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Bluetooth: Perform HCI update for power on synchronously

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The request to update HCI during power on is always coming either from
hdev->req_workqueue or through an ioctl, so it's safe to use
hci_req_sync for it. This way we also eliminate potential races with
incoming mgmt commands or other actions while powering on.

Part of this refactoring is the splitting of mgmt_powered() into
mgmt_power_on() and __mgmt_power_off() functions. The main reason is
the different requirements as far as hdev locking is concerned, as
highlighted with the __ prefix of the power off API.

Since the power on in the case of clearing the AUTO_OFF flag cannot be
done synchronously in the set_powered mgmt handler, the hci_power_on
work callback is extended to cover this (which also simplifies the
set_powered helper a lot).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg
2015-11-25 16:15:44 +02:00
committed by Marcel Holtmann
parent bf943cbf76
commit 2ff13894cf
5 changed files with 129 additions and 135 deletions
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100
net/bluetooth/hci_request.c
View File

@@ -2181,6 +2181,106 @@ static void discov_off(struct work_struct *work)
mgmt_new_settings(hdev);
}
static int powered_update_hci(struct hci_request *req, unsigned long opt)
{
struct hci_dev *hdev = req->hdev;
struct adv_info *adv_instance;
u8 link_sec;
hci_dev_lock(hdev);
if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
!lmp_host_ssp_capable(hdev)) {
u8 mode = 0x01;
hci_req_add(req, HCI_OP_WRITE_SSP_MODE, sizeof(mode), &mode);
if (bredr_sc_enabled(hdev) && !lmp_host_sc_capable(hdev)) {
u8 support = 0x01;
hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
sizeof(support), &support);
}
}
if (hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
lmp_bredr_capable(hdev)) {
struct hci_cp_write_le_host_supported cp;
cp.le = 0x01;
cp.simul = 0x00;
/* Check first if we already have the right
* host state (host features set)
*/
if (cp.le != lmp_host_le_capable(hdev) ||
cp.simul != lmp_host_le_br_capable(hdev))
hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED,
sizeof(cp), &cp);
}
if (lmp_le_capable(hdev)) {
/* Make sure the controller has a good default for
* advertising data. This also applies to the case
* where BR/EDR was toggled during the AUTO_OFF phase.
*/
if (hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
(hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
!hci_dev_test_flag(hdev, HCI_ADVERTISING_INSTANCE))) {
__hci_req_update_adv_data(req, HCI_ADV_CURRENT);
__hci_req_update_scan_rsp_data(req, HCI_ADV_CURRENT);
}
if (hci_dev_test_flag(hdev, HCI_ADVERTISING_INSTANCE) &&
hdev->cur_adv_instance == 0x00 &&
!list_empty(&hdev->adv_instances)) {
adv_instance = list_first_entry(&hdev->adv_instances,
struct adv_info, list);
hdev->cur_adv_instance = adv_instance->instance;
}
if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
__hci_req_enable_advertising(req);
else if (hci_dev_test_flag(hdev, HCI_ADVERTISING_INSTANCE) &&
hdev->cur_adv_instance)
__hci_req_schedule_adv_instance(req,
hdev->cur_adv_instance,
true);
}
link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
if (link_sec != test_bit(HCI_AUTH, &hdev->flags))
hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE,
sizeof(link_sec), &link_sec);
if (lmp_bredr_capable(hdev)) {
if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
__hci_req_write_fast_connectable(req, true);
else
__hci_req_write_fast_connectable(req, false);
__hci_req_update_scan(req);
__hci_req_update_class(req);
__hci_req_update_name(req);
__hci_req_update_eir(req);
}
hci_dev_unlock(hdev);
return 0;
}
int __hci_req_hci_power_on(struct hci_dev *hdev)
{
/* Register the available SMP channels (BR/EDR and LE) only when
* successfully powering on the controller. This late
* registration is required so that LE SMP can clearly decide if
* the public address or static address is used.
*/
smp_register(hdev);
return __hci_req_sync(hdev, powered_update_hci, 0, HCI_CMD_TIMEOUT,
NULL);
}
void hci_request_setup(struct hci_dev *hdev)
{
INIT_WORK(&hdev->discov_update, discov_update);