linux-kernel - Re: [PATCH v1] gpio: tegra: Fix irq_set

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Message-ID: <CAMpxmJX2BwN1Lj1GpGqoq9Yd_jGsJoRDO4ur-6nZY18DE++vVw@mail.gmail.com>
Date:   Wed, 27 Jan 2021 15:46:01 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        Peter Geis <pgwipeout@...il.com>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] gpio: tegra: Fix irq_set_affinity

On Fri, Jan 22, 2021 at 1:56 PM Linus Walleij <linus.walleij@...aro.org> wrote:
>
> On Wed, Jan 20, 2021 at 1:46 AM Dmitry Osipenko <digetx@...il.com> wrote:
>
> > The irq_set_affinity callback should not be set if parent IRQ domain
> > doesn't present because gpio-tegra driver callback fails in this case,
> > causing a noisy error messages on system suspend:
> >
> >  Disabling non-boot CPUs ...
> >  IRQ 26: no longer affine to CPU1
> >  IRQ128: set affinity failed(-22).
> >  IRQ130: set affinity failed(-22).
> >  IRQ131: set affinity failed(-22).
> >  IRQ 27: no longer affine to CPU2
> >  IRQ128: set affinity failed(-22).
> >  IRQ130: set affinity failed(-22).
> >  IRQ131: set affinity failed(-22).
> >  IRQ 28: no longer affine to CPU3
> >  IRQ128: set affinity failed(-22).
> >  IRQ130: set affinity failed(-22).
> >  IRQ131: set affinity failed(-22).
> >  Entering suspend state LP1
> >
> > Hence just don't specify the irq_set_affinity callback if parent PMC
> > IRQ domain is missing. Tegra isn't capable of setting affinity per GPIO,
> > affinity could be set only per GPIO bank, thus there is nothing to do
> > for gpio-tegra in regards to CPU affinity without the parent IRQ domain.
> >
> > Tested-by: Peter Geis <pgwipeout@...il.com> # Ouya T30
> > Tested-by: Matt Merhar <mattmerhar@...tonmail.com> # Ouya T30
> > Tested-by: Dmitry Osipenko <digetx@...il.com> # A500 T20 and Nexus7 T30
> > Fixes: efcdca286eef ("gpio: tegra: Convert to gpio_irq_chip")
> > Reported-by: Matt Merhar <mattmerhar@...tonmail.com>
> > Signed-off-by: Dmitry Osipenko <digetx@...il.com>
>
> Ick, sorry for the noise!
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
>
> Yours,
> Linus Walleij

Patch applied, thanks!

Bartosz