Rafael J. Wysocki be0a3600aa
thermal: sysfs: Rework the handling of trip point updates ...
Both trip_point_temp_store() and trip_point_hyst_store() use
thermal_zone_set_trip() to update a given trip point, but none of them
actually needs to change more than one field in struct thermal_trip
representing it. However, each of them effectively calls
__thermal_zone_get_trip() twice in a row for the same trip index value,
once directly and once via thermal_zone_set_trip(), which is not
particularly efficient, and the way in which thermal_zone_set_trip()
carries out the update is not particularly straightforward.
Moreover, input processing need not be done under the thermal zone lock
in any of these functions.
Rework trip_point_temp_store() and trip_point_hyst_store() to address
the above, move the part of thermal_zone_set_trip() that is still
useful to a new function called thermal_zone_trip_updated() and drop
the rest of it.
While at it, make trip_point_hyst_store() reject negative hysteresis
values.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com >
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org >
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