linux-kernel - RE: [PATCH v2] alarmtimer: Fix rebind failure

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Message-ID: <TYCPR01MB112697A5D4B57101CDE27C88D86CEA@TYCPR01MB11269.jpnprd01.prod.outlook.com>
Date:   Mon, 9 Oct 2023 15:30:04 +0000
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
CC:     John Stultz <jstultz@...gle.com>, Stephen Boyd <sboyd@...nel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Biju Das <biju.das.au@...il.com>,
        "linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>
Subject: RE: [PATCH v2] alarmtimer: Fix rebind failure

Hi Thomas Gleixner,

> Subject: Re: [PATCH v2] alarmtimer: Fix rebind failure
> 
> On Fri, Sep 22 2023 at 09:12, Biju Das wrote:
> > +static void alarmtimer_rtc_remove_device(struct device *dev) {
> > +	struct rtc_device *rtc = to_rtc_device(dev);
> > +
> > +	if (rtcdev == rtc) {
> > +		module_put(rtc->owner);
> > +		if (device_may_wakeup(rtc->dev.parent))
> > +			device_init_wakeup(&alarmtimer_pdev->dev, false);
> > +
> > +		platform_device_unregister(alarmtimer_pdev);
> > +		put_device(dev);
> > +		alarmtimer_pdev = NULL;
> > +		rtcdev = NULL;
> > +	}
> 
> That's broken versus alarmtimer_get_rtcdev() and any user of it.

You mean we should update[1] (charger-manager driver)as it is the one using alarmtimer_get_rtcdev()??

[1] https://elixir.bootlin.com/linux/v6.6-rc5/source/drivers/power/supply/charger-manager.c#L1447

Cheers,
Biju