Commit Graph

35 Commits

Author SHA1 Message Date
Johan Hedberg
c81d555a26 Bluetooth: Fix crash in SMP when unpairing
When unpairing the keys stored in hci_dev are removed. If SMP is
ongoing the SMP context will also have references to these keys, so
removing them from the hci_dev lists will make the pointers invalid.
This can result in the following type of crashes:

 BUG: unable to handle kernel paging request at 6b6b6b6b
 IP: [<c11f26be>] __list_del_entry+0x44/0x71
 *pde = 00000000
 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
 Modules linked in: hci_uart btqca btusb btintel btbcm btrtl hci_vhci rfcomm bluetooth_6lowpan bluetooth
 CPU: 0 PID: 723 Comm: kworker/u5:0 Not tainted 4.3.0-rc3+ #1379
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.1-20150318_183358- 04/01/2014
 Workqueue: hci0 hci_rx_work [bluetooth]
 task: f19da940 ti: f1a94000 task.ti: f1a94000
 EIP: 0060:[<c11f26be>] EFLAGS: 00010202 CPU: 0
 EIP is at __list_del_entry+0x44/0x71
 EAX: c0088d20 EBX: f30fcac0 ECX: 6b6b6b6b EDX: 6b6b6b6b
 ESI: f4b60000 EDI: c0088d20 EBP: f1a95d90 ESP: f1a95d8c
  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
 CR0: 8005003b CR2: 6b6b6b6b CR3: 319e5000 CR4: 00000690
 Stack:
  f30fcac0 f1a95db0 f82dc3e1 f1bfc000 00000000 c106524f f1bfc000 f30fd020
  f1a95dc0 f1a95dd0 f82dcbdb f1a95de0 f82dcbdb 00000067 f1bfc000 f30fd020
  f1a95de0 f1a95df0 f82d1126 00000067 f82d1126 00000006 f30fd020 f1bfc000
 Call Trace:
  [<f82dc3e1>] smp_chan_destroy+0x192/0x240 [bluetooth]
  [<c106524f>] ? trace_hardirqs_on_caller+0x14e/0x169
  [<f82dcbdb>] smp_teardown_cb+0x47/0x64 [bluetooth]
  [<f82dcbdb>] ? smp_teardown_cb+0x47/0x64 [bluetooth]
  [<f82d1126>] l2cap_chan_del+0x5d/0x14d [bluetooth]
  [<f82d1126>] ? l2cap_chan_del+0x5d/0x14d [bluetooth]
  [<f82d40ef>] l2cap_conn_del+0x109/0x17b [bluetooth]
  [<f82d40ef>] ? l2cap_conn_del+0x109/0x17b [bluetooth]
  [<f82c0205>] ? hci_event_packet+0x5b1/0x2092 [bluetooth]
  [<f82d41aa>] l2cap_disconn_cfm+0x49/0x50 [bluetooth]
  [<f82d41aa>] ? l2cap_disconn_cfm+0x49/0x50 [bluetooth]
  [<f82c0228>] hci_event_packet+0x5d4/0x2092 [bluetooth]
  [<c1332c16>] ? skb_release_data+0x6a/0x95
  [<f82ce5d4>] ? hci_send_to_monitor+0xe7/0xf4 [bluetooth]
  [<c1409708>] ? _raw_spin_unlock_irqrestore+0x44/0x57
  [<f82b3bb0>] hci_rx_work+0xf1/0x28b [bluetooth]
  [<f82b3bb0>] ? hci_rx_work+0xf1/0x28b [bluetooth]
  [<c10635a0>] ? __lock_is_held+0x2e/0x44
  [<c104772e>] process_one_work+0x232/0x432
  [<c1071ddc>] ? rcu_read_lock_sched_held+0x50/0x5a
  [<c104772e>] ? process_one_work+0x232/0x432
  [<c1047d48>] worker_thread+0x1b8/0x255
  [<c1047b90>] ? rescuer_thread+0x23c/0x23c
  [<c104bb71>] kthread+0x91/0x96
  [<c14096a7>] ? _raw_spin_unlock_irq+0x27/0x44
  [<c1409d61>] ret_from_kernel_thread+0x21/0x30
  [<c104bae0>] ? kthread_parkme+0x1e/0x1e

