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thermal: core: Fix list sorting in __thermal_zone_device_update()

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The order in which lists are sorted in __thermal_zone_device_update()
is reverse with respect to what it should be due to a mistake in
thermal_trip_notify_cmp().

Fix it and observe that it is not necessary to sort the lists in
different orders.  They can both be sorted in ascending order if
way_down_list is walked in reverse order which allows the code to
be slightly more straightforward (and less prone to silly mistakes).

Fixes: 7454f2c42c ("thermal: core: Sort trip point crossing notifications by temperature")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/12481676.O9o76ZdvQC@rjwysocki.net
This commit is contained in:
Rafael J. Wysocki 2024-07-08 17:16:00 +02:00
parent a8a2617744
commit 94eacc1c58
1 changed files with 4 additions and 6 deletions
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10
drivers/thermal/thermal_core.c
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@ -484,16 +484,14 @@ static void thermal_trip_crossed(struct thermal_zone_device *tz,
thermal_governor_trip_crossed(governor, tz, trip, crossed_up);
}
static int thermal_trip_notify_cmp(void *ascending, const struct list_head *a,
static int thermal_trip_notify_cmp(void *not_used, const struct list_head *a,
const struct list_head *b)
{
struct thermal_trip_desc *tda = container_of(a, struct thermal_trip_desc,
notify_list_node);
struct thermal_trip_desc *tdb = container_of(b, struct thermal_trip_desc,
notify_list_node);
int ret = tdb->notify_temp - tda->notify_temp;
return ascending ? ret : -ret;
return tda->notify_temp - tdb->notify_temp;
}
void __thermal_zone_device_update(struct thermal_zone_device *tz,
@ -522,12 +520,12 @@ void __thermal_zone_device_update(struct thermal_zone_device *tz,
for_each_trip_desc(tz, td)
handle_thermal_trip(tz, td, &way_up_list, &way_down_list);
list_sort(&way_up_list, &way_up_list, thermal_trip_notify_cmp);
list_sort(NULL, &way_up_list, thermal_trip_notify_cmp);
list_for_each_entry(td, &way_up_list, notify_list_node)
thermal_trip_crossed(tz, &td->trip, governor, true);
list_sort(NULL, &way_down_list, thermal_trip_notify_cmp);
list_for_each_entry(td, &way_down_list, notify_list_node)
list_for_each_entry_reverse(td, &way_down_list, notify_list_node)
thermal_trip_crossed(tz, &td->trip, governor, false);
if (governor->manage)