linux-kernel - Re: [PATCH] bq2415x_charger: Use common error handling code in bq2415x_timer

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Date:   Thu, 9 Nov 2017 13:08:42 +0100
From:   Pavel Machek <pavel@....cz>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-pm@...r.kernel.org, Pali Roh?r <pali.rohar@...il.com>,
        Sebastian Reichel <sre@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] bq2415x_charger: Use common error handling code in
 bq2415x_timer_work()

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Mon, 30 Oct 2017 21:45:09 +0100
> 
> Add a jump target so that a bit of exception handling can be better reused
> at the end of this function.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>

Better fix would be to display separate messages; user is probably
interested in what failed...
								Pavel

> ---
>  drivers/power/supply/bq2415x_charger.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/power/supply/bq2415x_charger.c b/drivers/power/supply/bq2415x_charger.c
> index c4770a94cc8e..8385e02e1634 100644
> --- a/drivers/power/supply/bq2415x_charger.c
> +++ b/drivers/power/supply/bq2415x_charger.c
> @@ -914,16 +914,12 @@ static void bq2415x_timer_work(struct work_struct *work)
>  	}
>  
>  	boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
> -	if (boost < 0) {
> -		bq2415x_timer_error(bq, "Unknown error");
> -		return;
> -	}
> +	if (boost < 0)
> +		goto report_timer_error;
>  
>  	error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
> -	if (error < 0) {
> -		bq2415x_timer_error(bq, "Unknown error");
> -		return;
> -	}
> +	if (error < 0)
> +		goto report_timer_error;
>  
>  	if (boost) {
>  		switch (error) {
> @@ -992,6 +988,10 @@ static void bq2415x_timer_work(struct work_struct *work)
>  	}
>  
>  	schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
> +	return;
> +
> +report_timer_error:
> +	bq2415x_timer_error(bq, "Unknown error");
>  }
>  
>  /**** power supply interface code ****/

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html