Bluetooth: Add helper variables to smp_distribute_keys()

This patch a couple of helper variables to the smp_distribute_keys
function in order to avoid long chains of dereferences and thereby help
readability.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index f060680..6355a46 100644 (file)
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -1132,22 +1132,24 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
 {
        struct smp_cmd_pairing *req, *rsp;
        struct smp_chan *smp = conn->smp_chan;
+       struct hci_conn *hcon = conn->hcon;
+       struct hci_dev *hdev = hcon->hdev;
        __u8 *keydist;
 
        BT_DBG("conn %p force %d", conn, force);
 
-       if (!test_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags))
+       if (!test_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags))
                return 0;
 
        rsp = (void *) &smp->prsp[1];
 
        /* The responder sends its keys first */
-       if (!force && conn->hcon->out && (rsp->resp_key_dist & 0x07))
+       if (!force && hcon->out && (rsp->resp_key_dist & 0x07))
                return 0;
 
        req = (void *) &smp->preq[1];
 
-       if (conn->hcon->out) {
+       if (hcon->out) {
                keydist = &rsp->init_key_dist;
                *keydist &= req->init_key_dist;
        } else {
@@ -1160,7 +1162,6 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
        if (*keydist & SMP_DIST_ENC_KEY) {
                struct smp_cmd_encrypt_info enc;
                struct smp_cmd_master_ident ident;
-               struct hci_conn *hcon = conn->hcon;
                struct smp_ltk *ltk;
                u8 authenticated;
                __le16 ediv;
@@ -1172,7 +1173,7 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
                smp_send_cmd(conn, SMP_CMD_ENCRYPT_INFO, sizeof(enc), &enc);
 
                authenticated = hcon->sec_level == BT_SECURITY_HIGH;
-               ltk = hci_add_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
+               ltk = hci_add_ltk(hdev, &hcon->dst, hcon->dst_type,
                                  HCI_SMP_LTK_SLAVE, authenticated, enc.ltk,
                                  smp->enc_key_size, ediv, ident.rand);
                smp->slave_ltk = ltk;
@@ -1195,7 +1196,7 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
 
                /* Just public address */
                memset(&addrinfo, 0, sizeof(addrinfo));
-               bacpy(&addrinfo.bdaddr, &conn->hcon->src);
+               bacpy(&addrinfo.bdaddr, &hcon->src);
 
                smp_send_cmd(conn, SMP_CMD_IDENT_ADDR_INFO, sizeof(addrinfo),
                             &addrinfo);
@@ -1214,8 +1215,8 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
                *keydist &= ~SMP_DIST_SIGN;
        }
 
-       if (conn->hcon->out || force || !(rsp->init_key_dist & 0x07)) {
-               clear_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags);
+       if (hcon->out || force || !(rsp->init_key_dist & 0x07)) {
+               clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags);
                cancel_delayed_work_sync(&conn->security_timer);
                set_bit(SMP_FLAG_COMPLETE, &smp->smp_flags);
                smp_notify_keys(conn);