[RFC PATCH net 2/5] net: dsa: be compatible with masters which unregister on shutdown

[Vladimir Oltean]

On Sun, Sep 12, 2021 at 03:09:29PM +0300, Vladimir Oltean wrote:
> +static int b53_mmap_shutdown(struct platform_device *pdev)
> +{
> +	struct b53_device *dev = platform_get_drvdata(pdev);
> +
> +	if (dev)
> +		b53_switch_shutdown(dev);
> +
> +	platform_set_drvdata(pdev, NULL);
> +}
> +
>  static const struct of_device_id b53_mmap_of_table[] = {
>  	{ .compatible = "brcm,bcm3384-switch" },
>  	{ .compatible = "brcm,bcm6328-switch" },
> @@ -331,6 +343,7 @@ MODULE_DEVICE_TABLE(of, b53_mmap_of_table);
>  static struct platform_driver b53_mmap_driver = {
>  	.probe = b53_mmap_probe,
>  	.remove = b53_mmap_remove,
> +	.shutdown = b53_mmap_shutdown,
>  	.driver = {
>  		.name = "b53-switch",
>  		.of_match_table = b53_mmap_of_table,

I forgot to enable all variants of the b53 driver, and as such, the mmap
version fails to build (the shutdown function should return void, not int).

I will fix this when I send the v2 patch, but I will not send that now,
as I would like to get some feedback on the approach first.