Hi Kang, > In http://lxr.linux.no/linux+v2.6.27/net/bluetooth/hci_event.c, hci_remote_features_evt() contains the following code: > > if (!ev->status && lmp_ssp_capable(hdev) && > lmp_ssp_capable(conn)) { > struct hci_cp_read_remote_ext_features cp; > cp.handle = ev->handle; > cp.page = 0x01; > hci_send_cmd(hdev, > HCI_OP_READ_REMOTE_EXT_FEATURES, > sizeof(cp), &cp); > } > > Should the if-statement check to make sure LMP Extended Features is supported before sending the HCI_OP_READ_REMOTE_EXT_FEATURES command? Or does the fact that a remote device is SSP-capable imply LMP Extended Features is supported as well? if you support SSP, you have to support extended features. The host features bits for SSP are in the second features page and thus it is required to support this. Regards Marcel -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html