iio: adc: ad7793: Add missing error code in ad7793_setup()

Set error code while device ID query failed.

Fixes: 88bc30548aae ("IIO: ADC: New driver for AD7792/AD7793 3 Channel SPI ADC")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index 5e980a06258e64753b8f0b8320c75bb4c847e92c..440ef4c7be074c1c4b9f1d680147fd47703dd944 100644 (file)
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -279,6 +279,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
        id &= AD7793_ID_MASK;
 
        if (id != st->chip_info->id) {
+               ret = -ENODEV;
                dev_err(&st->sd.spi->dev, "device ID query failed\n");
                goto out;
        }