I have identified the patch that introduced the problem. Reverting the patch fixes it for 3.2.0-5.11. With the patch included, the problem persists.
The patch was introduced to net/bluetooth/hci_conn.c in 3.2.0-rc3:
@@ -673,7 +673,7 @@ int hci_conn_security(struct hci_conn *conn, __u8
sec_level, __u8 auth_type)
goto encrypt;
auth:
- if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
+ if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
return 0;
if (!hci_conn_auth(conn, sec_level, auth_type))
--
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https://bugs.launchpad.net/bugs/899877
Title:
Bluetooth headphones do not connect with A2DP starting from 3.2.0-2
kernel
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