Bluetooth: Run page scan updates through hdev->req_workqueue
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>
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 3d9d2e4..0d20e13 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1810,7 +1810,7 @@
* entries.
*/
hci_req_init(&req, hdev);
- __hci_update_page_scan(&req);
+ __hci_req_update_scan(&req);
update_class(&req);
hci_req_run(&req, NULL);
@@ -2058,7 +2058,7 @@
if (conn_changed || discov_changed) {
new_settings(hdev, cmd->sk);
- hci_update_page_scan(hdev);
+ hci_req_update_scan(hdev);
if (discov_changed)
mgmt_update_adv_data(hdev);
hci_update_background_scan(hdev);
@@ -2092,7 +2092,7 @@
return err;
if (changed) {
- hci_update_page_scan(hdev);
+ hci_req_update_scan(hdev);
hci_update_background_scan(hdev);
return new_settings(hdev, sk);
}
@@ -5041,7 +5041,7 @@
hci_req_init(&req, hdev);
write_fast_connectable(&req, false);
- __hci_update_page_scan(&req);
+ __hci_req_update_scan(&req);
/* Since only the advertising data flags will change, there
* is no need to update the scan response data.
@@ -5927,7 +5927,7 @@
if (err)
goto unlock;
- hci_update_page_scan(hdev);
+ hci_req_update_scan(hdev);
goto added;
}
@@ -6024,7 +6024,7 @@
goto unlock;
}
- hci_update_page_scan(hdev);
+ hci_req_update_scan(hdev);
device_removed(sk, hdev, &cp->addr.bdaddr,
cp->addr.type);
@@ -6089,7 +6089,7 @@
kfree(b);
}
- hci_update_page_scan(hdev);
+ hci_req_update_scan(hdev);
list_for_each_entry_safe(p, tmp, &hdev->le_conn_params, list) {
if (p->auto_connect == HCI_AUTO_CONN_DISABLED)
@@ -7397,7 +7397,7 @@
write_fast_connectable(&req, true);
else
write_fast_connectable(&req, false);
- __hci_update_page_scan(&req);
+ __hci_req_update_scan(&req);
update_class(&req);
update_name(&req);
update_eir(&req);