# Re: \[PATCH v2 4/4\] bus: Make remove callback return void

- From: Bjorn Andersson \<hidden\>
- Date: 2021-07-06 18:08:25 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/07/6746576
- Thread: https://ratatoskr.run/linux-arm-kernel/2021/07/6746576/t.md

```text
On Tue 06 Jul 10:48 CDT 2021, Uwe Kleine-K?nig 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.
> 

Thanks for doing this!

Acked-by: Bjorn Andersson <redacted> (rpmsg and apr)

[..]
> diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
> index c1404d3dae2c..7f6fac618ab2 100644
> --- a/drivers/rpmsg/rpmsg_core.c
> +++ b/drivers/rpmsg/rpmsg_core.c
> @@ -530,7 +530,7 @@ static int rpmsg_dev_probe(struct device *dev)
>  	return err;
>  }
>  
> -static int rpmsg_dev_remove(struct device *dev)
> +static void rpmsg_dev_remove(struct device *dev)
>  {
>  	struct rpmsg_device *rpdev = to_rpmsg_device(dev);
>  	struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
> @@ -546,8 +546,6 @@ static int rpmsg_dev_remove(struct device *dev)
>  
>  	if (rpdev->ept)
>  		rpmsg_destroy_ept(rpdev->ept);
> -
> -	return err;

This leaves err assigned but never used, but I don't mind following up
with a patch cleaning that up after this has landed.

>  }
>  
>  static struct bus_type rpmsg_bus = {

Regards,
Bjorn

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