EEBus: abort run loop and limit assertion on context cancellation (#32494)

meter/eebus.go

@@ -23,6 +23,7 @@ import (
 // Uses MPC (Monitoring & Power Consumption) for all other cases (default)
 // Additionally supports LPC (Limitation of Power Consumption) and LPP (Limitation of Power Production)
 type EEBus struct {
+	ctx context.Context // device lifetime, aborts limit retries
 	log *util.Logger
 
 	connector *eebus.Connector
@@ -114,6 +115,7 @@ func NewEEBus(ctx context.Context, ski, ip string, usage *templates.Usage) (api.
 	}
 
 	c := &EEBus{
+		ctx:            ctx,
 		log:            util.NewLogger("eebus-" + useCase),
 		ma:             ma,
 		eg:             inst.EnergyGuard(),

meter/eebus_events.go

@@ -81,7 +81,7 @@ func (c *EEBus) egLpcUseCaseSupportUpdate(entity spineapi.EntityRemoteInterface)
 		c.egLpcEntity = entity
 
 		// [LPC-913]: state the limit to the newly available CS
-		go eebus.AssertLimit(c.log, func() error { return c.Dim(c.lastDimmed()) })
+		go eebus.AssertLimit(c.ctx, c.log, func() error { return c.Dim(c.lastDimmed()) })
 	}
 }
 
@@ -98,6 +98,6 @@ func (c *EEBus) egLppUseCaseSupportUpdate(entity spineapi.EntityRemoteInterface)
 		c.egLppEntity = entity
 
 		// [LPP-913]: state the limit to the newly available CS
-		go eebus.AssertLimit(c.log, func() error { return c.SetCurtailPercent(c.lastCurtailPercent()) })
+		go eebus.AssertLimit(c.ctx, c.log, func() error { return c.SetCurtailPercent(c.lastCurtailPercent()) })
 	}
 }

meter/eebus_lpc_lpp_test.go

@@ -30,6 +30,7 @@ func newEGMeter(t *testing.T) (*EEBus, *egmocks.EgLPCInterface, *egmocks.EgLPPIn
 	entity := spinemocks.NewEntityRemoteInterface(t)
 
 	c := &EEBus{
+		ctx:         t.Context(),
 		log:         util.NewLogger("eebus-eg-test"),
 		eg:          &eebus.EnergyGuard{EgLPCInterface: lpc, EgLPPInterface: lpp},
 		egLpcEntity: entity,