linux-kernel - Re: [PATCH] i2c: mv64xxx: continue probe when clock-frequency is missing

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Message-ID: <20140825161033.GF15297@lukather>
Date:	Mon, 25 Aug 2014 18:10:34 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Wolfram Sang <wsa@...-dreams.de>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, stable@...r.kernel.org
Subject: Re: [PATCH] i2c: mv64xxx: continue probe when clock-frequency is
 missing

On Mon, Aug 25, 2014 at 11:50:19PM +0800, Chen-Yu Tsai wrote:
> The "clock-frequency" DT property is listed as optional, However,
> the current code stores the return value of of_property_read_u32 in
> the return code of mv64xxx_of_config, but then forgets to clear it
> after setting the default value of "clock-frequency". It is then
> passed out to the main probe function, resulting in a probe failure
> when "clock-frequency" is missing.
> 
> This patch checks and then throws away the result of
> of_property_read_u32, instead of storing it and having to clear it
> afterwards.
> 
> This issue was discovered after the property was removed from all
> sunxi DTs.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> Cc: stable@...r.kernel.org

Good catch!

Acked-by: Maxime Ripard <maxime.ripard@...e-electrons.com>

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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