linux-kernel - [PATCH v5 3/5] iio:temperature:mlx90632: Convert polling while loop to do-while

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Date:   Thu, 13 Aug 2020 09:51:23 +0200
From:   Crt Mori <cmo@...exis.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Crt Mori <cmo@...exis.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v5 3/5] iio:temperature:mlx90632: Convert polling while loop to do-while

Reduce number of lines and improve readability to convert polling while
loops to do-while. The iopoll.h interface was not used, because we
require more than 20ms timeout, because time for sensor to perform a
measurement is around 10ms and it needs to perform measurements for each
channel (which currently is 3).

Signed-off-by: Crt Mori <cmo@...exis.com>
---
 drivers/iio/temperature/mlx90632.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index ce75f5a3486b..d87c792b7e72 100644
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -188,15 +188,13 @@ static int mlx90632_perform_measurement(struct mlx90632_data *data)
 	if (ret < 0)
 		return ret;
 
-	while (tries-- > 0) {
+	do {
 		ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
 				  &reg_status);
 		if (ret < 0)
 			return ret;
-		if (reg_status & MLX90632_STAT_DATA_RDY)
-			break;
 		usleep_range(10000, 11000);
-	}
+	} while (!(reg_status & MLX90632_STAT_DATA_RDY) && tries--);
 
 	if (tries < 0) {
 		dev_err(&data->client->dev, "data not ready");
-- 
2.25.1