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[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>
This commit is contained in:
Marcel Holtmann 2006-10-15 17:30:56 +02:00 committed by David S. Miller
parent e9c4bec63e
commit 4c67bc74f0
4 changed files with 33 additions and 7 deletions
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17
include/net/bluetooth/hci_core.h
View File

@ -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);

2
net/bluetooth/af_bluetooth.c
View File

@ -48,7 +48,7 @@
#define BT_DBG(D...)
#endif
#define VERSION "2.10"
#define VERSION "2.11"
/* Bluetooth sockets */
#define BT_MAX_PROTO 8

6
net/bluetooth/hci_conn.c
View File

@ -51,7 +51,7 @@
#define BT_DBG(D...)
#endif
static void hci_acl_connect(struct hci_conn *conn)
void hci_acl_connect(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
struct inquiry_entry *ie;
@ -63,6 +63,8 @@ static void hci_acl_connect(struct hci_conn *conn)
conn->out = 1;
conn->link_mode = HCI_LM_MASTER;
conn->attempt++;
memset(&cp, 0, sizeof(cp));
bacpy(&cp.bdaddr, &conn->dst);
cp.pscan_rep_mode = 0x02;
@ -80,7 +82,7 @@ static void hci_acl_connect(struct hci_conn *conn)
cp.role_switch = 0x01;
else
cp.role_switch = 0x00;
hci_send_cmd(hdev, OGF_LINK_CTL, OCF_CREATE_CONN, sizeof(cp), &cp);
}

15
net/bluetooth/hci_event.c
View File

@ -414,9 +414,12 @@ static inline void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
if (status) {
if (conn && conn->state == BT_CONNECT) {
conn->state = BT_CLOSED;
hci_proto_connect_cfm(conn, status);
hci_conn_del(conn);
if (status != 0x0c || conn->attempt > 2) {
conn->state = BT_CLOSED;
hci_proto_connect_cfm(conn, status);
hci_conn_del(conn);
} else
conn->state = BT_CONNECT2;
}
} else {
if (!conn) {
@ -728,7 +731,7 @@ static inline void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *sk
static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_conn_complete *ev = (struct hci_ev_conn_complete *) skb->data;
struct hci_conn *conn;
struct hci_conn *conn, *pend;
BT_DBG("%s", hdev->name);
@ -801,6 +804,10 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s
if (ev->status)
hci_conn_del(conn);
pend = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
if (pend)
hci_acl_connect(pend);
hci_dev_unlock(hdev);
}