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[v2,1/1] Bluetooth: ISO: Fix BIS cleanup

Message ID 20230906135954.9165-2-iulia.tanasescu@nxp.com
State Accepted
Commit 7b9836f6c7705c07f95f9ba3b7dbbc41719f5272
Headers show
Series Bluetooth: ISO: Fix BIS cleanup | expand

Commit Message

Iulia Tanasescu Sept. 6, 2023, 1:59 p.m. UTC
This fixes the master BIS cleanup procedure - as opposed to CIS cleanup,
no HCI disconnect command should be issued. A master BIS should only be
terminated by disabling periodic and extended advertising, and terminating
the BIG.

In case of a Broadcast Receiver, all BIS and PA connections can be
cleaned up by calling hci_conn_failed, since it contains all function
calls that are necessary for successful cleanup.

Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
---
 include/net/bluetooth/hci_sync.h |  2 ++
 net/bluetooth/hci_conn.c         |  7 +++++++
 net/bluetooth/hci_sync.c         | 28 ++++++++++++----------------
 3 files changed, 21 insertions(+), 16 deletions(-)
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Patch

diff --git a/include/net/bluetooth/hci_sync.h b/include/net/bluetooth/hci_sync.h
index 57eeb07aeb25..6efbc2152146 100644
--- a/include/net/bluetooth/hci_sync.h
+++ b/include/net/bluetooth/hci_sync.h
@@ -80,6 +80,8 @@  int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
 			   u8 *data, u32 flags, u16 min_interval,
 			   u16 max_interval, u16 sync_interval);
 
+int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance);
+
 int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
 				u8 instance, bool force);
 int hci_disable_advertising_sync(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 9d5057cef30a..7c8a5cc72e89 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -759,6 +759,7 @@  static int terminate_big_sync(struct hci_dev *hdev, void *data)
 
 	bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", d->big, d->bis);
 
+	hci_disable_per_advertising_sync(hdev, d->bis);
 	hci_remove_ext_adv_instance_sync(hdev, d->bis, NULL);
 
 	/* Only terminate BIG if it has been created */
@@ -1247,6 +1248,12 @@  void hci_conn_failed(struct hci_conn *conn, u8 status)
 		break;
 	}
 
+	/* In case of BIG/PA sync failed, clear conn flags so that
+	 * the conns will be correctly cleaned up by ISO layer
+	 */
+	test_and_clear_bit(HCI_CONN_BIG_SYNC_FAILED, &conn->flags);
+	test_and_clear_bit(HCI_CONN_PA_SYNC_FAILED, &conn->flags);
+
 	conn->state = BT_CLOSED;
 	hci_connect_cfm(conn, status);
 	hci_conn_del(conn);
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index fd7c5d902856..ec4dfc4c5749 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -1312,7 +1312,7 @@  int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
 	return hci_enable_ext_advertising_sync(hdev, instance);
 }
 
-static int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
+int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
 {
 	struct hci_cp_le_set_per_adv_enable cp;
 	struct adv_info *adv = NULL;
@@ -5231,6 +5231,17 @@  static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
 	if (conn->type == AMP_LINK)
 		return hci_disconnect_phy_link_sync(hdev, conn->handle, reason);
 
+	if (test_bit(HCI_CONN_BIG_CREATED, &conn->flags)) {
+		/* This is a BIS connection, hci_conn_del will
+		 * do the necessary cleanup.
+		 */
+		hci_dev_lock(hdev);
+		hci_conn_failed(conn, reason);
+		hci_dev_unlock(hdev);
+
+		return 0;
+	}
+
 	memset(&cp, 0, sizeof(cp));
 	cp.handle = cpu_to_le16(conn->handle);
 	cp.reason = reason;
@@ -5382,21 +5393,6 @@  int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
 		err = hci_reject_conn_sync(hdev, conn, reason);
 		break;
 	case BT_OPEN:
-		hci_dev_lock(hdev);
-
-		/* Cleanup bis or pa sync connections */
-		if (test_and_clear_bit(HCI_CONN_BIG_SYNC_FAILED, &conn->flags) ||
-		    test_and_clear_bit(HCI_CONN_PA_SYNC_FAILED, &conn->flags)) {
-			hci_conn_failed(conn, reason);
-		} else if (test_bit(HCI_CONN_PA_SYNC, &conn->flags) ||
-			   test_bit(HCI_CONN_BIG_SYNC, &conn->flags)) {
-			conn->state = BT_CLOSED;
-			hci_disconn_cfm(conn, reason);
-			hci_conn_del(conn);
-		}
-
-		hci_dev_unlock(hdev);
-		return 0;
 	case BT_BOUND:
 		hci_dev_lock(hdev);
 		hci_conn_failed(conn, reason);