From: Jacopo Mondi jacopo+renesas@jmondi.org
[ Upstream commit b9ddd5091160793ee9fac10da765cf3f53d2aaf0 ]
The max9611 driver reads the die temperature at probe time to validate the communication channel. Use the actual read value to perform the test instead of the read function return value, which was mistakenly used so far.
The temperature reading test was only successful because the 0 return value is in the range of supported temperatures.
Fixes: 69780a3bbc0b ("iio: adc: Add Maxim max9611 ADC driver") Signed-off-by: Jacopo Mondi jacopo+renesas@jmondi.org Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/adc/max9611.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/adc/max9611.c b/drivers/iio/adc/max9611.c index 0e3c6529fc4c9..da073d72f649f 100644 --- a/drivers/iio/adc/max9611.c +++ b/drivers/iio/adc/max9611.c @@ -480,7 +480,7 @@ static int max9611_init(struct max9611_dev *max9611) if (ret) return ret;
- regval = ret & MAX9611_TEMP_MASK; + regval &= MAX9611_TEMP_MASK;
if ((regval > MAX9611_TEMP_MAX_POS && regval < MAX9611_TEMP_MIN_NEG) ||