Bluetooth: ISO: use correct CIS order in Set CIG Parameters event

The order of CIS handle array in Set CIG Parameters response shall match
the order of the CIS_ID array in the command (Core v5.3 Vol 4 Part E Sec
7.8.97).  We send CIS_IDs mainly in the order of increasing CIS_ID (but
with "last" CIS first if it has fixed CIG_ID).  In handling of the
reply, we currently assume this is also the same as the order of
hci_conn in hdev->conn_hash, but that is not true.

Match the correct hci_conn to the correct handle by matching them based
on the CIG+CIS combination.  The CIG+CIS combination shall be unique for
ISO_LINK hci_conn at state >= BT_BOUND, which we maintain in
hci_le_set_cig_params.

Fixes: 26afbd826ee3 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index fe38938..9654567 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1202,7 +1202,8 @@ static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
                if (id != BT_ISO_QOS_CIS_UNSET && id != c->iso_qos.ucast.cis)
                        continue;
 
-               if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
+               /* Match destination address if set */
+               if (!ba || (ba_type == c->dst_type && !bacmp(&c->dst, ba))) {
                        rcu_read_unlock();
                        return c;
                }

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index d00ef6e..09ba6d8 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3804,48 +3804,56 @@ static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
                                   struct sk_buff *skb)
 {
        struct hci_rp_le_set_cig_params *rp = data;
+       struct hci_cp_le_set_cig_params *cp;
        struct hci_conn *conn;
-       int i = 0;
+       u8 status = rp->status;
+       int i;
 
        bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 
+       cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
+       if (!cp || rp->num_handles != cp->num_cis || rp->cig_id != cp->cig_id) {
+               bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
+               status = HCI_ERROR_UNSPECIFIED;
+       }
+
        hci_dev_lock(hdev);
 
-       if (rp->status) {
+       if (status) {
                while ((conn = hci_conn_hash_lookup_cig(hdev, rp->cig_id))) {
                        conn->state = BT_CLOSED;
-                       hci_connect_cfm(conn, rp->status);
+                       hci_connect_cfm(conn, status);
                        hci_conn_del(conn);
                }
                goto unlock;
        }
 
-       rcu_read_lock();
+       /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
+        *
+        * If the Status return parameter is zero, then the Controller shall
+        * set the Connection_Handle arrayed return parameter to the connection
+        * handle(s) corresponding to the CIS configurations specified in
+        * the CIS_IDs command parameter, in the same order.
+        */
+       for (i = 0; i < rp->num_handles; ++i) {
+               conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
+                                               cp->cis[i].cis_id);
+               if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
+                       continue;
 
-       list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
-               if (conn->type != ISO_LINK ||
-                   conn->iso_qos.ucast.cig != rp->cig_id ||
-                   conn->state == BT_CONNECTED)
+               if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
                        continue;
 
-               conn->handle = __le16_to_cpu(rp->handle[i++]);
+               conn->handle = __le16_to_cpu(rp->handle[i]);
 
                bt_dev_dbg(hdev, "%p handle 0x%4.4x parent %p", conn,
                           conn->handle, conn->parent);
 
                /* Create CIS if LE is already connected */
-               if (conn->parent && conn->parent->state == BT_CONNECTED) {
-                       rcu_read_unlock();
+               if (conn->parent && conn->parent->state == BT_CONNECTED)
                        hci_le_create_cis(conn);
-                       rcu_read_lock();
-               }
-
-               if (i == rp->num_handles)
-                       break;
        }
 
-       rcu_read_unlock();
-
 unlock:
        hci_dev_unlock(hdev);