hwmon: (it87) Preserve configuration register bits on init

We were accidentally losing one bit in the configuration register on
device initialization. It was reported to freeze one specific system
right away. Properly preserve all bits we don't explicitly want to
change in order to prevent that.

Reported-by: Stevie Trujillo <stevie.trujillo@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index e7701d99f8e8598207a18de6b6ad7f48a0796073..f1de3979181fd22517c1f068a57d4526cb0ce6e8 100644 (file)
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -2341,7 +2341,7 @@ static void __devinit it87_init_device(struct platform_device *pdev)
 
        /* Start monitoring */
        it87_write_value(data, IT87_REG_CONFIG,
-                        (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
+                        (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
                         | (update_vbat ? 0x41 : 0x01));
 }