misc/ics932s401: Add a missing check to i2c_smbus_read_word_data

ics932s401_update_device may fail reading in i2c_smbus_read_word_data
due to error in i2c_smbus_xfer. The fix checks the status and defaults
the register to 0.
Signed-off-by: NAditya Pakki <pakki001@umn.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/ics932s401.c

@@ -146,6 +146,8 @@ static struct ics932s401_data *ics932s401_update_device(struct device *dev)
 	 */
 	for (i = 0; i < NUM_MIRRORED_REGS; i++) {
 		temp = i2c_smbus_read_word_data(client, regs_to_copy[i]);
+		if (temp < 0)
+			data->regs[regs_to_copy[i]] = 0;
 		data->regs[regs_to_copy[i]] = temp >> 8;
 	}