@@ -534,7 +534,6 @@ struct hci_dev {
struct work_struct tx_work;
struct delayed_work le_scan_disable;
- struct delayed_work le_scan_restart;
struct sk_buff_head rx_q;
struct sk_buff_head raw_q;
@@ -348,8 +348,6 @@ static void le_scan_disable(struct work_struct *work)
if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
goto _return;
- cancel_delayed_work(&hdev->le_scan_restart);
-
status = hci_cmd_sync_queue(hdev, scan_disable_sync, NULL, NULL);
if (status) {
bt_dev_err(hdev, "failed to disable LE scan: %d", status);
@@ -397,71 +395,6 @@ static void le_scan_disable(struct work_struct *work)
static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
u8 filter_dup);
-static int hci_le_scan_restart_sync(struct hci_dev *hdev)
-{
- /* If controller is not scanning we are done. */
- if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
- return 0;
-
- if (hdev->scanning_paused) {
- bt_dev_dbg(hdev, "Scanning is paused for suspend");
- return 0;
- }
-
- hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
- return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE,
- LE_SCAN_FILTER_DUP_ENABLE);
-}
-
-static void le_scan_restart(struct work_struct *work)
-{
- struct hci_dev *hdev = container_of(work, struct hci_dev,
- le_scan_restart.work);
- unsigned long timeout, duration, scan_start, now;
- int status;
-
- bt_dev_dbg(hdev, "");
-
- status = hci_le_scan_restart_sync(hdev);
- if (status) {
- bt_dev_err(hdev, "failed to restart LE scan: status %d",
- status);
- return;
- }
-
- hci_dev_lock(hdev);
-
- if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
- !hdev->discovery.scan_start)
- goto unlock;
-
- /* When the scan was started, hdev->le_scan_disable has been queued
- * after duration from scan_start. During scan restart this job
- * has been canceled, and we need to queue it again after proper
- * timeout, to make sure that scan does not run indefinitely.
- */
- duration = hdev->discovery.scan_duration;
- scan_start = hdev->discovery.scan_start;
- now = jiffies;
- if (now - scan_start <= duration) {
- int elapsed;
-
- if (now >= scan_start)
- elapsed = now - scan_start;
- else
- elapsed = ULONG_MAX - scan_start + now;
-
- timeout = duration - elapsed;
- } else {
- timeout = 0;
- }
-
- queue_delayed_work(hdev->req_workqueue,
- &hdev->le_scan_disable, timeout);
-
-unlock:
- hci_dev_unlock(hdev);
-}
static int reenable_adv_sync(struct hci_dev *hdev, void *data)
{
@@ -630,7 +563,6 @@ void hci_cmd_sync_init(struct hci_dev *hdev)
INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
- INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart);
INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
}
@@ -4960,7 +4892,6 @@ int hci_dev_close_sync(struct hci_dev *hdev)
cancel_delayed_work(&hdev->power_off);
cancel_delayed_work(&hdev->ncmd_timer);
cancel_delayed_work(&hdev->le_scan_disable);
- cancel_delayed_work(&hdev->le_scan_restart);
hci_request_cancel_all(hdev);
@@ -5178,7 +5109,6 @@ int hci_stop_discovery_sync(struct hci_dev *hdev)
if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
cancel_delayed_work(&hdev->le_scan_disable);
- cancel_delayed_work(&hdev->le_scan_restart);
err = hci_scan_disable_sync(hdev);
if (err)
@@ -5686,19 +5616,18 @@ static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
if (err < 0)
own_addr_type = ADDR_LE_DEV_PUBLIC;
- if (hci_is_adv_monitoring(hdev)) {
+ if (hci_is_adv_monitoring(hdev) ||
+ (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
+ hdev->discovery.result_filtering)) {
/* Duplicate filter should be disabled when some advertisement
* monitor is activated, otherwise AdvMon can only receive one
* advertisement for one peer(*) during active scanning, and
* might report loss to these peers.
*
- * Note that different controllers have different meanings of
- * |duplicate|. Some of them consider packets with the same
- * address as duplicate, and others consider packets with the
- * same address and the same RSSI as duplicate. Although in the
- * latter case we don't need to disable duplicate filter, but
- * it is common to have active scanning for a short period of
- * time, the power impact should be neglectable.
+ * If controller does strict duplicate filtering and the
+ * discovery requires result filtering disables controller based
+ * filtering since that can cause reports that would match the
+ * host filter to not be reported.
*/
filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
}
@@ -5778,17 +5707,6 @@ int hci_start_discovery_sync(struct hci_dev *hdev)
bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
- /* When service discovery is used and the controller has a
- * strict duplicate filter, it is important to remember the
- * start and duration of the scan. This is required for
- * restarting scanning during the discovery phase.
- */
- if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
- hdev->discovery.result_filtering) {
- hdev->discovery.scan_start = jiffies;
- hdev->discovery.scan_duration = timeout;
- }
-
queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
timeout);
return 0;
@@ -10134,21 +10134,6 @@ static bool eir_has_uuids(u8 *eir, u16 eir_len, u16 uuid_count, u8 (*uuids)[16])
return false;
}
-static void restart_le_scan(struct hci_dev *hdev)
-{
- /* If controller is not scanning we are done. */
- if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
- return;
-
- if (time_after(jiffies + DISCOV_LE_RESTART_DELAY,
- hdev->discovery.scan_start +
- hdev->discovery.scan_duration))
- return;
-
- queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_restart,
- DISCOV_LE_RESTART_DELAY);
-}
-
static bool is_filter_match(struct hci_dev *hdev, s8 rssi, u8 *eir,
u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len)
{
@@ -10183,8 +10168,6 @@ static bool is_filter_match(struct hci_dev *hdev, s8 rssi, u8 *eir,
* scanning to ensure updated result with updated RSSI values.
*/
if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks)) {
- restart_le_scan(hdev);
-
/* Validate RSSI value against the RSSI threshold once more. */
if (hdev->discovery.rssi != HCI_RSSI_INVALID &&
rssi < hdev->discovery.rssi)