linux-kernel - Re: [PATCH v1 0/3] Tegra GPIO: Minor code clean up

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Message-ID: <b108c394-cdbc-e6c7-1688-69e05eea2279@gmail.com>
Date:   Mon, 16 Dec 2019 17:45:57 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     linux-gpio@...r.kernel.org, linux-tegra@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 0/3] Tegra GPIO: Minor code clean up

15.12.2019 21:30, Dmitry Osipenko пишет:
> Hello,
> 
> I was investigating why CPU hangs during of GPIO driver suspend and in
> the end it turned out that it is a Broadcom WiFi driver problem because
> it keeps OOB wake-interrupt enabled while WLAN interface is DOWN and this
> may cause a bit weird CPU hang on writing to INT_ENB register during of
> GPIO driver suspend. Meanwhile I also noticed that a few things could be
> improved in the driver, that's what this small series addresses.
> 
> Dmitry Osipenko (3):
>   gpio: tegra: Use generic readl_relaxed/writel_relaxed accessors
>   gpio: tegra: Properly handle irq_set_irq_wake() error
>   gpio: tegra: Use NOIRQ phase for suspend/resume
> 
>  drivers/gpio/gpio-tegra.c | 21 ++++++++++-----------
>  1 file changed, 10 insertions(+), 11 deletions(-)
> 

For the reference, here is the WiFi driver fix:

https://patchwork.ozlabs.org/patch/1209997/