sched: re-register worker windows after re-enabling correctly

extern/sector-storage/manager_test.go

@@ -409,6 +409,9 @@ func TestReenableWorker(t *testing.T) {
 
 	time.Sleep(time.Millisecond * 100)
 
+	i, _ := m.sched.Info(ctx)
+	require.Len(t, i.(SchedDiagInfo).OpenWindows, 2)
+
 	// disable
 	atomic.StoreInt64(&w.testDisable, 1)
 
@@ -421,6 +424,9 @@ func TestReenableWorker(t *testing.T) {
 	}
 	require.False(t, m.WorkerStats()[w.session].Enabled)
 
+	i, _ = m.sched.Info(ctx)
+	require.Len(t, i.(SchedDiagInfo).OpenWindows, 0)
+
 	// reenable
 	atomic.StoreInt64(&w.testDisable, 0)
 
@@ -432,4 +438,16 @@ func TestReenableWorker(t *testing.T) {
 		time.Sleep(time.Millisecond * 3)
 	}
 	require.True(t, m.WorkerStats()[w.session].Enabled)
+
+	for i := 0; i < 100; i++ {
+		info, _ := m.sched.Info(ctx)
+		if len(info.(SchedDiagInfo).OpenWindows) != 0 {
+			break
+		}
+
+		time.Sleep(time.Millisecond * 3)
+	}
+
+	i, _ = m.sched.Info(ctx)
+	require.Len(t, i.(SchedDiagInfo).OpenWindows, 2)
 }

extern/sector-storage/sched_worker.go

@@ -125,10 +125,17 @@ func (sw *schedWorker) handleWorker() {
 			}
 
 			// session looks good
-			sched.workersLk.Lock()
-			worker.enabled = true
-			// we'll send window requests on the next loop
-			sched.workersLk.Unlock()
+			{
+				sched.workersLk.Lock()
+				enabled := worker.enabled
+				worker.enabled = true
+				sched.workersLk.Unlock()
+
+				if !enabled {
+					// go send window requests
+					break
+				}
+			}
 
 			// wait for more tasks to be assigned by the main scheduler or for the worker
 			// to finish precessing a task