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Bluetooth: Run page scan updates through hdev->req_workqueue

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Since Add/Remove Device perform the page scan updates independently
from the HCI command completion we've introduced a potential race when
multiple mgmt commands are queued. Doing the page scan updates through
the req_workqueue ensures that the state changes are performed in a
race-free manner.

At the same time, to make the request helper more widely usable,
extend it to also cover Inquiry Scan changes since those are behind
the same HCI command. This is also reflected in the new name of the
API as well as the work struct name.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2015-11-16 12:52:21 +02:00 • committed by Marcel Holtmann
parent ad2c8c73d2
commit 01b1cb87d3
5 changed files with 35 additions and 21 deletions
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8
net/bluetooth/hci_request.h
View file

@ -61,8 +61,12 @@ void hci_req_add_le_passive_scan(struct hci_request *req);
/* Returns true if HCI commands were queued */
bool hci_req_stop_discovery(struct hci_request *req);
void hci_update_page_scan(struct hci_dev *hdev);
void __hci_update_page_scan(struct hci_request *req);
static inline void hci_req_update_scan(struct hci_dev *hdev)
{
queue_work(hdev->req_workqueue, &hdev->scan_update);
}
void __hci_req_update_scan(struct hci_request *req);
int hci_update_random_address(struct hci_request *req, bool require_privacy,
u8 *own_addr_type);