linux-kernel - [PATCH 3.11 069/138] hwmon: (emc1403) fix inverted store

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Message-Id: <1401795584-22664-70-git-send-email-luis.henriques@canonical.com>
Date:	Tue,  3 Jun 2014 12:38:35 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Josef Gajdusek <atx@....name>, Guenter Roeck <linux@...ck-us.net>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 069/138] hwmon: (emc1403) fix inverted store_hyst()

3.11.10.11 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Josef Gajdusek <atx@....name>

commit 17c048fc4bd95efea208a1920f169547d8588f1f upstream.

Attempts to set the hysteresis value to a temperature below the target
limit fails with "write error: Numerical result out of range" due to
an inverted comparison.

Signed-off-by: Josef Gajdusek <atx@....name>
Reviewed-by: Jean Delvare <jdelvare@...e.de>
[Guenter Roeck: Updated headline and description]
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/hwmon/emc1403.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/emc1403.c b/drivers/hwmon/emc1403.c
index 142e1cb8dea7..62fba71ef3c5 100644
--- a/drivers/hwmon/emc1403.c
+++ b/drivers/hwmon/emc1403.c
@@ -162,7 +162,7 @@ static ssize_t store_hyst(struct device *dev,
 	if (retval < 0)
 		goto fail;
 
-	hyst = val - retval * 1000;
+	hyst = retval * 1000 - val;
 	hyst = DIV_ROUND_CLOSEST(hyst, 1000);
 	if (hyst < 0 || hyst > 255) {
 		retval = -ERANGE;
-- 
1.9.1

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