[Bluetooth] Make use of the default link policy settings

The Bluetooth specification supports the default link policy settings
on a per host controller basis. For every new connection the link
manager would then use these settings. It is better to use this instead
of bothering the controller on every connection setup to overwrite the
default settings.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 63 insertions, 12 deletions

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index d4d2dcc40fc7..9af181a61650 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -110,6 +110,25 @@ static void hci_cc_role_discovery(struct hci_dev *hdev, struct sk_buff *skb)
         hci_dev_unlock(hdev);
 }
 
+static void hci_cc_read_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
+{
+        struct hci_rp_read_link_policy *rp = (void *) skb->data;
+        struct hci_conn *conn;
+
+        BT_DBG("%s status 0x%x", hdev->name, rp->status);
+
+        if (rp->status)
+                return;
+
+        hci_dev_lock(hdev);
+
+        conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+        if (conn)
+                conn->link_policy = __le16_to_cpu(rp->policy);
+
+        hci_dev_unlock(hdev);
+}
+
 static void hci_cc_write_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
 {
         struct hci_rp_write_link_policy *rp = (void *) skb->data;
@@ -128,13 +147,41 @@ static void hci_cc_write_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
         hci_dev_lock(hdev);
 
         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
-        if (conn) {
+        if (conn)
                 conn->link_policy = get_unaligned_le16(sent + 2);
-        }
 
         hci_dev_unlock(hdev);
 }
 
+static void hci_cc_read_def_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
+{
+        struct hci_rp_read_def_link_policy *rp = (void *) skb->data;
+
+        BT_DBG("%s status 0x%x", hdev->name, rp->status);
+
+        if (rp->status)
+                return;
+
+        hdev->link_policy = __le16_to_cpu(rp->policy);
+}
+
+static void hci_cc_write_def_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
+{
+        __u8 status = *((__u8 *) skb->data);
+        void *sent;
+
+        BT_DBG("%s status 0x%x", hdev->name, status);
+
+        sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
+        if (!sent)
+                return;
+
+        if (!status)
+                hdev->link_policy = get_unaligned_le16(sent);
+
+        hci_req_complete(hdev, status);
+}
+
 static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
 {
         __u8 status = *((__u8 *) skb->data);
@@ -347,8 +394,8 @@ static void hci_cc_read_local_version(struct hci_dev *hdev, struct sk_buff *skb)
                 return;
 
         hdev->hci_ver = rp->hci_ver;
-        hdev->hci_rev = btohs(rp->hci_rev);
-        hdev->manufacturer = btohs(rp->manufacturer);
+        hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
+        hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
 
         BT_DBG("%s manufacturer %d hci ver %d:%d", hdev->name,
                                         hdev->manufacturer,
@@ -690,14 +737,6 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s
                         hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES, sizeof(cp), &cp);
                 }
 
-                /* Set link policy */
-                if (conn->type == ACL_LINK && hdev->link_policy) {
-                        struct hci_cp_write_link_policy cp;
-                        cp.handle = ev->handle;
-                        cp.policy = cpu_to_le16(hdev->link_policy);
-                        hci_send_cmd(hdev, HCI_OP_WRITE_LINK_POLICY, sizeof(cp), &cp);
-                }
-
                 /* Set packet type for incoming connection */
                 if (!conn->out && hdev->hci_ver < 3) {
                         struct hci_cp_change_conn_ptype cp;
@@ -974,10 +1013,22 @@ static inline void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *sk
                 hci_cc_role_discovery(hdev, skb);
                 break;
 
+        case HCI_OP_READ_LINK_POLICY:
+                hci_cc_read_link_policy(hdev, skb);
+                break;
+
         case HCI_OP_WRITE_LINK_POLICY:
                 hci_cc_write_link_policy(hdev, skb);
                 break;
 
+        case HCI_OP_READ_DEF_LINK_POLICY:
+                hci_cc_read_def_link_policy(hdev, skb);
+                break;
+
+        case HCI_OP_WRITE_DEF_LINK_POLICY:
+                hci_cc_write_def_link_policy(hdev, skb);
+                break;
+
         case HCI_OP_RESET:
                 hci_cc_reset(hdev, skb);
                 break;