Bluetooth: Add le_scan_restart work for LE scan restarting

Currently there is no way to restart le scan, and it's needed in
service scan method. The way it work: it disable, and then enable le
scan on controller.

During the restart, we must remember when the scan was started, and
it's duration, to later re-schedule the le_scan_disable work, that was
stopped during the stop scan phase.

Signed-off-by: Jakub Pawlowski <jpawlowski@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index a37e10f4e2b3..d3a232be9d9b 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -79,6 +79,8 @@ struct discovery_state {
         s8                      rssi;
         u16                     uuid_count;
         u8                      (*uuids)[16];
+        unsigned long           scan_start;
+        unsigned long           scan_duration;
 };
 
 struct hci_conn_hash {
@@ -354,6 +356,7 @@ struct hci_dev {
         unsigned long           dev_flags;
 
         struct delayed_work     le_scan_disable;
+        struct delayed_work     le_scan_restart;
 
         __s8                    adv_tx_power;
         __u8                    adv_data[HCI_MAX_AD_LENGTH];
@@ -531,6 +534,8 @@ static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
         hdev->discovery.uuid_count = 0;
         kfree(hdev->discovery.uuids);
         hdev->discovery.uuids = NULL;
+        hdev->discovery.scan_start = 0;
+        hdev->discovery.scan_duration = 0;
 }
 
 bool hci_discovery_active(struct hci_dev *hdev);