linux-kernel - Re: [PATCH] Staging: android: timed_gpio.c: remove else statement after return

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Date:	Mon, 28 Jul 2014 22:02:23 -0700
From:	Joe Perches <joe@...ches.com>
To:	Murilo Opsfelder Araujo <mopsfelder@...il.com>
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	gregkh@...uxfoundation.org
Subject: Re: [PATCH] Staging: android: timed_gpio.c: remove else statement
 after return

On Mon, 2014-07-28 at 20:11 -0300, Murilo Opsfelder Araujo wrote:
> This patch makes checkpatch.pl script happy by fixing the following
> warning:
> 
> WARNING: else is not generally useful after a break or return
> 
> Signed-off-by: Murilo Opsfelder Araujo <mopsfelder@...il.com>
> ---
>  drivers/staging/android/timed_gpio.c |    5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/android/timed_gpio.c b/drivers/staging/android/timed_gpio.c
> index 180c209..05cb578 100644
> --- a/drivers/staging/android/timed_gpio.c
> +++ b/drivers/staging/android/timed_gpio.c
> @@ -53,8 +53,9 @@ static int gpio_get_time(struct timed_output_dev *dev)
>  		struct timeval t = ktime_to_timeval(r);
>  
>  		return t.tv_sec * 1000 + t.tv_usec / 1000;
> -	} else
> -		return 0;
> +	}
> +
> +	return 0;
>  }

It may be better to reverse the logic here.
Something like:

 drivers/staging/android/timed_gpio.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/android/timed_gpio.c b/drivers/staging/android/timed_gpio.c
index 180c209..8fa4758 100644
--- a/drivers/staging/android/timed_gpio.c
+++ b/drivers/staging/android/timed_gpio.c
@@ -45,16 +45,17 @@ static enum hrtimer_restart gpio_timer_func(struct hrtimer *timer)
 
 static int gpio_get_time(struct timed_output_dev *dev)
 {
-	struct timed_gpio_data	*data =
-		container_of(dev, struct timed_gpio_data, dev);
+	struct timed_gpio_data *data;
+	struct timeval t;
 
-	if (hrtimer_active(&data->timer)) {
-		ktime_t r = hrtimer_get_remaining(&data->timer);
-		struct timeval t = ktime_to_timeval(r);
+	data = container_of(dev, struct timed_gpio_data, dev);
 
-		return t.tv_sec * 1000 + t.tv_usec / 1000;
-	} else
+	if (!hrtimer_active(&data->timer))
 		return 0;
+
+	t = ktime_to_timeval(hrtimer_get_remaining(&data->timer));
+
+	return t.tv_sec * 1000 + t.tv_usec / 1000;
 }
 
 static void gpio_enable(struct timed_output_dev *dev, int value)



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