linux-kernel - [PATCH 4.19 08/21] Bluetooth: Consolidate encryption handling in hci_encrypt

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Message-Id: <20201016090437.716750153@linuxfoundation.org>
Date:   Fri, 16 Oct 2020 11:07:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Hans-Christian Noren Egtvedt <hegtvedt@...co.com>
Subject: [PATCH 4.19 08/21] Bluetooth: Consolidate encryption handling in hci_encrypt_cfm

From: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>

commit 3ca44c16b0dcc764b641ee4ac226909f5c421aa3 upstream.

This makes hci_encrypt_cfm calls hci_connect_cfm in case the connection
state is BT_CONFIG so callers don't have to check the state.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Cc: Hans-Christian Noren Egtvedt <hegtvedt@...co.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/net/bluetooth/hci_core.h |   20 ++++++++++++++++++--
 net/bluetooth/hci_event.c        |   28 +++-------------------------
 2 files changed, 21 insertions(+), 27 deletions(-)

--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1287,10 +1287,26 @@ static inline void hci_auth_cfm(struct h
 		conn->security_cfm_cb(conn, status);
 }
 
-static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
-								__u8 encrypt)
+static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
 {
 	struct hci_cb *cb;
+	__u8 encrypt;
+
+	if (conn->state == BT_CONFIG) {
+		if (status)
+			conn->state = BT_CONNECTED;
+
+		hci_connect_cfm(conn, status);
+		hci_conn_drop(conn);
+		return;
+	}
+
+	if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
+		encrypt = 0x00;
+	else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
+		encrypt = 0x02;
+	else
+		encrypt = 0x01;
 
 	if (conn->sec_level == BT_SECURITY_SDP)
 		conn->sec_level = BT_SECURITY_LOW;
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2756,7 +2756,7 @@ static void hci_auth_complete_evt(struct
 				     &cp);
 		} else {
 			clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
-			hci_encrypt_cfm(conn, ev->status, 0x00);
+			hci_encrypt_cfm(conn, ev->status);
 		}
 	}
 
@@ -2841,22 +2841,7 @@ static void read_enc_key_size_complete(s
 		conn->enc_key_size = rp->key_size;
 	}
 
-	if (conn->state == BT_CONFIG) {
-		conn->state = BT_CONNECTED;
-		hci_connect_cfm(conn, 0);
-		hci_conn_drop(conn);
-	} else {
-		u8 encrypt;
-
-		if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
-			encrypt = 0x00;
-		else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
-			encrypt = 0x02;
-		else
-			encrypt = 0x01;
-
-		hci_encrypt_cfm(conn, 0, encrypt);
-	}
+	hci_encrypt_cfm(conn, 0);
 
 unlock:
 	hci_dev_unlock(hdev);
@@ -2955,14 +2940,7 @@ static void hci_encrypt_change_evt(struc
 	}
 
 notify:
-	if (conn->state == BT_CONFIG) {
-		if (!ev->status)
-			conn->state = BT_CONNECTED;
-
-		hci_connect_cfm(conn, ev->status);
-		hci_conn_drop(conn);
-	} else
-		hci_encrypt_cfm(conn, ev->status, ev->encrypt);
+	hci_encrypt_cfm(conn, ev->status);
 
 unlock:
 	hci_dev_unlock(hdev);