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Date:   Thu, 10 Jan 2019 07:59:29 +0100
From:   Maxime Ripard <>
To:     Chen-Yu Tsai <>
Cc:     Daniel Lezcano <>,
        Thomas Gleixner <>,,
Subject: Re: [PATCH] clocksource: sun5i: fail gracefully when clock rate is

On Thu, Jan 10, 2019 at 02:22:07PM +0800, Chen-Yu Tsai wrote:
> If the clock tree is not fully populated when the timer-sun5i init code
> is called, attempts to get the clock rate for the timer would fail and
> return 0.
> Make the init code for both clock events and clocksource check the
> returned clock rate and fail gracefully if the result is 0, instead of
> causing a divide by 0 exception later on.
> Fixes: 4a59058f0b09 ("clocksource/drivers/sun5i: Refactor the current code")
> Signed-off-by: Chen-Yu Tsai <>

Acked-by: Maxime Ripard <>


Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering

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