[PATCH 3.14 115/130] hwmon: (ads1015) Handle negative conversion values correctly

From: Greg Kroah-Hartman
Date: Tue Mar 01 2016 - 20:38:49 EST


3.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Peter Rosin <peda@xxxxxxxxxx>

commit acc146943957d7418a6846f06e029b2c5e87e0d5 upstream.

Make the divisor signed as DIV_ROUND_CLOSEST is undefined for negative
dividends when the divisor is unsigned.

Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/hwmon/ads1015.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwmon/ads1015.c
+++ b/drivers/hwmon/ads1015.c
@@ -126,7 +126,7 @@ static int ads1015_reg_to_mv(struct i2c_
struct ads1015_data *data = i2c_get_clientdata(client);
unsigned int pga = data->channel_data[channel].pga;
int fullscale = fullscale_table[pga];
- const unsigned mask = data->id == ads1115 ? 0x7fff : 0x7ff0;
+ const int mask = data->id == ads1115 ? 0x7fff : 0x7ff0;

return DIV_ROUND_CLOSEST(reg * fullscale, mask);
}