linux-kernel - [PATCH] iio/adc/palmas: Use common error handling code in palmas_gpadc

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Date:   Thu, 26 Oct 2017 08:08:49 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-iio@...r.kernel.org, Alison Schofield <amsfield22@...il.com>,
        "H. Nikolaus Schaller" <hns@...delico.com>,
        Hartmut Knaack <knaack.h@....de>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] iio/adc/palmas: Use common error handling code in
 palmas_gpadc_calibrate()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 26 Oct 2017 07:58:03 +0200

* Add a jump target so that a specific error message is stored only once
  at the end of this function implementation.

* Adjust condition checks.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/iio/adc/palmas_gpadc.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
index 69b9affeef1e..5e6566692d46 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -304,17 +304,13 @@ static int palmas_gpadc_calibrate(struct palmas_gpadc *adc, int adc_chan)
 
 	ret = palmas_read(adc->palmas, PALMAS_TRIM_GPADC_BASE,
 				adc->adc_info[adc_chan].trim1_reg, &d1);
-	if (ret < 0) {
-		dev_err(adc->dev, "TRIM read failed: %d\n", ret);
-		goto scrub;
-	}
+	if (ret)
+		goto report_failure;
 
 	ret = palmas_read(adc->palmas, PALMAS_TRIM_GPADC_BASE,
 				adc->adc_info[adc_chan].trim2_reg, &d2);
-	if (ret < 0) {
-		dev_err(adc->dev, "TRIM read failed: %d\n", ret);
-		goto scrub;
-	}
+	if (ret)
+		goto report_failure;
 
 	/* gain error calculation */
 	k = (1000 + (1000 * (d2 - d1)) / (x2 - x1));
@@ -329,6 +325,10 @@ static int palmas_gpadc_calibrate(struct palmas_gpadc *adc, int adc_chan)
 
 scrub:
 	return ret;
+
+report_failure:
+	dev_err(adc->dev, "TRIM read failed: %d\n", ret);
+	goto scrub;
 }
 
 static int palmas_gpadc_start_conversion(struct palmas_gpadc *adc, int adc_chan)
-- 
2.14.3