To solve the issue, introduce a new smp_cancel_pairing() API that can
be used to clean up the SMP state before touching the hci_dev lists.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-22 09:02:03 +02:00
Marcel Holtmann
60a27d653d Bluetooth: Add function for generating LE SC out-of-band data
This patch adds a smp_generate_oob function that allows to create
local out-of-band data that can be used for pairing and also provides
the confirmation and random value.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 10:31:27 +02:00
Johan Hedberg
0a2b0f0452 Bluetooth: Add skeleton for SMP self-tests
This patch adds the initial skeleton and kernel config option for SMP
self-tests.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 08:54:33 +01:00
Johan Hedberg
cd08279762 Bluetooth: Fix missing const declarations in SMP functions
Several SMP functions take read-only data. This patch fixes the
declaration of these parameters to use the const specifier as
appropriate.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 16:51:21 +01:00
Johan Hedberg
8f5eeca321 Bluetooth: Set the correct security level for SC LTKs
When the looked-up LTK is one generated by Secure Connections pairing
the security level it gives is BT_SECURITY_FIPS. This patch updates the
LTK request event handler to correctly set this level.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 16:51:15 +01:00
Johan Hedberg
23fb8de376 Bluetooth: Add mgmt support for LE Secure Connections LTK types
We need a dedicated LTK type for LTK resulting from a Secure Connections
based SMP pairing. This patch adds a new define for it and ensures that
both the New LTK event as well as the Load LTKs command supports it.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 16:51:15 +01:00
Johan Hedberg
e65392e2cc Bluetooth: Add basic SMP defines for LE Secure Connections
This patch adds basic SMP defines for commands, error codes and PDU
definitions for the LE Secure Connections feature.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 16:51:14 +01:00
Johan Hedberg
35dc6f834c Bluetooth: Add key preference parameter to smp_sufficient_security
So far smp_sufficient_security() has returned false if we're encrypted
with an STK but do have an LTK available. However, for the sake of LE
CoC servers we do want to let the incoming connection through even
though we're only encrypted with the STK.

This patch adds a key preference parameter to smp_sufficient_security()
with two possible values (enum used instead of bool for readability).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-15 01:46:49 +01:00
Johan Hedberg
a6f7833ca3 Bluetooth: Add smp_ltk_sec_level() helper function
There are several places that need to determine the security level that
an LTK can provide. This patch adds a convenience function for this to
help make the code more readable.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-11 02:45:24 +02:00
Johan Hedberg
b28b494366 Bluetooth: Add strict checks for allowed SMP PDUs
SMP defines quite clearly when certain PDUs are to be expected/allowed
and when not, but doesn't have any explicit request/response definition.
So far the code has relied on each PDU handler to behave correctly if
receiving PDUs at an unexpected moment, however this requires many
different checks and is prone to errors.

This patch introduces a generic way to keep track of allowed PDUs and
thereby reduces the responsibility & load on individual command
handlers. The tracking is implemented using a simple bit-mask where each
opcode maps to its own bit. If the bit is set the corresponding PDU is
allow and if the bit is not set the PDU is not allowed.

As a simple example, when we send the Pairing Request we'd set the bit
for Pairing Response, and when we receive the Pairing Response we'd
clear the bit for Pairing Response.

Since the disallowed PDU rejection is now done in a single central place
we need to be a bit careful of which action makes most sense to all
cases. Previously some, such as Security Request, have been simply
ignored whereas others have caused an explicit disconnect.

The only PDU rejection action that keeps good interoperability and can
be used for all the applicable use cases is to drop the data. This may
raise some concerns of us now being more lenient for misbehaving (and
potentially malicious) devices, but the policy of simply dropping data
has been a successful one for many years e.g. in L2CAP (where this is
the *only* policy for such cases - we never request disconnection in
l2cap_core.c because of bad data). Furthermore, we cannot prevent
connected devices from creating the SMP context (through a Security or
Pairing Request), and once the context exists looking up the
corresponding bit for the received opcode and deciding to reject it is
essentially an equally lightweight operation as the kind of rejection
that l2cap_core.c already successfully does.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-08 19:07:56 +02:00
Johan Hedberg
6f48e260a9 Bluetooth: Make smp_chan_destroy() private to smp.c
There are no external users of smp_chan_destroy() so make it private to
smp.c. The patch also moves the function higher up in the c-file in
order to avoid forward declarations.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 08:49:24 +02:00
Johan Hedberg
44f1a7ab51 Bluetooth: Use L2CAP resume callback to call smp_distribute_keys
There's no need to export the smp_distribute_keys() function since the
resume callback is called in the same scenario. This patch makes the
smp_notify_keys function private (at the same time moving it higher up
in smp.c to avoid forward declarations) and adds a resume callback for
SMP to call it from there instead.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 08:49:21 +02:00
Johan Hedberg
5d88cc73dd Bluetooth: Convert SMP to use l2cap_chan infrastructure
Now that we have all the necessary pieces in place we can fully convert
SMP to use the L2CAP channel infrastructure. This patch adds the
necessary callbacks and removes the now unneeded conn->smp_chan pointer.

