From: Rafael J. Wysocki rafael.j.wysocki@intel.com
[ Upstream commit acd7e9ee57c880b99671dd99680cb707b7b5b0ee ]
In order to prevent int340x_thermal_get_trip_type() from possibly racing with int340x_thermal_read_trips() invoked by int3403_notify() add locking to it in analogy with int340x_thermal_get_trip_temp().
Fixes: 6757a7abe47b ("thermal: intel: int340x: Protect trip temperature from concurrent updates") Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../intel/int340x_thermal/int340x_thermal_zone.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c index c9e0050bce17..6952f4e237e1 100644 --- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c @@ -81,11 +81,13 @@ static int int340x_thermal_get_trip_type(struct thermal_zone_device *zone, enum thermal_trip_type *type) { struct int34x_thermal_zone *d = zone->devdata; - int i; + int i, ret = 0;
if (d->override_ops && d->override_ops->get_trip_type) return d->override_ops->get_trip_type(zone, trip, type);
+ mutex_lock(&d->trip_mutex); + if (trip < d->aux_trip_nr) *type = THERMAL_TRIP_PASSIVE; else if (trip == d->crt_trip_id) @@ -103,10 +105,12 @@ static int int340x_thermal_get_trip_type(struct thermal_zone_device *zone, } } if (i == INT340X_THERMAL_MAX_ACT_TRIP_COUNT) - return -EINVAL; + ret = -EINVAL; }
- return 0; + mutex_unlock(&d->trip_mutex); + + return ret; }
static int int340x_thermal_set_trip_temp(struct thermal_zone_device *zone,