linux-kernel - Re: [RFC PATCH v4 1/1] serial: core: Start managing serial controllers to enable runtime PM

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Date:   Thu, 8 Dec 2022 07:52:11 +0200
From:   Tony Lindgren <tony@...mide.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Johan Hovold <johan@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-serial@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v4 1/1] serial: core: Start managing serial
 controllers to enable runtime PM

* Andy Shevchenko <andriy.shevchenko@...el.com> [221207 20:28]:
> We can avoid this check by caching the platform device.
> 
> 	struct platform_device *ctrl_pdev = NULL;
> 
> 	if (...) {
> 		ctrl_pdev = to_platform_device(ctrl_dev);
> 	}
> 
> 	platform_device_del(ctrl_pdev);

OK yeah that's nicer :)

> > Shouldn't you call platform_device_unregister()?

Outside the error path it should be platform_device_unregister(),
I'll check. Thanks also for your other comments.

Regards,

Tony