linux-kernel - [PATCH 2/6] iio: adc: ad7280a: simplify with cleanup.h

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Message-Id: <20240705-cleanup-h-iio-v1-2-77114c7e84c5@linaro.org>
Date: Fri, 05 Jul 2024 12:40:45 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Dan Robertson <dan@...obertson.com>, 
 Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Nicolas Ferre <nicolas.ferre@...rochip.com>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Claudiu Beznea <claudiu.beznea@...on.dev>, 
 Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH 2/6] iio: adc: ad7280a: simplify with cleanup.h

Allocate the memory with scoped/cleanup.h to reduce error handling and
make the code a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/iio/adc/ad7280a.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/adc/ad7280a.c b/drivers/iio/adc/ad7280a.c
index d4a4e15c8244..7bfa090da4df 100644
--- a/drivers/iio/adc/ad7280a.c
+++ b/drivers/iio/adc/ad7280a.c
@@ -7,6 +7,7 @@
 
 #include <linux/bitfield.h>
 #include <linux/bits.h>
+#include <linux/cleanup.h>
 #include <linux/crc8.h>
 #include <linux/delay.h>
 #include <linux/device.h>
@@ -803,16 +804,16 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
 	struct ad7280_state *st = iio_priv(indio_dev);
-	unsigned int *channels;
 	int i, ret;
 
-	channels = kcalloc(st->scan_cnt, sizeof(*channels), GFP_KERNEL);
+	unsigned int *channels __free(kfree) = kcalloc(st->scan_cnt, sizeof(*channels),
+						       GFP_KERNEL);
 	if (!channels)
 		return IRQ_HANDLED;
 
 	ret = ad7280_read_all_channels(st, st->scan_cnt, channels);
 	if (ret < 0)
-		goto out;
+		return IRQ_HANDLED;
 
 	for (i = 0; i < st->scan_cnt; i++) {
 		unsigned int val;
@@ -852,9 +853,6 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 		}
 	}
 
-out:
-	kfree(channels);
-
 	return IRQ_HANDLED;
 }
 

-- 
2.43.0