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Code

Bluetooth: hci_event: Add support for handling LE BIG Sync Lost event

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When the BIS source stops, the controller sends an LE BIG Sync Lost
event (subevent 0x1E). Currently, this event is not handled, causing
the BIS stream to remain active in BlueZ and preventing recovery.

Signed-off-by: Yang Li <yang.li@amlogic.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Yang Li 2025-07-01 15:56:22 +08:00 committed by Luiz Augusto von Dentz
parent 45b54f007d
commit b2a5f2e1c1
4 changed files with 49 additions and 4 deletions
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6
include/net/bluetooth/hci.h
View File

@ -2851,6 +2851,12 @@ struct hci_evt_le_big_sync_estabilished {
__le16 bis[];
} __packed;
#define HCI_EVT_LE_BIG_SYNC_LOST 0x1e
struct hci_evt_le_big_sync_lost {
__u8 handle;
__u8 reason;
} __packed;
#define HCI_EVT_LE_BIG_INFO_ADV_REPORT 0x22
struct hci_evt_le_big_info_adv_report {
__le16 sync_handle;

5
include/net/bluetooth/hci_core.h
View File

@ -1346,7 +1346,8 @@ hci_conn_hash_lookup_big_sync_pend(struct hci_dev *hdev,
}
static inline struct hci_conn *
hci_conn_hash_lookup_big_state(struct hci_dev *hdev, __u8 handle, __u16 state)
hci_conn_hash_lookup_big_state(struct hci_dev *hdev, __u8 handle, __u16 state,
__u8 role)
{
struct hci_conn_hash *h = &hdev->conn_hash;
struct hci_conn *c;
@ -1354,7 +1355,7 @@ hci_conn_hash_lookup_big_state(struct hci_dev *hdev, __u8 handle, __u16 state)
rcu_read_lock();
list_for_each_entry_rcu(c, &h->list, list) {
if (c->type != BIS_LINK || c->state != state)
if (c->type != BIS_LINK || c->state != state || c->role != role)
continue;
if (handle == c->iso_qos.bcast.big) {

3
net/bluetooth/hci_conn.c
View File

@ -2146,7 +2146,8 @@ struct hci_conn *hci_bind_bis(struct hci_dev *hdev, bdaddr_t *dst, __u8 sid,
struct hci_link *link;
/* Look for any BIS that is open for rebinding */
conn = hci_conn_hash_lookup_big_state(hdev, qos->bcast.big, BT_OPEN);
conn = hci_conn_hash_lookup_big_state(hdev, qos->bcast.big, BT_OPEN,
HCI_ROLE_MASTER);
if (conn) {
memcpy(qos, &conn->iso_qos, sizeof(*qos));
conn->state = BT_CONNECTED;

39
net/bluetooth/hci_event.c
View File

@ -6876,7 +6876,8 @@ static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
/* Connect all BISes that are bound to the BIG */
while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
BT_BOUND))) {
BT_BOUND,
HCI_ROLE_MASTER))) {
if (ev->status) {
hci_connect_cfm(conn, ev->status);
hci_conn_del(conn);
@ -6992,6 +6993,37 @@ unlock:
hci_dev_unlock(hdev);
}
static void hci_le_big_sync_lost_evt(struct hci_dev *hdev, void *data,
struct sk_buff *skb)
{
struct hci_evt_le_big_sync_lost *ev = data;
struct hci_conn *bis, *conn;
bt_dev_dbg(hdev, "big handle 0x%2.2x", ev->handle);
hci_dev_lock(hdev);
/* Delete the pa sync connection */
bis = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle);
if (bis) {
conn = hci_conn_hash_lookup_pa_sync_handle(hdev,
bis->sync_handle);
if (conn)
hci_conn_del(conn);
}
/* Delete each bis connection */
while ((bis = hci_conn_hash_lookup_big_state(hdev, ev->handle,
BT_CONNECTED,
HCI_ROLE_SLAVE))) {
clear_bit(HCI_CONN_BIG_SYNC, &bis->flags);
hci_disconn_cfm(bis, ev->reason);
hci_conn_del(bis);
}
hci_dev_unlock(hdev);
}
static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
struct sk_buff *skb)
{
@ -7115,6 +7147,11 @@ static const struct hci_le_ev {
hci_le_big_sync_established_evt,
sizeof(struct hci_evt_le_big_sync_estabilished),
HCI_MAX_EVENT_SIZE),
/* [0x1e = HCI_EVT_LE_BIG_SYNC_LOST] */
HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_LOST,
hci_le_big_sync_lost_evt,
sizeof(struct hci_evt_le_big_sync_lost),
HCI_MAX_EVENT_SIZE),
/* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
hci_le_big_info_adv_report_evt,