linux-kernel - [PATCH AUTOSEL 5.2 20/44] iio: adc: max9611: Fix temperature reading in probe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190820134028.10829-20-sashal@kernel.org>
Date:   Tue, 20 Aug 2019 09:40:04 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jacopo Mondi <jacopo+renesas@...ndi.org>, Stable@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Sasha Levin <sashal@...nel.org>, linux-iio@...r.kernel.org
Subject: [PATCH AUTOSEL 5.2 20/44] iio: adc: max9611: Fix temperature reading in probe

From: Jacopo Mondi <jacopo+renesas@...ndi.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@...ndi.org>
Cc: <Stable@...r.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Sasha Levin <sashal@...nel.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) ||
-- 
2.20.1