This is a note to let you know that I've just added the patch titled
hwmon: (adm1029) Ensure the fan_div cache is updated in set_fan_div
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hwmon-adm1029-ensure-the-fan_div-cache-is-updated-in-set_fan_div.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1035a9e3e9c76b64a860a774f5b867d28d34acc2 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@xxxxxxxxxx>
Date: Wed, 2 Jul 2014 08:29:55 +0800
Subject: hwmon: (adm1029) Ensure the fan_div cache is updated in set_fan_div
From: Axel Lin <axel.lin@xxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: Axel Lin <axel.lin@xxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hwmon/adm1029.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/hwmon/adm1029.c
+++ b/drivers/hwmon/adm1029.c
@@ -231,6 +231,9 @@ static ssize_t set_fan_div(struct device
/* 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);
Patches currently in stable-queue which might be from axel.lin@xxxxxxxxxx are
queue-3.4/hwmon-amc6821-fix-permissions-for-temp2_input.patch
queue-3.4/hwmon-adm1029-ensure-the-fan_div-cache-is-updated-in-set_fan_div.patch
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