linux-kernel - RE: [PATCH 1/2] i2c: imx: use devm_request_threaded

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Message-ID: <DB6PR0402MB276054D75742322A734DF638881B0@DB6PR0402MB2760.eurprd04.prod.outlook.com>
Date:   Sat, 24 Oct 2020 07:39:47 +0000
From:   Peng Fan <peng.fan@....com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
CC:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] i2c: imx: use devm_request_threaded_irq to simplify
 code

> Subject: Re: [PATCH 1/2] i2c: imx: use devm_request_threaded_irq to simplify
> code
> 
> On Fri, 23 Oct 2020 at 10:27, <peng.fan@....com> wrote:
> >
> > From: Peng Fan <peng.fan@....com>
> >
> > Use devm_request_threaded_irq to simplify code
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  drivers/i2c/busses/i2c-imx.c | 10 +++-------
> >  1 file changed, 3 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-imx.c
> > b/drivers/i2c/busses/i2c-imx.c index e6f8d6e45a15..ba9d639223ec 100644
> > --- a/drivers/i2c/busses/i2c-imx.c
> > +++ b/drivers/i2c/busses/i2c-imx.c
> > @@ -1216,8 +1216,8 @@ static int i2c_imx_probe(struct platform_device
> *pdev)
> >                 goto rpm_disable;
> >
> >         /* Request IRQ */
> > -       ret = request_threaded_irq(irq, i2c_imx_isr, NULL, IRQF_SHARED,
> > -                                  pdev->name, i2c_imx);
> > +       ret = devm_request_threaded_irq(&pdev->dev, irq, i2c_imx_isr,
> NULL, IRQF_SHARED,
> > +                                       pdev->name, i2c_imx);
> 
> Really? You silently revert commit e50e4f0b85be ("i2c: imx: Fix external abort
> on interrupt in exit paths"). This is not a simplification but serious change. NAK.
> At least without proper reasoning of why this is suddenly safe.

Oh, I need look at git history before. But
Is it because i2c interrupt enabled too early? I'll try your case on i.MX8M platform.

Regards,
Peng.

> 
> Best regards,
> Krzysztof
> Best regards,
> Krzysztof