linux-kernel - Re: [PATCH v2 4/4] bus: Make remove callback return void

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Date:   Wed, 7 Jul 2021 07:57:03 +0200
From:   Stefan Richter <stefanr@...6.in-berlin.de>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux1394-devel@...ts.sourceforge.net
Subject: Re: [PATCH v2 4/4] bus: Make remove callback return void

On Jul 06 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.

Acked-by: Stefan Richter <stefanr@...6.in-berlin.de> (for drivers/firewire)

[...]
>  drivers/firewire/core-device.c            | 4 +---
[...]
> diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
> index 68216988391f..90ed8fdaba75 100644
> --- a/drivers/firewire/core-device.c
> +++ b/drivers/firewire/core-device.c
> @@ -187,14 +187,12 @@ static int fw_unit_probe(struct device *dev)
>  	return driver->probe(fw_unit(dev), unit_match(dev, dev->driver));
>  }
>  
> -static int fw_unit_remove(struct device *dev)
> +static void fw_unit_remove(struct device *dev)
>  {
>  	struct fw_driver *driver =
>  			container_of(dev->driver, struct fw_driver, driver);
>  
>  	driver->remove(fw_unit(dev));
> -
> -	return 0;
>  }
>  
>  static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size)
[...]
-- 
Stefan Richter
-======--=-= -=== --===
http://arcgraph.de/sr/