linux-kernel - Re: [RFT PATCH 1/3] gpio: eic-sprd: unregister from the irq notifier on remove()

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Date:   Wed, 13 Sep 2023 14:14:22 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andy@...nel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [RFT PATCH 1/3] gpio: eic-sprd: unregister from the irq notifier
 on remove()

On Tue, Sep 12, 2023 at 1:02 PM Baolin Wang
<baolin.wang@...ux.alibaba.com> wrote:
>
>
>
> On 9/12/2023 5:45 PM, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> >
> > This is a tristate module, it can be unloaded. We need to cleanup properly
> > and unregister from the interrupt notifier on driver detach.
> >
> > Fixes: b32415652a4d ("gpio: eic-sprd: use atomic notifiers to notify all chips about irqs")
> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> LGTM.
> Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
>

Thanks, queued patches 1 and 2.

Bart

> > ---
> >   drivers/gpio/gpio-eic-sprd.c | 19 +++++++++++++++++--
> >   1 file changed, 17 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
> > index 21a1afe358d6..9b2f9ccf8d77 100644
> > --- a/drivers/gpio/gpio-eic-sprd.c
> > +++ b/drivers/gpio/gpio-eic-sprd.c
> > @@ -580,6 +580,14 @@ static const struct irq_chip sprd_eic_irq = {
> >       .flags          = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
> >       GPIOCHIP_IRQ_RESOURCE_HELPERS,
> >   };
> > +
> > +static void sprd_eic_unregister_notifier(void *data)
> > +{
> > +     struct notifier_block *nb = data;
> > +
> > +     atomic_notifier_chain_unregister(&sprd_eic_irq_notifier, nb);
> > +}
> > +
> >   static int sprd_eic_probe(struct platform_device *pdev)
> >   {
> >       const struct sprd_eic_variant_data *pdata;
> > @@ -658,8 +666,15 @@ static int sprd_eic_probe(struct platform_device *pdev)
> >       }
> >
> >       sprd_eic->irq_nb.notifier_call = sprd_eic_irq_notify;
> > -     return atomic_notifier_chain_register(&sprd_eic_irq_notifier,
> > -                                           &sprd_eic->irq_nb);
> > +     ret = atomic_notifier_chain_register(&sprd_eic_irq_notifier,
> > +                                          &sprd_eic->irq_nb);
> > +     if (ret)
> > +             return dev_err_probe(&pdev->dev, ret,
> > +                                  "Failed to register with the interrupt notifier");
> > +
> > +     return devm_add_action_or_reset(&pdev->dev,
> > +                                     sprd_eic_unregister_notifier,
> > +                                     &sprd_eic->irq_nb);
> >   }
> >
> >   static const struct of_device_id sprd_eic_of_match[] = {