linux-kernel - [PATCH 3.2 65/92] hwmon: (emc1403) fix inverted store

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Message-ID: <lsq.1402104389.213583915@decadent.org.uk>
Date:	Sat, 07 Jun 2014 02:26:29 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Guenter Roeck" <linux@...ck-us.net>,
	"Josef Gajdusek" <atx@....name>, "Jean Delvare" <jdelvare@...e.de>
Subject: [PATCH 3.2 65/92] hwmon: (emc1403) fix inverted store_hyst()

3.2.60-rc1 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: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/hwmon/emc1403.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwmon/emc1403.c
+++ b/drivers/hwmon/emc1403.c
@@ -159,7 +159,7 @@ static ssize_t store_hyst(struct device
 	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;

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