Commit 793c51d5 authored Nov 15, 2010 by Jean Delvare Committed by Jean Delvare Nov 15, 2010

hwmon: (w83795) Clear intrusion alarm immediately

When asked to clear the intrusion alarm, do so immediately. We have to
invalidate the cache to make sure the new status will be read. But we
also have to read from the status register once to clear the pending
alarm, as writing to CLR_CHS surprising won't clear it automatically.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>

parent cf6b9ea6

drivers/hwmon/w83795.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -755,6 +755,10 @@ store_chassis_clear(struct device *dev,
		val = w83795_read(client, W83795_REG_CLR_CHASSIS);
		val \|= 0x80;
		w83795_write(client, W83795_REG_CLR_CHASSIS, val);

		/* Clear status and force cache refresh */
		w83795_read(client, W83795_REG_ALARM(5));
		data->valid = 0;
		mutex_unlock(&data->update_lock);
		return count;
		}

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