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Bluetooth: Simplify Link Key Notification event handling logic 

When we get a Link Key Notification HCI event we should already have a
hci_conn object. This should have been created either in the Connection
Request event handler, the hci_connect_acl() function or the
hci_cs_create_conn() function (if the request was not sent by the
kernel).

Since the only case that we'd end up not having a hci_conn in the Link
Key Notification event handler would be essentially broken hardware it's
safe to simply bail out from the function if this happens.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-12-03 11:03:06 +02:00 committed by Marcel Holtmann
parent 0bd49fc75a
commit 82c13d42bb
1 changed files with 14 additions and 11 deletions
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25
net/bluetooth/hci_event.c
View File

@ -3294,12 +3294,14 @@ static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_dev_lock(hdev); hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
if (conn) { if (!conn)
hci_conn_hold(conn); goto unlock;
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
hci_conn_drop(conn); hci_conn_hold(conn);
conn_set_key(conn, ev->key_type, conn->pin_length); conn->disc_timeout = HCI_DISCONN_TIMEOUT;
} hci_conn_drop(conn);
conn_set_key(conn, ev->key_type, conn->pin_length);
if (!test_bit(HCI_MGMT, &hdev->dev_flags)) if (!test_bit(HCI_MGMT, &hdev->dev_flags))
goto unlock; goto unlock;
@ -3326,13 +3328,14 @@ static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
!test_bit(HCI_KEEP_DEBUG_KEYS, &hdev->dev_flags)) { !test_bit(HCI_KEEP_DEBUG_KEYS, &hdev->dev_flags)) {
list_del_rcu(&key->list); list_del_rcu(&key->list);
kfree_rcu(key, rcu); kfree_rcu(key, rcu);
} else if (conn) { goto unlock;
if (persistent)
clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
else
set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
} }
if (persistent)
clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
else
set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
unlock: unlock:
hci_dev_unlock(hdev); hci_dev_unlock(hdev);
} }