linux-kernel - Re: [PATCH 05/16] media: i2c: rdacm20: Check return values

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Message-ID: <YDMERvqtWulct59d@pendragon.ideasonboard.com>
Date:   Mon, 22 Feb 2021 03:09:26 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Jacopo Mondi <jacopo+renesas@...ndi.org>
Cc:     kieran.bingham+renesas@...asonboard.com,
        niklas.soderlund+renesas@...natech.se, geert@...ux-m68k.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 05/16] media: i2c: rdacm20: Check return values

Hi Jacopo,

Thank you for the patch.

On Tue, Feb 16, 2021 at 06:41:35PM +0100, Jacopo Mondi wrote:
> The camera module initialization routine does not check the return
> value of a few functions. Fix that.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>
> ---
>  drivers/media/i2c/rdacm20.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/media/i2c/rdacm20.c b/drivers/media/i2c/rdacm20.c
> index 56406d82b5ac..e982373908f2 100644
> --- a/drivers/media/i2c/rdacm20.c
> +++ b/drivers/media/i2c/rdacm20.c
> @@ -470,11 +470,16 @@ static int rdacm20_initialize(struct rdacm20_device *dev)
>  	 *  Ensure that we have a good link configuration before attempting to
>  	 *  identify the device.
>  	 */
> -	max9271_configure_i2c(&dev->serializer, MAX9271_I2CSLVSH_469NS_234NS |
> -						MAX9271_I2CSLVTO_1024US |
> -						MAX9271_I2CMSTBT_105KBPS);
> +	ret = max9271_configure_i2c(&dev->serializer,
> +				    MAX9271_I2CSLVSH_469NS_234NS |
> +				    MAX9271_I2CSLVTO_1024US |
> +				    MAX9271_I2CMSTBT_105KBPS);
> +	if (ret)
> +		return ret;
>  
> -	max9271_configure_gmsl_link(&dev->serializer);
> +	ret = max9271_configure_gmsl_link(&dev->serializer);
> +	if (ret)
> +		return ret;

This looks good, so

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

But it would be more useful if max9271_configure_gmsl_link() returned
errors when I2C writes fail :-)

>  
>  	ret = max9271_verify_id(&dev->serializer);
>  	if (ret < 0)

-- 
Regards,

Laurent Pinchart