[Bluetooth] Support concurrent connect requests

Most Bluetooth chips don't support concurrent connect requests, because
this would involve a multiple baseband page with only one radio. In the
case an upper layer like L2CAP requests a concurrent connect these chips
return the error "Command Disallowed" for the second request. If this
happens it the responsibility of the Bluetooth core to queue the request
and try again after the previous connect attempt has been completed.

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

1 files changed, 17 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index df22efcfcc0b..c0fc39620f36 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -153,6 +153,7 @@ struct hci_conn {
         __u8             mode;
         __u8             type;
         __u8             out;
+        __u8             attempt;
         __u8             dev_class[3];
         __u8             features[8];
         __u16            interval;
@@ -289,6 +290,22 @@ static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
         return NULL;
 }
 
+static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
+                                        __u8 type, __u16 state)
+{
+        struct hci_conn_hash *h = &hdev->conn_hash;
+        struct list_head *p;
+        struct hci_conn  *c;
+
+        list_for_each(p, &h->list) {
+                c = list_entry(p, struct hci_conn, list);
+                if (c->type == type && c->state == state)
+                        return c;
+        }
+        return NULL;
+}
+
+void hci_acl_connect(struct hci_conn *conn);
 void hci_acl_disconn(struct hci_conn *conn, __u8 reason);
 void hci_add_sco(struct hci_conn *conn, __u16 handle);