[PATCH v2] iio: adc: stm32-adc: Fix of_node_put() issue in stm32-adc

[Wan Jiabing]

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 at foss.st.com>
Signed-off-by: Wan Jiabing <wanjiabing at vivo.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