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Bluetooth: Filter duplicated reports in LE scan

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This patch enables filtering duplicated advertising reports during
LE scan.

Some LE devices advertise using very small intervals generating lots
of equal advertising report events to the host. Each event generates
a mgmt_device_found event which is copied to userspace.

Enabling this feature, duplicated advertising reports are filtered
at controller's link layer. This way, the controller doesn't wake up
the host to report duplicated advertising reports and, consequently,
less data is copied to userspace.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Andre Guedes 2012-05-31 20:01:41 -03:00 • committed by Johan Hedberg
parent 7e1af8a3a5
commit 0431a43ca5
1 changed files with 1 additions and 0 deletions
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net/bluetooth/hci_core.c
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@ -1526,6 +1526,7 @@ static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
memset(&cp, 0, sizeof(cp));
cp.enable = 1;
cp.filter_dup = 1;
hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
}