linux-kernel - RE: [PATCH next] drm/bridge: ite-it6263: Prevent error pointer dereference in probe()

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Message-ID:
 <TY3PR01MB1134646424EE505AA5525AE8C86592@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Date: Tue, 12 Nov 2024 10:24:58 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Dan Carpenter <dan.carpenter@...aro.org>, Liu Ying <victor.liu@....com>
CC: Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong
	<neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, laurent.pinchart
	<laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, Jernej
 Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>, Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>, "dri-devel@...ts.freedesktop.org"
	<dri-devel@...ts.freedesktop.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "kernel-janitors@...r.kernel.org"
	<kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH next] drm/bridge: ite-it6263: Prevent error pointer
 dereference in probe()

Hi Dan Carpenter,

Thanks for the patch.

> -----Original Message-----
> From: Dan Carpenter <dan.carpenter@...aro.org>
> Sent: 12 November 2024 10:23
> Subject: [PATCH next] drm/bridge: ite-it6263: Prevent error pointer dereference in probe()
> 
> If devm_i2c_new_dummy_device() fails then we were supposed to return an error code, but instead the
> function continues and will crash on the next line.  Add the missing return statement.
> 
> Fixes: 049723628716 ("drm/bridge: Add ITE IT6263 LVDS to HDMI converter")
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>

Reviewed-by: Biju Das <biju.das.jz@...renesas.com>

Cheers,
Biju

> ---
>  drivers/gpu/drm/bridge/ite-it6263.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ite-it6263.c b/drivers/gpu/drm/bridge/ite-it6263.c
> index cbabd4e20d3e..5f138a5692c7 100644
> --- a/drivers/gpu/drm/bridge/ite-it6263.c
> +++ b/drivers/gpu/drm/bridge/ite-it6263.c
> @@ -845,8 +845,8 @@ static int it6263_probe(struct i2c_client *client)
>  	it->lvds_i2c = devm_i2c_new_dummy_device(dev, client->adapter,
>  						 LVDS_INPUT_CTRL_I2C_ADDR);
>  	if (IS_ERR(it->lvds_i2c))
> -		dev_err_probe(it->dev, PTR_ERR(it->lvds_i2c),
> -			      "failed to allocate I2C device for LVDS\n");
> +		return dev_err_probe(it->dev, PTR_ERR(it->lvds_i2c),
> +				     "failed to allocate I2C device for LVDS\n");
> 
>  	it->lvds_regmap = devm_regmap_init_i2c(it->lvds_i2c,
>  					       &it6263_lvds_regmap_config);
> --
> 2.45.2