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Patch "Bluetooth: Use continuous scanning when creating LE connections" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Mar 1, 2016

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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 <[email protected]> know about it.

Quoted 1 line

From 2f99536a5b34d5b0f54723067d68f6cef3f0fdc6 Mon Sep 17 00:00:00 2001

From: Johan Hedberg <[email protected]>
Date: Thu, 3 Dec 2015 12:45:19 +0200
Subject: Bluetooth: Use continuous scanning when creating LE connections

From: Johan Hedberg <[email protected]>

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.

---
 net/bluetooth/hci_conn.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
net/bluetooth/hci_conn.c +5 -1
@@ -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 [email protected] 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