linux-kernel - [PATCH 3.12 034/146] hwmon: (emc1403) fix inverted store

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Message-Id: <f77cb78f4fd2951fa29bf80939ec41b3b21f9e06.1402303820.git.jslaby@suse.cz>
Date:	Mon,  9 Jun 2014 10:49:29 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Josef Gajdusek <atx@....name>,
	Guenter Roeck <linux@...ck-us.net>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 034/146] hwmon: (emc1403) fix inverted store_hyst()

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

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

===============

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: Jiri Slaby <jslaby@...e.cz>
---
 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;
-- 
1.9.3

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