From 0b60eba1b29740a606e6b7694d2dc98b6085a1bf Mon Sep 17 00:00:00 2001
From: Johan Hedberg <johan.hedberg@intel.com>
Date: Tue, 28 Feb 2012 00:57:24 +0200
Subject: Bluetooth: Don't send unnecessary write_le_enable command

If the local host features indicate that LE is already in the state that
is desired there's no point in sending the HCI command to try to change
the setting.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 27830f4..c4d3bc9 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1260,7 +1260,7 @@ static int set_le(struct sock *sk, u16 index, void *data, u16 len)
 	struct pending_cmd *cmd;
 	struct hci_dev *hdev;
 	int err;
-	u8 val;
+	u8 val, enabled;
 
 	BT_DBG("request for hci%u", index);
 
@@ -1280,8 +1280,9 @@ static int set_le(struct sock *sk, u16 index, void *data, u16 len)
 	}
 
 	val = !!cp->val;
+	enabled = !!(hdev->host_features[0] & LMP_HOST_LE);
 
-	if (!hdev_is_powered(hdev)) {
+	if (!hdev_is_powered(hdev) || val == enabled) {
 		bool changed = false;
 
 		if (val != test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
-- 
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