Don't send device list updates for appservice devices

appservice/appservice.go

@@ -135,6 +135,7 @@ func generateAppServiceAccount(
 		AccessToken:        as.ASToken,
 		DeviceID:           &as.SenderLocalpart,
 		DeviceDisplayName:  &as.SenderLocalpart,
+		NoDeviceListUpdate: true,
 	}, &devRes)
 	return err
 }

userapi/api/api.go

@@ -290,6 +290,10 @@ type PerformDeviceCreationRequest struct {
 	IPAddr string
 	// Useragent for this device
 	UserAgent string
+	// NoDeviceListUpdate determines whether we should avoid sending a device list
+	// update for this account. Generally the only reason to do this is if the account
+	// is an appservice account.
+	NoDeviceListUpdate bool
 }
 
 // PerformDeviceCreationResponse is the response for PerformDeviceCreation

userapi/internal/api.go

@@ -119,6 +119,9 @@ func (a *UserInternalAPI) PerformDeviceCreation(ctx context.Context, req *api.Pe
 	}
 	res.DeviceCreated = true
 	res.Device = dev
+	if req.NoDeviceListUpdate {
+		return nil
+	}
 	// create empty device keys and upload them to trigger device list changes
 	return a.deviceListUpdate(dev.UserID, []string{dev.ID})
 }