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hwmon: (it87) Preserve configuration register bits on init

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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>
This commit is contained in:
Jean Delvare 2012-07-12 22:47:37 +02:00 • committed by Jean Delvare
parent 918227bb1b
commit 41002f8dd5
1 changed files with 1 additions and 1 deletions
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2
drivers/hwmon/it87.c
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@ -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));
}