From e73439d8c0e4c522c843b8bb98c0eb5700da6b05 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Mon, 26 Jul 2010 10:06:00 -0400 Subject: Bluetooth: Defer SCO setup if mode change is pending Certain headsets such as the Motorola H350 will reject SCO and eSCO connection requests while the ACL is transitioning from sniff mode to active mode. Add synchronization so that SCO and eSCO connection requests will wait until the ACL has fully transitioned to active mode. < HCI Command: Exit Sniff Mode (0x02|0x0004) plen 2 handle 12 > HCI Event: Command Status (0x0f) plen 4 Exit Sniff Mode (0x02|0x0004) status 0x00 ncmd 1 < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 handle 12 voice setting 0x0040 > HCI Event: Command Status (0x0f) plen 4 Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1 > HCI Event: Number of Completed Packets (0x13) plen 5 handle 12 packets 1 > HCI Event: Mode Change (0x14) plen 6 status 0x00 handle 12 mode 0x00 interval 0 Mode: Active > HCI Event: Synchronous Connect Complete (0x2c) plen 17 status 0x10 handle 14 bdaddr 00:1A:0E:50:28:A4 type SCO Error: Connection Accept Timeout Exceeded Signed-off-by: Ron Shaffer Signed-off-by: Marcel Holtmann --- net/bluetooth/hci_conn.c | 32 ++++++++++++++++++++++++++++---- net/bluetooth/hci_event.c | 31 +++++++++++++++---------------- 2 files changed, 43 insertions(+), 20 deletions(-) (limited to 'net/bluetooth') diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index e9fef83449f8..0b1e460fe440 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -155,6 +155,27 @@ void hci_setup_sync(struct hci_conn *conn, __u16 handle) hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp); } +/* Device _must_ be locked */ +void hci_sco_setup(struct hci_conn *conn, __u8 status) +{ + struct hci_conn *sco = conn->link; + + BT_DBG("%p", conn); + + if (!sco) + return; + + if (!status) { + if (lmp_esco_capable(conn->hdev)) + hci_setup_sync(sco, conn->handle); + else + hci_add_sco(sco, conn->handle); + } else { + hci_proto_connect_cfm(sco, status); + hci_conn_del(sco); + } +} + static void hci_conn_timeout(unsigned long arg) { struct hci_conn *conn = (void *) arg; @@ -385,10 +406,13 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8 acl->power_save = 1; hci_conn_enter_active_mode(acl); - if (lmp_esco_capable(hdev)) - hci_setup_sync(sco, acl->handle); - else - hci_add_sco(sco, acl->handle); + if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->pend)) { + /* defer SCO setup until mode change completed */ + set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->pend); + return sco; + } + + hci_sco_setup(acl, 0x00); } return sco; diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 2069c3b05fda..bfef5bae0b3a 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -785,9 +785,13 @@ static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status) hci_dev_lock(hdev); conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); - if (conn) + if (conn) { clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend); + if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->pend)) + hci_sco_setup(conn, status); + } + hci_dev_unlock(hdev); } @@ -808,9 +812,13 @@ static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status) hci_dev_lock(hdev); conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); - if (conn) + if (conn) { clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend); + if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->pend)) + hci_sco_setup(conn, status); + } + hci_dev_unlock(hdev); } @@ -915,20 +923,8 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s } else conn->state = BT_CLOSED; - if (conn->type == ACL_LINK) { - struct hci_conn *sco = conn->link; - if (sco) { - if (!ev->status) { - if (lmp_esco_capable(hdev)) - hci_setup_sync(sco, conn->handle); - else - hci_add_sco(sco, conn->handle); - } else { - hci_proto_connect_cfm(sco, ev->status); - hci_conn_del(sco); - } - } - } + if (conn->type == ACL_LINK) + hci_sco_setup(conn, ev->status); if (ev->status) { hci_proto_connect_cfm(conn, ev->status); @@ -1481,6 +1477,9 @@ static inline void hci_mode_change_evt(struct hci_dev *hdev, struct sk_buff *skb else conn->power_save = 0; } + + if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->pend)) + hci_sco_setup(conn, ev->status); } hci_dev_unlock(hdev); -- cgit v1.2.2