linux-kernel - Re: [PATCH v2 -next] rtc: mt6397: drop free_irq of devm

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Date:   Wed, 4 Dec 2019 09:42:33 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Mao Wenan <maowenan@...wei.com>
Cc:     eddie.huang@...iatek.com, sean.wang@...iatek.com,
        a.zummo@...ertech.it, matthias.bgg@...il.com,
        dan.carpenter@...cle.com, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-rtc@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH v2 -next] rtc: mt6397: drop free_irq of devm_xx allocated
 irq

On 04/12/2019 09:40:38+0100, Alexandre Belloni wrote:
> On 04/12/2019 15:28:26+0800, Mao Wenan wrote:
> > rtc->irq is requested by devm_request_threaded_irq,
> > and request_threaded_irq. IRQs requested with this
> > function will be automatically freed on driver detach.
> > This patch remove unused error label as well.
> > 
> > Reported-by: Hulk Robot <hulkci@...wei.com>
> > Signed-off-by: Mao Wenan <maowenan@...wei.com>
> > ---
> >  v2: remove error label as Dan Carpenter suggest.
> >  drivers/rtc/rtc-mt6397.c | 7 -------
> >  1 file changed, 7 deletions(-)
> > 
> > diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c
> > index 5249fc99fd5f..14f3c4915260 100644
> > --- a/drivers/rtc/rtc-mt6397.c
> > +++ b/drivers/rtc/rtc-mt6397.c
> > @@ -287,13 +287,6 @@ static int mtk_rtc_probe(struct platform_device *pdev)
> >  	rtc->rtc_dev->ops = &mtk_rtc_ops;
> >  
> >  	ret = rtc_register_device(rtc->rtc_dev);
> > -	if (ret)
> > -		goto out_free_irq;
> > -
> > -	return 0;
> > -
> > -out_free_irq:
> > -	free_irq(rtc->irq, rtc);
> >  	return ret;
> 
> Maybe return rtc_register_device(rtc->rtc_dev); 
> 

By the way, this was already properly submitted here:
https://patchwork.ozlabs.org/patch/1193956/

So I'll apply this one once the merge window ends (it depends on the MFD
pull request, that is why I didn't apply it yet).


-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com