One notable behavioral change in this patch comes from the following
code snippet:

-       case L2CAP_CID_SMP:
-               if (smp_sig_channel(conn, skb))
-                       l2cap_conn_del(conn->hcon, EACCES);

This piece of code was essentially forcing a disconnection if garbage
SMP data was received. The l2cap_conn_del() function is private to
l2cap_conn.c so we don't have access to it anymore when using the L2CAP
channel callbacks. Therefore, the behavior of the new code is simply to
return errors in the recv() callback (which is simply the old
smp_sig_channel()), but no disconnection will occur.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 08:49:19 +02:00
Johan Hedberg
defce9e836 Bluetooth: Make AES crypto context private to SMP
Now that we have per-adapter SMP data thanks to the root SMP L2CAP
channel we can take advantage of it and attach the AES crypto context
(only used for SMP) to it. This means that the smp_irk_matches() and
smp_generate_rpa() function can be converted to internally handle the
AES context.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 08:49:19 +02:00
Johan Hedberg
711eafe345 Bluetooth: Move SMP (de)initialization to smp.c
As preparation for moving SMP to use l2cap_chan infrastructure we need
to move the (de)initialization functions to smp.c (where they'll
eventually need access to the local L2CAP channel callbacks).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 08:49:18 +02:00
Johan Hedberg
2ceba53936 Bluetooth: Remove HCI prefix from SMP LTK defines
The LTK type has really nothing to do with HCI so it makes more sense to
have these in smp.h than hci.h. This patch moves the defines to smp.h
and removes the HCI_ prefix in the same go.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-03 17:42:42 +02:00
Johan Hedberg
4bc58f51e1 Bluetooth: Make SMP context private to smp.c
There are no users of the smp_chan struct outside of smp.c so move it
away from smp.h. The addition of the l2cap.h include to hci_core.c,
hci_conn.c and mgmt.c is something that should have been there already
previously to avoid warnings of undeclared struct l2cap_conn, but the
compiler warning was apparently shadowed away by the mention of
l2cap_conn in the struct smp_chan definition.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 08:44:11 -07:00
Johan Hedberg
38e4a91566 Bluetooth: Add support for SMP Invalid Parameters error code
The Invalid Parameters error code is used to indicate that the command
length is invalid or that a parameter is outside of the specified range.
This error code wasn't clearly specified in the Bluetooth 4.0
specification but since 4.1 this has been fixed.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 07:50:02 -07:00
Johan Hedberg
1d98bf4fda Bluetooth: Remove LTK re-encryption procedure
Due to several devices being unable to handle this procedure reliably
(resulting in forced disconnections before pairing completes) it's
better to remove it altogether.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:56 -07:00
Johan Hedberg
edca792c03 Bluetooth: Add SMP flag to track which side is the initiator
For remotely initiated just-works pairings we want to show the user a
confirmation dialog for the pairing. However, we can only know which
side was the initiator by tracking which side sends the first Security
Request or Pairing Request PDU. This patch adds a new SMP flag to
indicate whether our side was the initiator for the pairing.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:56 -07:00
Johan Hedberg
5ed884d765 Bluetooth: Increase SMP re-encryption delay to 500ms
In some cases the current 250ms delay is not enough for the remote to
receive the keys, as can be witnessed by the following log:

> ACL Data RX: Handle 64 flags 0x02 dlen 21               [hci1] 231.414217
      SMP: Signing Information (0x0a) len 16
        Signature key: 555bb66b7ab3abc9d5c287c97fe6eb29
< ACL Data TX: Handle 64 flags 0x00 dlen 21               [hci1] 231.414414
      SMP: Encryption Information (0x06) len 16
        Long term key: 2a7cdc233c9a4b1f3ed31dd9843fea29
< ACL Data TX: Handle 64 flags 0x00 dlen 15               [hci1] 231.414466
      SMP: Master Identification (0x07) len 10
        EDIV: 0xeccc
        Rand: 0x322e0ef50bd9308a
< ACL Data TX: Handle 64 flags 0x00 dlen 21               [hci1] 231.414505
      SMP: Signing Information (0x0a) len 16
        Signature key: bbda1b2076e2325aa66fbcdd5388f745
> HCI Event: Number of Completed Packets (0x13) plen 5    [hci1] 231.483130
        Num handles: 1
        Handle: 64
        Count: 2
< HCI Command: LE Start Encryption (0x08|0x0019) plen 28  [hci1] 231.664211
        Handle: 64
        Random number: 0x5052ad2b75fed54b
        Encrypted diversifier: 0xb7c2
        Long term key: a336ede66711b49a84bde9b41426692e
> HCI Event: Command Status (0x0f) plen 4                 [hci1] 231.666937
      LE Start Encryption (0x08|0x0019) ncmd 1
        Status: Success (0x00)
> HCI Event: Number of Completed Packets (0x13) plen 5    [hci1] 231.712646
        Num handles: 1
        Handle: 64
        Count: 1
> HCI Event: Disconnect Complete (0x05) plen 4            [hci1] 232.562587
        Status: Success (0x00)
        Handle: 64
        Reason: Remote User Terminated Connection (0x13)

