tree faae313def53ef67f886ce576a105e2024e45388
parent 6e6561d6bd693fdb138c131ee811aabc982e4efc
author Matt Simmering <matthew.simmering@intel.com> 1702509183 -0800
committer Zhikui Ren <zhikui.ren@intel.com> 1705630865 +0000

Set exitAirSensor to null before creating sensor

If the configuration for the current ExitAirTempSensor is changed the
service will crash because it will re-create its DBus interfaces. To
prevent this set exitAirSensor to nullptr before creating a new sensor.

Tested:
Change a property of the ExitAirTempSensor to something new to
re-trigger createSensors(), e.g.
busctl set-property xyz.openbmc_project.EntityManager
/xyz/openbmc_project/inventory/system/chassis/R4000_Chassis/Exit_Air_Temp
xyz.openbmc_project.Configuration.ExitAirTempSensor.Thresholds0 Value d 93

Without the fix the service would crash:
with the error: "exitairtempsensor:   what():  sd_bus_add_object_vtable:
org.freedesktop.DBus.Error.FileExists: File exists".  With the fix the
service doesn't crash and the property change holds.

Change-Id: I288140a8bd7ebb7119726720e0c829f3677a8aca
Signed-off-by: Matt Simmering <matthew.simmering@intel.com>