From: Daniel Thompson <daniel.thompson@linaro.org>
To: Flavio Suligoi <f.suligoi@asem.it>
Cc: Lee Jones <lee@kernel.org>, Jingoo Han <jingoohan1@gmail.com>,
Helge Deller <deller@gmx.de>,
Dan Carpenter <dan.carpenter@linaro.org>,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] backlight: mp3309c: fix uninitialized local variable
Date: Wed, 29 Nov 2023 11:53:02 -0500 [thread overview]
Message-ID: <20231129165302.GA18064@aspen.lan> (raw)
In-Reply-To: <20231129164514.2772719-1-f.suligoi@asem.it>
On Wed, Nov 29, 2023 at 05:45:14PM +0100, Flavio Suligoi wrote:
> In the function "pm3309c_parse_dt_node", when the dimming analog control
> mode (by I2C messages) is enabled, the local variable "prop_levels" is
> tested without any initialization, as indicated by the following smatch
> warning:
>
> drivers/video/backlight/mp3309c.c:279 pm3309c_parse_dt_node() error: uninitialized symbol 'prop_levels'.
>
> To avoid any problem in case of undefined behavior, we need to initialize
> it to "NULL".
>
> Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
> Closes: https://lore.kernel.org/dri-devel/af0a1870-693b-442f-9b11-0503cfcd944a@moroto.mountain/
> Fixes: 2e914516a58c ("backlight: mp3309c: Add support for MPS MP3309C")
> Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Daniel.
WARNING: multiple messages have this Message-ID (diff)
From: Daniel Thompson <daniel.thompson@linaro.org>
To: Flavio Suligoi <f.suligoi@asem.it>
Cc: linux-fbdev@vger.kernel.org, Jingoo Han <jingoohan1@gmail.com>,
Helge Deller <deller@gmx.de>, Lee Jones <lee@kernel.org>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
Dan Carpenter <dan.carpenter@linaro.org>
Subject: Re: [PATCH v2] backlight: mp3309c: fix uninitialized local variable
Date: Wed, 29 Nov 2023 11:53:02 -0500 [thread overview]
Message-ID: <20231129165302.GA18064@aspen.lan> (raw)
In-Reply-To: <20231129164514.2772719-1-f.suligoi@asem.it>
On Wed, Nov 29, 2023 at 05:45:14PM +0100, Flavio Suligoi wrote:
> In the function "pm3309c_parse_dt_node", when the dimming analog control
> mode (by I2C messages) is enabled, the local variable "prop_levels" is
> tested without any initialization, as indicated by the following smatch
> warning:
>
> drivers/video/backlight/mp3309c.c:279 pm3309c_parse_dt_node() error: uninitialized symbol 'prop_levels'.
>
> To avoid any problem in case of undefined behavior, we need to initialize
> it to "NULL".
>
> Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
> Closes: https://lore.kernel.org/dri-devel/af0a1870-693b-442f-9b11-0503cfcd944a@moroto.mountain/
> Fixes: 2e914516a58c ("backlight: mp3309c: Add support for MPS MP3309C")
> Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Daniel.
next prev parent reply other threads:[~2023-11-29 16:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-29 16:45 [PATCH v2] backlight: mp3309c: fix uninitialized local variable Flavio Suligoi
2023-11-29 16:45 ` Flavio Suligoi
2023-11-29 16:53 ` Daniel Thompson [this message]
2023-11-29 16:53 ` Daniel Thompson
2023-12-01 11:24 ` (subset) " Lee Jones
2023-12-01 11:24 ` Lee Jones
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