ignored error code and so don't anticipate
> wrong expectations for driver authors.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> ---
> Hello,
>
> this patch depends on "PCI: endpoint: Make struct pci_epf_driver::remove
> return void" that is not yet applied, see
> https://lore.kernel.org/r/20210223090757.57604-1-u.kleine-koenig@pengutronix.de.
>
> I tested it using allmodconfig on amd64 and arm, but I wouldn't be
> surprised if I still missed to convert a driver. So it would be great to
> get this into next early after the merge window closes.
>
> I send this mail to all people that get_maintainer.pl emits for this
> patch. I wonder how many recipents will refuse this mail because of the
> long Cc: list :-)
>
> Best regards
> Uwe

>   drivers/fpga/dfl.c                        | 4 +---
Reviewed-by: Tom Rix <trix@...hat.com>