[PATCH] iio: dac: Fix passing uninitialized vref1_uV for no Vref1 case

[Ariana Lazar <ariana.lazar@microchip.com>]

Initialize vref1_uV variable to 0 before calling
mcp47feb02_init_ch_scales() in mcp47feb02_probe() to avoid passing an
uninitialized value when have_ext_vref1 is false.

Fixes: dd154646d292 ("iio: dac: mcp47feb02: Fix Vref validation [1-999] case")
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/all/adiPnla0M5EzvgD-@stanley.mountain/
Signed-off-by: Ariana Lazar <ariana.lazar@microchip.com>
---
 drivers/iio/dac/mcp47feb02.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/dac/mcp47feb02.c b/drivers/iio/dac/mcp47feb02.c
index faccb804a5ed548088aaf83266b16ed45a92916c..efd4847913e46a4fa1b671aa9c5bd3e1430406b7 100644
--- a/drivers/iio/dac/mcp47feb02.c
+++ b/drivers/iio/dac/mcp47feb02.c
@@ -1095,9 +1095,10 @@ static int mcp47feb02_probe(struct i2c_client *client)
 {
 	const struct mcp47feb02_features *chip_features;
 	struct device *dev = &client->dev;
+	int vdd_uV, vref_uV, vref1_uV;
 	struct mcp47feb02_data *data;
 	struct iio_dev *indio_dev;
-	int vref1_uV, vref_uV, vdd_uV, ret;
+	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)
@@ -1146,13 +1147,13 @@ static int mcp47feb02_probe(struct i2c_client *client)
 		dev_dbg(dev, "Vref is unavailable.\n");
 	}
 
+	vref1_uV = 0;
 	if (chip_features->have_ext_vref1) {
 		ret = devm_regulator_get_enable_read_voltage(dev, "vref1");
 		if (ret > 0) {
 			vref1_uV = ret;
 			data->use_vref1 = true;
 		} else {
-			vref1_uV = 0;
 			dev_dbg(dev, "using internal band gap as voltage reference 1.\n");
 			dev_dbg(dev, "Vref1 is unavailable.\n");
 		}

---
base-commit: 51e7665ab81f02adc80a1219c260ee678e9c6eb8
change-id: 20260414-mcp47feb02-fix4-614de9334f22

Best regards,
-- 
Ariana Lazar <ariana.lazar@microchip.com>