linux-kernel - [PATCH] Bluetooth: hci_event: Hold PA sync conn when BIG sync established

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Message-Id: <20250702-hold_pa_sync-v1-1-3cbdd2c29c41@amlogic.com>
Date: Wed, 02 Jul 2025 11:12:12 +0800
From: Yang Li via B4 Relay <devnull+yang.li.amlogic.com@...nel.org>
To: Marcel Holtmann <marcel@...tmann.org>, 
 Johan Hedberg <johan.hedberg@...il.com>, 
 Luiz Augusto von Dentz <luiz.dentz@...il.com>
Cc: linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Yang Li <yang.li@...ogic.com>
Subject: [PATCH] Bluetooth: hci_event: Hold PA sync conn when BIG sync
 established

From: Yang Li <yang.li@...ogic.com>

Hold PA sync connection to prevent cleanup during hci_conn_timeout.

Signed-off-by: Yang Li <yang.li@...ogic.com>
---
 net/bluetooth/hci_event.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index e817c4a77f97..85ae1608e028 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -6968,6 +6968,9 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
 
 		if (!ev->status) {
 			conn->state = BT_CONNECTED;
+			/* Prevent cleanup in hci_conn_timeout. */
+			hci_conn_hold(conn);
+
 			set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
 			hci_debugfs_create_conn(conn);
 			hci_conn_add_sysfs(conn);

---
base-commit: 3bc46213b81278f3a9df0324768e152de71eb9fe
change-id: 20250702-hold_pa_sync-91ca7a81adf0

Best regards,
-- 
Yang Li <yang.li@...ogic.com>