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From: Bjorn Helgaas <helgaas@kernel.org>
To: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	linux-pci@vger.kernel.org, kernel@pengutronix.de
Subject: Re: [PATCH] PCI: endpoint: Make struct pci_epf_driver::remove return void
Date: Mon, 12 Jul 2021 15:51:49 -0500	[thread overview]
Message-ID: <20210712205149.GA1675719@bjorn-Precision-5520> (raw)
In-Reply-To: <20210223090757.57604-1-u.kleine-koenig@pengutronix.de>

On Tue, Feb 23, 2021 at 10:07:57AM +0100, Uwe Kleine-König wrote:
> The driver core ignores the return value of pci_epf_device_remove()
> (because there is only little it can do when a device disappears) and
> there are no pci_epf_drivers with a remove callback.
> 
> So make it impossible for future drivers to return an unused error code
> by changing the remove prototype to return void.
> 
> The real motivation for this change is the quest to make struct
> bus_type::remove return void, too.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Acked-by: Bjorn Helgaas <bhelgaas@google.com>

Can you just include this with the rest of your series that depends on
it, like you did for the s390 patches, so they're all together?

> ---
>  drivers/pci/endpoint/pci-epf-core.c | 5 ++---
>  include/linux/pci-epf.h             | 2 +-
>  2 files changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
> index 7646c8660d42..a19c375f9ec9 100644
> --- a/drivers/pci/endpoint/pci-epf-core.c
> +++ b/drivers/pci/endpoint/pci-epf-core.c
> @@ -389,15 +389,14 @@ static int pci_epf_device_probe(struct device *dev)
>  
>  static int pci_epf_device_remove(struct device *dev)
>  {
> -	int ret = 0;
>  	struct pci_epf *epf = to_pci_epf(dev);
>  	struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver);
>  
>  	if (driver->remove)
> -		ret = driver->remove(epf);
> +		driver->remove(epf);
>  	epf->driver = NULL;
>  
> -	return ret;
> +	return 0;
>  }
>  
>  static struct bus_type pci_epf_bus_type = {
> diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
> index 6833e2160ef1..f8a17b6b1d31 100644
> --- a/include/linux/pci-epf.h
> +++ b/include/linux/pci-epf.h
> @@ -85,7 +85,7 @@ struct pci_epf_ops {
>   */
>  struct pci_epf_driver {
>  	int	(*probe)(struct pci_epf *epf);
> -	int	(*remove)(struct pci_epf *epf);
> +	void	(*remove)(struct pci_epf *epf);
>  
>  	struct device_driver	driver;
>  	struct pci_epf_ops	*ops;
> -- 
> 2.30.0
> 

  parent reply	other threads:[~2021-07-12 20:51 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-23  9:07 Uwe Kleine-König
2021-05-05 19:53 ` Uwe Kleine-König
2021-05-10 19:26 ` Uwe Kleine-König
2021-06-22  8:02   ` Uwe Kleine-König
2021-06-22  9:59 ` Kishon Vijay Abraham I
2021-06-22 10:10   ` Greg Kroah-Hartman
2021-07-05 15:46   ` Uwe Kleine-König
2021-07-08  9:23     ` Uwe Kleine-König
2021-07-08 10:15       ` Kishon Vijay Abraham I
2021-07-12 20:51 ` Bjorn Helgaas [this message]
2021-07-13  6:16   ` Uwe Kleine-König

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