From: Johan Hedberg Date: Tue, 28 Oct 2014 21:23:26 +0000 (+0100) Subject: Bluetooth: Fix LE connection timeout deadlock X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=980ffc0a2cec2c37589cc97993e1ad17252f4f47;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git Bluetooth: Fix LE connection timeout deadlock The le_conn_timeout() may call hci_le_conn_failed() which in turn may call hci_conn_del(). Trying to use the _sync variant for cancelling the conn timeout from hci_conn_del() could therefore result in a deadlock. This patch converts hci_conn_del() to use the non-sync variant so the deadlock is not possible. Signed-off-by: Johan Hedberg Signed-off-by: Marcel Holtmann Cc: stable@vger.kernel.org # 3.16.x --- diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index 6a3225bf7bac..74b8e2421e96 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -518,7 +518,7 @@ int hci_conn_del(struct hci_conn *conn) /* Unacked frames */ hdev->acl_cnt += conn->sent; } else if (conn->type == LE_LINK) { - cancel_delayed_work_sync(&conn->le_conn_timeout); + cancel_delayed_work(&conn->le_conn_timeout); if (hdev->le_pkts) hdev->le_cnt += conn->sent;