mlxsw: core_thermal: Simplify transceiver module get_temp() callback

The get_temp() callback of a thermal zone associated with a transceiver
module no longer needs to read the temperature thresholds of the module.
Therefore, simplify the callback by only reading the temperature.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/core_thermal.c

@@ -283,50 +283,22 @@ static int mlxsw_thermal_module_unbind(struct thermal_zone_device *tzdev,
 	return err;
 }
 
-static void
-mlxsw_thermal_module_temp_and_thresholds_get(struct mlxsw_core *core,
-					     u8 slot_index, u16 sensor_index,
-					     int *p_temp, int *p_crit_temp,
-					     int *p_emerg_temp)
-{
-	char mtmp_pl[MLXSW_REG_MTMP_LEN];
-	int err;
-
-	/* Read module temperature and thresholds. */
-	mlxsw_reg_mtmp_pack(mtmp_pl, slot_index, sensor_index,
-			    false, false);
-	err = mlxsw_reg_query(core, MLXSW_REG(mtmp), mtmp_pl);
-	if (err) {
-		/* Set temperature and thresholds to zero to avoid passing
-		 * uninitialized data back to the caller.
-		 */
-		*p_temp = 0;
-		*p_crit_temp = 0;
-		*p_emerg_temp = 0;
-
-		return;
-	}
-	mlxsw_reg_mtmp_unpack(mtmp_pl, p_temp, NULL, p_crit_temp, p_emerg_temp,
-			      NULL);
-}
-
 static int mlxsw_thermal_module_temp_get(struct thermal_zone_device *tzdev,
 					 int *p_temp)
 {
 	struct mlxsw_thermal_module *tz = tzdev->devdata;
 	struct mlxsw_thermal *thermal = tz->parent;
-	int temp, crit_temp, emerg_temp;
+	char mtmp_pl[MLXSW_REG_MTMP_LEN];
 	u16 sensor_index;
+	int err;
 
 	sensor_index = MLXSW_REG_MTMP_MODULE_INDEX_MIN + tz->module;
-
-	/* Read module temperature and thresholds. */
-	mlxsw_thermal_module_temp_and_thresholds_get(thermal->core,
-						     tz->slot_index,
-						     sensor_index, &temp,
-						     &crit_temp, &emerg_temp);
-	*p_temp = temp;
-
+	mlxsw_reg_mtmp_pack(mtmp_pl, tz->slot_index, sensor_index,
+			    false, false);
+	err = mlxsw_reg_query(thermal->core, MLXSW_REG(mtmp), mtmp_pl);
+	if (err)
+		return err;
+	mlxsw_reg_mtmp_unpack(mtmp_pl, p_temp, NULL, NULL, NULL, NULL);
 	return 0;
 }