From b6eb572f385fc4676d8575c29396991b6f9b60f5 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sat, 30 Mar 2024 18:53:00 +0000
Subject: [PATCH] iio: adc: stm32: Fixing err code to not indicate success

[ Upstream commit 3735ca0b072656c3aa2cedc617a5e639b583a472 ]

This path would result in returning 0 / success on an error path.

Cc: Olivier Moysan <olivier.moysan@foss.st.com>
Fixes: 95bc818404b2 ("iio: adc: stm32-adc: add support of generic channels binding")
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20240330185305.1319844-4-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iio/adc/stm32-adc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index a5d5b7b3823b..6fede34091cc 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -2079,6 +2079,7 @@ static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev,
 			if (vin[0] != val || vin[1] >= adc_info->max_channels) {
 				dev_err(&indio_dev->dev, "Invalid channel in%d-in%d\n",
 					vin[0], vin[1]);
+				ret = -EINVAL;
 				goto err;
 			}
 		} else if (ret != -EINVAL) {