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

commit 4ed243b1da169bcbc1ec5507867e56250c5f1ff9 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index 6ed6d1410201674c922a57a67adef45d069d846f..947d6c7772344bde722832d817fc9a06701ba7e5 100644 (file)
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -278,6 +278,7 @@ 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;
        }