linux-kernel - [PATCH 1/2] iio: st_sensors: Make use of the helper function dev_err

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Message-ID: <20210927084137.1081-1-caihuoqing@baidu.com>
Date:   Mon, 27 Sep 2021 16:41:35 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <caihuoqing@...du.com>
CC:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] iio: st_sensors: Make use of the helper function dev_err_probe()

When possible use dev_err_probe help to properly deal with the
PROBE_DEFER error, the benefit is that DEFER issue will be logged
in the devices_deferred debugfs file.
Using dev_err_probe() can reduce code size, and the error value
gets printed.

Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
---
 .../iio/common/st_sensors/st_sensors_core.c    | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
index a5a140de9a23..732d0f8f99f6 100644
--- a/drivers/iio/common/st_sensors/st_sensors_core.c
+++ b/drivers/iio/common/st_sensors/st_sensors_core.c
@@ -228,10 +228,11 @@ int st_sensors_power_enable(struct iio_dev *indio_dev)
 
 	/* Regulators not mandatory, but if requested we should enable them. */
 	pdata->vdd = devm_regulator_get(parent, "vdd");
-	if (IS_ERR(pdata->vdd)) {
-		dev_err(&indio_dev->dev, "unable to get Vdd supply\n");
-		return PTR_ERR(pdata->vdd);
-	}
+	if (IS_ERR(pdata->vdd))
+		return dev_err_probe(&indio_dev->dev,
+				     PTR_ERR(pdata->vdd),
+				     "unable to get Vdd supply\n");
+
 	err = regulator_enable(pdata->vdd);
 	if (err != 0) {
 		dev_warn(&indio_dev->dev,
@@ -244,10 +245,11 @@ int st_sensors_power_enable(struct iio_dev *indio_dev)
 		return err;
 
 	pdata->vdd_io = devm_regulator_get(parent, "vddio");
-	if (IS_ERR(pdata->vdd_io)) {
-		dev_err(&indio_dev->dev, "unable to get Vdd_IO supply\n");
-		return PTR_ERR(pdata->vdd_io);
-	}
+	if (IS_ERR(pdata->vdd_io))
+		return dev_err_probe(&indio_dev->dev,
+				     PTR_ERR(pdata->vdd_io),
+				     "unable to get Vdd_IO supply\n");
+
 	err = regulator_enable(pdata->vdd_io);
 	if (err != 0) {
 		dev_warn(&indio_dev->dev,
-- 
2.25.1