linux-kernel - Re: [PATCH] drm: sun4i: fix probe error handling

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Message-ID: <20160508180550.GB6167@lukather>
Date:	Sun, 8 May 2016 20:05:50 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: sun4i: fix probe error handling

On Thu, May 05, 2016 at 10:10:52PM +0200, Arnd Bergmann wrote:
> gcc points out a possible uninitialized variable use in
> sun4i_dclk_create():
> 
> drivers/gpu/drm/sun4i/sun4i_dotclock.c: In function 'sun4i_dclk_create':
> drivers/gpu/drm/sun4i/sun4i_dotclock.c:139:12: error: 'clk_name' may be used uninitialized in this function [-Werror=maybe-uninitialized]
>   init.name = clk_name;
> 
> The warning only shows up when CONFIG_OF is disabled, and the
> property is never filled, but the same bug can show up even
> when CONFIG_OF is enabled but of_property_read_string_index
> returns another error.
> 
> To fix it, this ensures that sun4i_dclk_create propagates
> any error from of_property_read_string_index.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 9026e0d122ac ("drm: Add Allwinner A10 Display Engine support")

Applied, thanks

Maxime

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

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