linux-kernel - Re: [PATCH v1 4/5] gpio: max77620: Don't handle disabled interrupts

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Message-ID: <68df4805-daf9-91c5-d755-53abc8823654@gmail.com>
Date:   Wed, 8 Jul 2020 12:19:55 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-tegra@...r.kernel.org,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 4/5] gpio: max77620: Don't handle disabled interrupts

08.07.2020 11:46, Andy Shevchenko пишет:
> On Wed, Jul 8, 2020 at 11:29 AM Dmitry Osipenko <digetx@...il.com> wrote:
>>
>> Check whether GPIO IRQ is enabled before proceeding with handling the
>> interrupt request. The interrupt handler now returns IRQ_NONE if none
>> of interrupts were handled, which is usually a sign of a problem.
> 
> ...
> 
>> -       pending = value;
>> +       pending = value & gpio->irq_enb_mask;
> 
>> +       if (!pending)
>> +               return IRQ_NONE;
> 
> for_each_set_bit() should take care of it, no?

Do you mean that the handle_nested_irq() takes care of handling
unrequested interrupts? Actually, looks like it cares. Alright, I'll
drop this patch since it should be unnecessary. Thank you for the comment!

> (and probably return with IRQ_RETVAL() macro)
> 
>>         for_each_set_bit(offset, &pending, MAX77620_GPIO_NR) {
>>                 unsigned int virq;
>