| From ed9950ac7d2b9fd655ae31d441bfb86b7a62149f Mon Sep 17 00:00:00 2001 |
| From: Manish Mandlik <mmandlik@google.com> |
| Date: Fri, 3 Jun 2022 14:38:26 -0700 |
| Subject: [PATCH] CHROMIUM: Bluetooth: hci_sync: Disable filter dup when adv |
| monitoring |
| |
| SW based filtering requires all advertisement reports to perform RSSI |
| based filtering. So, disable filter duplicates while scanning for |
| advertisement monitoring. |
| |
| Fixes: 9ca7b6b1cc20 ("Bluetooth: hci_sync: Make use of hci_cmd_sync_queue set 3") |
| |
| Note: This will be upstream'd later. Submitting as a CHROMIUM patch to get this merged into M104 on time. |
| Signed-off-by: Manish Mandlik <mmandlik@google.com> |
| |
| BUG=b:234869005 |
| TEST=Run AdvMonitor tests on dedede with RTL |
| |
| Signed-off-by: Zhengping Jiang <jiangzhp@google.com> |
| --- |
| net/bluetooth/hci_sync.c | 14 ++++++++++++++ |
| 1 file changed, 14 insertions(+) |
| |
| diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c |
| index b180c0fff709f0ae2a68c85346dd8d5159fe3b7e..79cc35d0fc5fcc61bdb654f6d9e9a9e40151700d 100644 |
| --- a/net/bluetooth/hci_sync.c |
| +++ b/net/bluetooth/hci_sync.c |
| @@ -2664,6 +2664,20 @@ static int hci_passive_scan_sync(struct hci_dev *hdev) |
| } else if (hci_is_adv_monitoring(hdev)) { |
| window = hdev->le_scan_window_adv_monitor; |
| interval = hdev->le_scan_int_adv_monitor; |
| + |
| + /* Disable duplicates filter when scanning for advertisement |
| + * monitor for the following reasons. |
| + * |
| + * For HW pattern filtering (ex. MSFT), Realtek and Qualcomm |
| + * controllers ignore RSSI_Sampling_Period when the duplicates |
| + * filter is enabled. |
| + * |
| + * For SW pattern filtering, when we're not doing interleaved |
| + * scanning, it is necessary to disable duplicates filter, |
| + * otherwise hosts can only receive one advertisement and it's |
| + * impossible to know if a peer is still in range. |
| + */ |
| + filter_dups = LE_SCAN_FILTER_DUP_DISABLE; |
| } else { |
| window = hdev->le_scan_window; |
| interval = hdev->le_scan_interval; |
| -- |
| 2.38.1.584.g0f3c55d4c2-goog |
| |
