1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/thermal/power_allocator.c b/drivers/thermal/power_allocator.c
index 7ff96270c933..e570ff084add 100644
--- a/drivers/thermal/power_allocator.c
+++ b/drivers/thermal/power_allocator.c
@@ -144,6 +144,16 @@ static void estimate_pid_constants(struct thermal_zone_device *tz,
                 switch_on_temp = 0;
 
         temperature_threshold = control_temp - switch_on_temp;
+        /*
+         * estimate_pid_constants() tries to find appropriate default
+         * values for thermal zones that don't provide them. If a
+         * system integrator has configured a thermal zone with two
+         * passive trip points at the same temperature, that person
+         * hasn't put any effort to set up the thermal zone properly
+         * so just give up.
+         */
+        if (!temperature_threshold)
+                return;
 
         if (!tz->tzp->k_po || force)
                 tz->tzp->k_po = int_to_frac(sustainable_power) /