linux-kernel - Re: [PATCH v6 1/3] backlight: lm3630a: return 0 on success in update

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 2 May 2019 11:07:51 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Brian Masney <masneyb@...tation.org>, lee.jones@...aro.org,
        jingoohan1@...il.com, robh+dt@...nel.org
Cc:     jacek.anaszewski@...il.com, pavel@....cz, mark.rutland@....com,
        b.zolnierkie@...sung.com, dri-devel@...ts.freedesktop.org,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
        dmurphy@...com, jonathan@...ek.ca,
        Daniel Thompson <daniel@...felineninja.org.uk>
Subject: Re: [PATCH v6 1/3] backlight: lm3630a: return 0 on success in
 update_status functions

On 24/04/2019 10:25, Brian Masney wrote:
> lm3630a_bank_a_update_status() and lm3630a_bank_b_update_status()
> both return the brightness value if the brightness was successfully
> updated. Writing to these attributes via sysfs would cause a 'Bad
> address' error to be returned. These functions should return 0 on
> success, so let's change it to correct that error.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
> Fixes: 28e64a68a2ef ("backlight: lm3630: apply chip revision")
> Acked-by: Pavel Machek <pavel@....cz>

Hi Brian, sorry for the delay. For some reason your mails are being 
dumped before they reach me so I only discovered these patches when I 
paid proper attention to the replies and fetched them from patchwork.

Hi Lee, is the same thing happening for you? ;-)

Acked-by: Daniel Thompson <daniel.thompson@...aro.org>


> ---
> No changes since v2 when this patch was originally introduced.
> 
>   drivers/video/backlight/lm3630a_bl.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c
> index 2030a6b77a09..ef2553f452ca 100644
> --- a/drivers/video/backlight/lm3630a_bl.c
> +++ b/drivers/video/backlight/lm3630a_bl.c
> @@ -201,7 +201,7 @@ static int lm3630a_bank_a_update_status(struct backlight_device *bl)
>   				      LM3630A_LEDA_ENABLE, LM3630A_LEDA_ENABLE);
>   	if (ret < 0)
>   		goto out_i2c_err;
> -	return bl->props.brightness;
> +	return 0;
>   
>   out_i2c_err:
>   	dev_err(pchip->dev, "i2c failed to access\n");
> @@ -278,7 +278,7 @@ static int lm3630a_bank_b_update_status(struct backlight_device *bl)
>   				      LM3630A_LEDB_ENABLE, LM3630A_LEDB_ENABLE);
>   	if (ret < 0)
>   		goto out_i2c_err;
> -	return bl->props.brightness;
> +	return 0;
>   
>   out_i2c_err:
>   	dev_err(pchip->dev, "i2c failed to access REG_CTRL\n");
>