iio: adc: stm32: fix bad error check on max_channels

commit 4fb840c upstream. Fix a bad error check when counting 'st,adc-channels' array elements. This is seen when all channels are in use simultaneously. Fixes: 64ad7f6 ("iio: adc: stm32: introduce compatible data cfg") Signed-off-by: Fabrice Gasnier <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
openbmc · Oct 12, 2017 · ff24f48 · ff24f48
1 parent df1ff9f
commit ff24f48
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
@@ -1543,7 +1543,7 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev)
 
 	num_channels = of_property_count_u32_elems(node, "st,adc-channels");
 	if (num_channels < 0 ||
-	    num_channels >= adc_info->max_channels) {
+	    num_channels > adc_info->max_channels) {
 		dev_err(&indio_dev->dev, "Bad st,adc-channels?\n");
 		return num_channels < 0 ? num_channels : -EINVAL;
 	}