Bluetooth: Advertising entries lifetime

This patch adds a timer to clear 'adv_entries' after three minutes.

After some amount of time, the advertising entries cached during
the last LE scan should be considered expired and they should be
removed from the advertising cache.

It was chosen a three minutes timeout as an initial attempt. This
value might change in future.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 056f7b2fa02f..a90200cac11d 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -856,8 +856,12 @@ static void hci_cc_le_set_scan_enable(struct hci_dev *hdev,
 
         hci_dev_lock(hdev);
 
-        if (cp->enable == 0x01)
+        if (cp->enable == 0x01) {
+                del_timer(&hdev->adv_timer);
                 hci_adv_entries_clear(hdev);
+        } else if (cp->enable == 0x00) {
+                mod_timer(&hdev->adv_timer, jiffies + ADV_CLEAR_TIMEOUT);
+        }
 
         hci_dev_unlock(hdev);
 }