iio: adc: ad4000: Check for error code from devm_mutex_init() call

Even if it's not critical, the avoidance of checking the error code
from devm_mutex_init() call today diminishes the point of using devm
variant of it. Tomorrow it may even leak something. Add the missed
check.

Fixes: 938fd562b974 ("iio: adc: Add support for AD4000")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20241030162013.2100253-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad4000.c b/drivers/iio/adc/ad4000.c
index 6ea49124508499b37c3536cbf6ae3e200a1f4138..b4a23c97ee5231059c9025e294524b75d858ddff 100644 (file)
--- a/drivers/iio/adc/ad4000.c
+++ b/drivers/iio/adc/ad4000.c
@@ -637,7 +637,9 @@ static int ad4000_probe(struct spi_device *spi)
        indio_dev->name = chip->dev_name;
        indio_dev->num_channels = 1;
 
-       devm_mutex_init(dev, &st->lock);
+       ret = devm_mutex_init(dev, &st->lock);
+       if (ret)
+               return ret;
 
        st->gain_milli = 1000;
        if (chip->has_hardware_gain) {