From: Vadim Pasternak <vadimp@mellanox.com>
Date: Sun, 7 Jun 2020 11:10:27 +0300
Subject: mlxsw: core: Use different get_trend() callbacks for different
thermal zones
Git-commit: 2dc2f760052da4925482ecdcdc5c94d4a599153c
Patch-mainline: 5.8-rc1
References: networking-stable-20_06_10
The driver registers three different types of thermal zones: For the
ASIC itself, for port modules and for gearboxes.
Currently, all three types use the same get_trend() callback which does
not work correctly for the ASIC thermal zone. The callback assumes that
the device data is of type 'struct mlxsw_thermal_module', whereas for
the ASIC thermal zone 'struct mlxsw_thermal' is passed as device data.
Fix this by using one get_trend() callback for the ASIC thermal zone and
another for the other two types.
Fixes: 6f73862fabd9 ("mlxsw: core: Add the hottest thermal zone detection")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
.../ethernet/mellanox/mlxsw/core_thermal.c | 23 +++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
index ce0a6837daa3..05f8d5a92862 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
@@ -391,8 +391,7 @@ static int mlxsw_thermal_set_trip_hyst(struct thermal_zone_device *tzdev,
static int mlxsw_thermal_trend_get(struct thermal_zone_device *tzdev,
int trip, enum thermal_trend *trend)
{
- struct mlxsw_thermal_module *tz = tzdev->devdata;
- struct mlxsw_thermal *thermal = tz->parent;
+ struct mlxsw_thermal *thermal = tzdev->devdata;
if (trip < 0 || trip >= MLXSW_THERMAL_NUM_TRIPS)
return -EINVAL;
@@ -593,6 +592,22 @@ mlxsw_thermal_module_trip_hyst_set(struct thermal_zone_device *tzdev, int trip,
return 0;
}
+static int mlxsw_thermal_module_trend_get(struct thermal_zone_device *tzdev,
+ int trip, enum thermal_trend *trend)
+{
+ struct mlxsw_thermal_module *tz = tzdev->devdata;
+ struct mlxsw_thermal *thermal = tz->parent;
+
+ if (trip < 0 || trip >= MLXSW_THERMAL_NUM_TRIPS)
+ return -EINVAL;
+
+ if (tzdev == thermal->tz_highest_dev)
+ return 1;
+
+ *trend = THERMAL_TREND_STABLE;
+ return 0;
+}
+
static struct thermal_zone_device_ops mlxsw_thermal_module_ops = {
.bind = mlxsw_thermal_module_bind,
.unbind = mlxsw_thermal_module_unbind,
@@ -604,7 +619,7 @@ static struct thermal_zone_device_ops mlxsw_thermal_module_ops = {
.set_trip_temp = mlxsw_thermal_module_trip_temp_set,
.get_trip_hyst = mlxsw_thermal_module_trip_hyst_get,
.set_trip_hyst = mlxsw_thermal_module_trip_hyst_set,
- .get_trend = mlxsw_thermal_trend_get,
+ .get_trend = mlxsw_thermal_module_trend_get,
};
static int mlxsw_thermal_gearbox_temp_get(struct thermal_zone_device *tzdev,
@@ -643,7 +658,7 @@ static struct thermal_zone_device_ops mlxsw_thermal_gearbox_ops = {
.set_trip_temp = mlxsw_thermal_module_trip_temp_set,
.get_trip_hyst = mlxsw_thermal_module_trip_hyst_get,
.set_trip_hyst = mlxsw_thermal_module_trip_hyst_set,
- .get_trend = mlxsw_thermal_trend_get,
+ .get_trend = mlxsw_thermal_module_trend_get,
};
static int mlxsw_thermal_get_max_state(struct thermal_cooling_device *cdev,
--
2.27.0