This is a note to let you know that I've just added the patch titled
Bluetooth: Use continuous scanning when creating LE connections
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-use-continuous-scanning-when-creating-le-connections.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2f99536a5b34d5b0f54723067d68f6cef3f0fdc6 Mon Sep 17 00:00:00 2001
From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
Date: Thu, 3 Dec 2015 12:45:19 +0200
Subject: Bluetooth: Use continuous scanning when creating LE connections
From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
commit 2f99536a5b34d5b0f54723067d68f6cef3f0fdc6 upstream.
All LE connections are now triggered through a preceding passive scan
and waiting for a connectable advertising report. This means we've got
the best possible guarantee that the device is within range and should
be able to request the controller to perform continuous scanning. This
way we minimize the risk that we miss out on any advertising packets.
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/bluetooth/hci_conn.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -722,8 +722,12 @@ static void hci_req_add_le_create_conn(s
if (hci_update_random_address(req, false, &own_addr_type))
return;
+ /* Set window to be the same value as the interval to enable
+ * continuous scanning.
+ */
cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
- cp.scan_window = cpu_to_le16(hdev->le_scan_window);
+ cp.scan_window = cp.scan_interval;
+
bacpy(&cp.peer_addr, &conn->dst);
cp.peer_addr_type = conn->dst_type;
cp.own_address_type = own_addr_type;
Patches currently in stable-queue which might be from johan.hedberg@xxxxxxxxx are
queue-4.4/bluetooth-6lowpan-fix-kernel-null-pointer-dereferences.patch
queue-4.4/bluetooth-fix-incorrect-removing-of-irks.patch
queue-4.4/bluetooth-use-continuous-scanning-when-creating-le-connections.patch
queue-4.4/bluetooth-6lowpan-fix-handling-of-uncompressed-ipv6-packets.patch
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