| Message ID | 20211115135114.2763223-1-alainm@chromium.org |
|---|---|
| State | New |
| Headers | show |
| Series | Bluetooth: Fix adv set removal processing. | expand |
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index d4b75a6cfeee..52161d04136f 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -1385,14 +1385,16 @@ static void hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, if (adv->enabled) goto unlock; } - } else { + + hci_dev_clear_flag(hdev, HCI_LE_ADV); + } else if (!cp->num_of_sets || !set->handle) { /* All instances shall be considered disabled */ list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) adv->enabled = false; - } - hci_dev_clear_flag(hdev, HCI_LE_ADV); + hci_dev_clear_flag(hdev, HCI_LE_ADV); + } } unlock:
When multiple advertisement sets are active and a single instance is removed, the processing of hci_cc_le_set_ext_adv_enable will result in considering all advertisements as disabled since the instance has already been removed from the list. The fix is to use the command parameters to validate the intent rather than making an assumption based on the validity of the adv set. remove_advertising() hci0 hci_req_add_ev() hci0 opcode 0x2039 plen 6 hci_req_add_ev() hci0 opcode 0x203c plen 1 hci_remove_adv_instance() hci0 removing 2MR <-- This removes instance 2 from the adv_instances list hci_cc_le_set_ext_adv_enable() hci0 status 0x00 hci_sent_cmd_data() hci0 opcode 0x2039 hci_cc_le_set_ext_adv_enable() adv instance 0, enabled 0 <-- This incorrectly assumes that all instances are being disabled while only handle 2 is being disabled. hci_cc_le_set_ext_adv_enable() adv instance list status - before hci_cc_le_set_ext_adv_enable() adv instance 3 is 1 hci_cc_le_set_ext_adv_enable() adv instance 1 is 1 hci_cc_le_set_ext_adv_enable() HCI_LE_ADV state before: 1 hci_cc_le_set_ext_adv_enable() adv instance list status - after hci_cc_le_set_ext_adv_enable() adv instance 3 is 0 hci_cc_le_set_ext_adv_enable() adv instance 1 is 0 hci_cc_le_set_ext_adv_enable() HCI_LE_ADV state after: 0 <-- This is incorrect since handle 1 and 3 are still enabled in the controller The fix was validated by running the ChromeOS bluetooth_AdapterAdvHealth test suite. Reviewed-by: mcchou@chromium.org Signed-off-by: Alain Michaud <alainm@chromium.org> --- net/bluetooth/hci_event.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)