linux-kernel - Re: [PATCH v3 2/7] clocksource: Add Tegra186 timers support

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Message-ID: <894dbbd4-be96-13ce-96b9-432b5d71f06b@gmail.com>
Date:   Fri, 3 Apr 2020 23:58:40 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Jon Hunter <jonathanh@...dia.com>, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/7] clocksource: Add Tegra186 timers support

03.04.2020 23:22, Thierry Reding пишет:
...
> +static int tegra186_wdt_set_timeout(struct watchdog_device *wdd,
> +				    unsigned int timeout)
> +{
> +	struct tegra186_wdt *wdt = to_tegra186_wdt(wdd);
> +
> +	if (watchdog_active(&wdt->base))
> +		tegra186_wdt_disable(wdt);

Could this and other tegra186_wdt_enable/disable occurrences race with
the interrupt handler?

Shouldn't IRQ be disabled/enable in a such cases to avoid the races?

> +	wdt->base.timeout = timeout;
> +
> +	if (watchdog_active(&wdt->base))
> +		tegra186_wdt_enable(wdt);
> +
> +	return 0;
> +}