[PATCH v2 11/16] hwmon: (mr75203) add protection for negative voltage value

[Eliav Farber]

This change makes sure the returned voltage vlaue is 0 or positive.

Signed-off-by: Eliav Farber <farbere@xxxxxxxxxx>
---
 drivers/hwmon/mr75203.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c
index 24a00339cfd8..e3191f590167 100644
--- a/drivers/hwmon/mr75203.c
+++ b/drivers/hwmon/mr75203.c
@@ -218,6 +218,13 @@ static int pvt_read_in(struct device *dev, u32 attr, int channel, long *val)
 			return ret;
 
 		n &= SAMPLE_DATA_MSK;
+
+		/* Voltage can't be negative */
+		if (PVT_N_CONST * n < PVT_R_CONST) {
+			*val = 0;
+			return 0;
+		}
+
 		/* Convert the N bitstream count into voltage */
 		*val = pvt->vd[channel].pre_scaler;
 		*val *= (PVT_N_CONST * n - PVT_R_CONST);
-- 
2.37.1