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Bluetooth: Resume advertising after LE connection

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When an LE connection request is made, advertising is disabled and never
resumed. When a client has an active advertisement, this is disruptive.
This change adds resume logic for client-configured (non-directed)
advertisements after the connection attempt.

The patch was tested by registering an advertisement, initiating an LE
connection from a remote peer, and verifying that the advertisement is
re-activated after the connection is established. This is performed on
Hatch and Kukui Chromebooks.

Signed-off-by: Daniel Winkler <danielwinkler@google.com>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Daniel Winkler 2020-11-06 15:20:19 -08:00 • committed by Marcel Holtmann
parent f7e0e8b2f1
commit 2943d8ede3
3 changed files with 28 additions and 7 deletions
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12
net/bluetooth/hci_conn.c
View file

@ -758,6 +758,9 @@ static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
conn = hci_lookup_le_connect(hdev);
if (hdev->adv_instance_cnt)
hci_req_resume_adv_instances(hdev);
if (!status) {
hci_connect_le_scan_cleanup(conn);
goto done;
@ -1067,10 +1070,11 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
* connections most controllers will refuse to connect if
* advertising is enabled, and for slave role connections we
* anyway have to disable it in order to start directed
* advertising.
* advertising. Any registered advertisements will be
* re-enabled after the connection attempt is finished.
*/
if (hci_dev_test_flag(hdev, HCI_LE_ADV))
__hci_req_disable_advertising(&req);
__hci_req_pause_adv_instances(&req);
/* If requested to connect as slave use directed advertising */
if (conn->role == HCI_ROLE_SLAVE) {
@ -1118,6 +1122,10 @@ create_conn:
err = hci_req_run(&req, create_le_conn_complete);
if (err) {
hci_conn_del(conn);
if (hdev->adv_instance_cnt)
hci_req_resume_adv_instances(hdev);
return ERR_PTR(err);
}

21
net/bluetooth/hci_request.c
View file

@ -1123,9 +1123,9 @@ static void cancel_adv_timeout(struct hci_dev *hdev)
}
/* This function requires the caller holds hdev->lock */
static void hci_suspend_adv_instances(struct hci_request *req)
void __hci_req_pause_adv_instances(struct hci_request *req)
{
bt_dev_dbg(req->hdev, "Suspending advertising instances");
bt_dev_dbg(req->hdev, "Pausing advertising instances");
/* Call to disable any advertisements active on the controller.
* This will succeed even if no advertisements are configured.
@ -1138,7 +1138,7 @@ static void hci_suspend_adv_instances(struct hci_request *req)
}
/* This function requires the caller holds hdev->lock */
static void hci_resume_adv_instances(struct hci_request *req)
static void __hci_req_resume_adv_instances(struct hci_request *req)
{
struct adv_info *adv;
@ -1161,6 +1161,17 @@ static void hci_resume_adv_instances(struct hci_request *req)
}
}
/* This function requires the caller holds hdev->lock */
int hci_req_resume_adv_instances(struct hci_dev *hdev)
{
struct hci_request req;
hci_req_init(&req, hdev);
__hci_req_resume_adv_instances(&req);
return hci_req_run(&req, NULL);
}
static void suspend_req_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
bt_dev_dbg(hdev, "Request complete opcode=0x%x, status=0x%x", opcode,
@ -1214,7 +1225,7 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
/* Pause other advertisements */
if (hdev->adv_instance_cnt)
hci_suspend_adv_instances(&req);
__hci_req_pause_adv_instances(&req);
hdev->advertising_paused = true;
hdev->advertising_old_state = old_state;
@ -1279,7 +1290,7 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
/* Resume other advertisements */
if (hdev->adv_instance_cnt)
hci_resume_adv_instances(&req);
__hci_req_resume_adv_instances(&req);
/* Unpause discovery */
hdev->discovery_paused = false;

2
net/bluetooth/hci_request.h
View file

@ -71,6 +71,8 @@ void hci_req_add_le_passive_scan(struct hci_request *req);
void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next);
void hci_req_disable_address_resolution(struct hci_dev *hdev);
void __hci_req_pause_adv_instances(struct hci_request *req);
int hci_req_resume_adv_instances(struct hci_dev *hdev);
void hci_req_reenable_advertising(struct hci_dev *hdev);
void __hci_req_enable_advertising(struct hci_request *req);
void __hci_req_disable_advertising(struct hci_request *req);