[3.11.y.z extended stable] Patch "hwmon: (adm1029) Ensure the fan_div cache is updated in set_fan_div" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    hwmon: (adm1029) Ensure the fan_div cache is updated in set_fan_div

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 9ad8fa96a6af2c0e2c7928e71cb51899fce31fa3 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin at ingics.com>
Date: Wed, 2 Jul 2014 08:29:55 +0800
Subject: [PATCH 10/41] hwmon: (adm1029) Ensure the fan_div cache is updated in
 set_fan_div

commit 1035a9e3e9c76b64a860a774f5b867d28d34acc2 upstream.

Writing to fanX_div does not clear the cache. As a result, reading
from fanX_div may return the old value for up to two seconds
after writing a new value.

This patch ensures the fan_div cache is updated in set_fan_div().

Reported-by: Guenter Roeck <linux at roeck-us.net>
Signed-off-by: Axel Lin <axel.lin at ingics.com>
Signed-off-by: Guenter Roeck <linux at roeck-us.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/hwmon/adm1029.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c
index 9ee5e066423b..39441e5d922c 100644
--- a/drivers/hwmon/adm1029.c
+++ b/drivers/hwmon/adm1029.c
@@ -232,6 +232,9 @@ static ssize_t set_fan_div(struct device *dev,
 	/* Update the value */
 	reg = (reg & 0x3F) | (val << 6);

+	/* Update the cache */
+	data->fan_div[attr->index] = reg;
+
 	/* Write value */
 	i2c_smbus_write_byte_data(client,
 				  ADM1029_REG_FAN_DIV[attr->index], reg);
--
1.9.1