drm/nouveau/therm: fix a potential deadlock in the therm monitoring code

Signed-off-by: Martin Peres <martin.peres@free.fr>
Tested-by: Stefan Ringel <mail@stefanringel.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/subdev/therm/temp.c

@@ -192,11 +192,11 @@ alarm_timer_callback(struct nouveau_alarm *alarm)
 	nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown,
 					     NOUVEAU_THERM_THRS_SHUTDOWN);
 
+	spin_unlock_irqrestore(&priv->sensor.alarm_program_lock, flags);
+
 	/* schedule the next poll in one second */
 	if (therm->temp_get(therm) >= 0 && list_empty(&alarm->head))
-		ptimer->alarm(ptimer, 1000 * 1000 * 1000, alarm);
-
-	spin_unlock_irqrestore(&priv->sensor.alarm_program_lock, flags);
+		ptimer->alarm(ptimer, 1000000000ULL, alarm);
 }
 
 void