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Commit 367d103a authored by Jacopo Mondi's avatar Jacopo Mondi Committed by Greg Kroah-Hartman
Browse files

iio: adc: max9611: Fix temperature reading in probe 



commit b9ddd5091160793ee9fac10da765cf3f53d2aaf0 upstream.

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: 69780a3b ("iio: adc: Add Maxim max9611 ADC driver")
Signed-off-by: default avatarJacopo Mondi <jacopo+renesas@jmondi.org>
Cc: <Stable@vger.kernel.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent dac96992

drivers/iio/adc/max9611.c

+1 −1
Original line number Diff line number Diff line
@@ -483,7 +483,7 @@ 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) ||