Bluetooth: mgmt: Make Set SSP command callable while powered off

This patch makes it possible to enable SSP through mgmt even when
powered off. The setting will then get automatically actiated when
powering on.

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

2 files changed, 45 insertions, 19 deletions

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 1b1c348..240dc16 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -427,21 +427,18 @@ static void hci_cc_write_ssp_mode(struct hci_dev *hdev, struct sk_buff *skb)
 
 	BT_DBG("%s status 0x%x", hdev->name, status);
 
-	if (status)
-		goto done;
-
 	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
 	if (!sent)
 		return;
 
-	if (*((u8 *) sent))
-		set_bit(HCI_SSP_ENABLED, &hdev->dev_flags);
-	else
-		clear_bit(HCI_SSP_ENABLED, &hdev->dev_flags);
-
-done:
 	if (test_bit(HCI_MGMT, &hdev->dev_flags))
-		mgmt_ssp_enable_complete(hdev, status);
+		mgmt_ssp_enable_complete(hdev, *((u8 *) sent), status);
+	else if (!status) {
+		if (*((u8 *) sent))
+			set_bit(HCI_SSP_ENABLED, &hdev->dev_flags);
+		else
+			clear_bit(HCI_SSP_ENABLED, &hdev->dev_flags);
+	}
 }
 
 static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
@@ -560,7 +557,8 @@ static void hci_setup(struct hci_dev *hdev)
 	if (hdev->hci_ver > BLUETOOTH_VER_1_1)
 		hci_send_cmd(hdev, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
 
-	if (hdev->features[6] & LMP_SIMPLE_PAIR) {
+	if (hdev->features[6] & LMP_SIMPLE_PAIR &&
+				test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
 		u8 mode = 0x01;
 		hci_send_cmd(hdev, HCI_OP_WRITE_SSP_MODE, sizeof(mode), &mode);
 	}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 69d4e1a..eefd084 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1138,9 +1138,23 @@ static int set_ssp(struct sock *sk, u16 index, void *data, u16 len)
 
 	hci_dev_lock(hdev);
 
+	val = !!cp->val;
+
 	if (!hdev_is_powered(hdev)) {
-		err = cmd_status(sk, index, MGMT_OP_SET_SSP,
-						MGMT_STATUS_NOT_POWERED);
+		bool changed = false;
+
+		if (val != test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
+			change_bit(HCI_SSP_ENABLED, &hdev->dev_flags);
+			changed = true;
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_SSP, hdev);
+		if (err < 0)
+			goto failed;
+
+		if (changed)
+			err = new_settings(hdev, sk);
+
 		goto failed;
 	}
 
@@ -1155,8 +1169,6 @@ static int set_ssp(struct sock *sk, u16 index, void *data, u16 len)
 		goto failed;
 	}
 
-	val = !!cp->val;
-
 	if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) == val) {
 		err = send_settings_rsp(sk, MGMT_OP_SET_SSP, hdev);
 		goto failed;
@@ -3393,21 +3405,37 @@ static int clear_eir(struct hci_dev *hdev)
 	return hci_send_cmd(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
 }
 
-int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 status)
+int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status)
 {
 	struct cmd_lookup match = { NULL, hdev };
-	int err;
+	bool changed = false;
+	int err = 0;
 
 	if (status) {
 		u8 mgmt_err = mgmt_status(status);
+
+		if (enable && test_and_clear_bit(HCI_SSP_ENABLED,
+							&hdev->dev_flags))
+			err = new_settings(hdev, NULL);
+
 		mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev,
 						cmd_status_rsp, &mgmt_err);
-		return 0;
+
+		return err;
+	}
+
+	if (enable) {
+		if (!test_and_set_bit(HCI_SSP_ENABLED, &hdev->dev_flags))
+			changed = true;
+	} else {
+		if (test_and_clear_bit(HCI_SSP_ENABLED, &hdev->dev_flags))
+			changed = true;
 	}
 
 	mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, settings_rsp, &match);
 
-	err = new_settings(hdev, match.sk);
+	if (changed)
+		err = new_settings(hdev, match.sk);
 
 	if (match.sk) {
 		sock_put(match.sk);