linux-kernel - [PATCH v2] iio: adc: stm32-adc: Fix of_node

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Message-Id: <20211021121826.6339-1-wanjiabing@vivo.com>
Date:   Thu, 21 Oct 2021 08:18:23 -0400
From:   Wan Jiabing <wanjiabing@...o.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
        Olivier Moysan <olivier.moysan@...s.st.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Xu Wang <vulab@...as.ac.cn>,
        Ahmad Fatoum <a.fatoum@...gutronix.de>,
        Wan Jiabing <wanjiabing@...o.com>, linux-iio@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     kael_w@...h.net
Subject: [PATCH v2] iio: adc: stm32-adc: Fix of_node_put() issue in stm32-adc

Fix following coccicheck warning:
./drivers/iio/adc/stm32-adc.c:2014:1-33: WARNING: Function
for_each_available_child_of_node should have of_node_put() before return.

Early exits from for_each_available_child_of_node should decrement the
node reference counter. Repalce return by goto here.

Reviewed-by: Fabrice Gasnier <fabrice.gasnier@...s.st.com>
Signed-off-by: Wan Jiabing <wanjiabing@...o.com>
---
Changelog:
v2:
- Fix typo and add reviewed-by.
---
 drivers/iio/adc/stm32-adc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 6245434f8377..7f1fb36c747c 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -2024,7 +2024,8 @@ static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev,
 			if (strlen(name) >= STM32_ADC_CH_SZ) {
 				dev_err(&indio_dev->dev, "Label %s exceeds %d characters\n",
 					name, STM32_ADC_CH_SZ);
-				return -EINVAL;
+				ret = -EINVAL;
+				goto err;
 			}
 			strncpy(adc->chan_name[val], name, STM32_ADC_CH_SZ);
 			ret = stm32_adc_populate_int_ch(indio_dev, name, val);
-- 
2.20.1