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Bluetooth: Fix sending write_le_host_supporte for LE-only controllers 

The Bluetooth Core Specification (4.0) defines the Write LE Host
Supported HCI command as only available for controllers supporting
BR/EDR. This is further reflected in the Read Local Extended Features
HCI command also not being available for LE-only controllers. In other
words, host-side LE support is implicit for single-mode LE controllers
and doesn't have explicit HCI-level enablement.

This patch ensures that the LE setting is always exposed as enabled
through mgmt and returns a "rejected" response if user space tries to
toggle the setting. The patch also ensures that Write LE Host Supported
is never sent for LE-only controllers.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Johan Hedberg 2013-04-19 18:35:21 +03:00 committed by Gustavo Padovan
parent 07dc93dd14
commit c73eee9172
2 changed files with 17 additions and 1 deletions
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10
net/bluetooth/hci_core.c
View File

@ -377,6 +377,8 @@ static void bredr_setup(struct hci_request *req)
static void le_setup(struct hci_request *req)
{
struct hci_dev *hdev = req->hdev;
/* Read LE Buffer Size */
hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
@ -391,6 +393,10 @@ static void le_setup(struct hci_request *req)
/* Read LE Supported States */
hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
/* LE-only controllers have LE implicitly enabled */
if (!lmp_bredr_capable(hdev))
set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
}
static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
@ -574,6 +580,10 @@ static void hci_set_le_support(struct hci_request *req)
struct hci_dev *hdev = req->hdev;
struct hci_cp_write_le_host_supported cp;
/* LE-only devices do not support explicit enablement */
if (!lmp_bredr_capable(hdev))
return;
memset(&cp, 0, sizeof(cp));
if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {

8
net/bluetooth/mgmt.c
View File

@ -1351,6 +1351,11 @@ static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
return cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
MGMT_STATUS_INVALID_PARAMS);
/* LE-only devices do not allow toggling LE on/off */
if (!lmp_bredr_capable(hdev))
return cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
MGMT_STATUS_REJECTED);
hci_dev_lock(hdev);
val = !!cp->val;
@ -3347,7 +3352,8 @@ static int powered_update_hci(struct hci_dev *hdev)
hci_req_add(&req, HCI_OP_WRITE_SSP_MODE, 1, &ssp);
}
if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags) &&
lmp_bredr_capable(hdev)) {
struct hci_cp_write_le_host_supported cp;
cp.le = 1;