Hi,
What I found in net/bluetooth/hci_core.c and net/bluetooth/hci_event.c are
(1) the "Flush Occured Event" (ocf 0x11) is not handled in hci_event
(2) while the user socket keeps pushing the data via
l2cap_sock_sendmsg->l2cap_do_send->hci_send_acl
->hci_sched_tx->hci_tx_task->hci_sched_acl
Eventually it stops in hci_sched_acl when checking hdev->acl_cnt.
I consider that hdev->acl_cnt means: "the number of ACL packet we can push to
hci_usb".
Thus, I think the possible way to handle this event is to
(1) add in "include/net/bluetooth/hci.h"
#define HCI_EV_FLUSH_OCCURED 0x11
(2) catch the event in hci_event_packet, and do the following (same as
hci_num_comp_pkts_evt)
if ((++ hdev->acl_cnt) > hdev->acl_pkts) hdev->acl_cnt = hdev->acl_pkts;
(3) decrement the conn->sent by
atomic_sub(count, &conn->sent);
Please correct me if I am wrong.
Jui-Hao
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