Hi, Currently we have found a problem when using the kernel Bluetooth protocol stack. Bluetooth hardware: support BR/BLE USB Client Module Kernel version: 3.18.20 The problem: our host received the HCI_EV_CONN_REQUEST event, in this event call hci_conn_add () and create a struct hci_conn, then the host will send HCI_OP_ACCEPT_SYNC_CONN_REQ command in the event processing. However, according to the Bluetooth protocol core_v5.0 description, the host will then receive a Command Status event or Synchronous Connection Complete event or Connection Complete event for the link, which will include Connection_Handle and the link parameters if the setup is successful. However, the host did not receive these events for the link. Hdev->rx_work workqueue is still working to collect events. After a period of time, the host receives an HCI_EV_CHANNEL_SELECTED event, which is to operate the hci_conn->amp_mgr structure, but the host has not received any events containing any information in the structure, this structure has not been created, so the kernel appears oops Thanks and Best Regards! Hongyi Mao
