Commit 83ce9a06 authored Jun 28, 2012 by Johan Hedberg Committed by Gustavo Padovan Jul 16, 2012

Bluetooth: Change page scan interval in fast connectable mode



This patch is based on a user space (hciops) patch which never made it
upstream but does make sense to include in the mgmt part of the kernel.

(User space) commit message from Dmitriy Paliy:
"
Page scan interval in fast connectable mode is changed from 22.5 msec to
160 msec to perform less aggressive page scanning. This is done
accordingly to controller vendor recommendation.

Primary concern is that current parameters 22.5 interval, 11.25 window,
and interleaved scanning occupy whole radio bandwidth. Changing interval
to 160 msec should be sufficient for both speeding up connection
establishment and leaving space for other activities, like inquiry scan,
e.g.
"

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

parent c20f8e35

net/bluetooth/mgmt.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -2596,8 +2596,8 @@ static int set_fast_connectable(struct sock sk, struct hci_dev hdev,
		if (cp->val) {
		type = PAGE_SCAN_TYPE_INTERLACED;

		/* 22.5 msec page scan interval */
		acp.interval = __constant_cpu_to_le16(0x0024);
		/* 160 msec page scan interval */
		acp.interval = __constant_cpu_to_le16(0x0100);
		} else {
		type = PAGE_SCAN_TYPE_STANDARD; /* default */

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