As can be seen, the last key (Signing Information) is sent at 231.414505
but the completed packets event for it comes only at 231.712646,
i.e. roughly 298ms later.

To have a better margin of error this patch increases the delay to
500ms.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 13:55:06 -07:00
Marcel Holtmann
7ee4ea3692 Bluetooth: Add support for handling signature resolving keys
The connection signature resolving key (CSRK) is used for attribute
protocol signed write procedures. This change generates a new local
key during pairing and requests the peer key as well.

Newly generated key and received key will be provided to userspace
using the New Signature Resolving Key management event.

The Master CSRK can be used for verification of remote signed write
PDUs and the Slave CSRK can be used for sending signed write PDUs
to the remote device.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 21:39:50 +02:00
Johan Hedberg
e3098be40b Bluetooth: Delay LTK encryption to let remote receive all keys
Some devices may refuse to re-encrypt with the LTK if they haven't
received all our keys yet. This patch adds a 250ms delay before
attempting re-encryption with the LTK.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 08:17:46 -08:00
Johan Hedberg
38ccdc9332 Bluetooth: Re-encrypt link after receiving an LTK
It's not strictly speaking required to re-encrypt a link once we receive
an LTK since the connection is already encrypted with the STK. However,
re-encrypting with the LTK allows us to verify that we've received an
LTK that actually works.

This patch updates the SMP code to request encrypting with the LTK in
case we're in master role and waits until the key refresh complete event
before notifying user space of the distributed keys.

A new flag is also added for the SMP context to ensure that we
re-encryption only once in case of multiple calls to smp_distribute_keys.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 08:17:46 -08:00
Marcel Holtmann
fe39c7b2da Bluetooth: Use __le64 type for LE random numbers
The random numbers in Bluetooth Low Energy are 64-bit numbers and should
also be little endian since the HCI specification is little endian.

Change the whole Low Energy pairing to use __le64 instead of a byte
array.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-02-28 12:36:04 +02:00
Johan Hedberg
4bd6d38e7f Bluetooth: Remove unneeded "force" parameter from smp_distribute_keys()
Now that to-be-received keys are properly tracked we no-longer need the
"force" parameter to smp_distribute_keys(). It was essentially acting as
an indicator whether all keys have been received, but now it's just
redundant together with smp->remote_key_dist.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-26 13:46:04 -08:00
Johan Hedberg
b1e2b3ae97 Bluetooth: Add SMP function for generating RPAs
We need a function in smp.c to generate Resolvable Random Addresses in
order to support privacy. The local RPA will need to be generated before
advertising, scanning or connecting and regenerated at periodic
intervals. This patch adds the necessary function for RPA generation.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-23 12:24:25 -08:00
Johan Hedberg
23d0e128e3 Bluetooth: Track SMP keys in the SMP context
As preparation to do mgmt notification in a single place at the end of
the key distribution, store the keys that need to be notified within the
SMP context.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-19 08:04:24 -08:00
Johan Hedberg
f4a407bef2 Bluetooth: Wait for SMP key distribution completion when pairing
When we initiate pairing through mgmt_pair_device the code has so far
been waiting for a successful HCI Encrypt Change event in order to
respond to the mgmt command. However, putting privacy into the play we
actually want the key distribution to be complete before replying so
that we can include the Identity Address in the mgmt response.

This patch updates the various hci_conn callbacks for LE in mgmt.c to
only respond in the case of failure, and adds a new mgmt_smp_complete
function that the SMP code will call once key distribution has been
completed.

Since the smp_chan_destroy function that's used to indicate completion
and clean up the SMP context can be called from various places,
including outside of smp.c, the easiest way to track failure vs success
is a new flag that we set once key distribution has been successfully
completed.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 11:48:55 -08:00
Johan Hedberg
893ce8b1b3 Bluetooth: Remove SMP data specific crypto context
Now that each HCI device has its own AES crypto context we don't need
the one stored in the SMP data any more. This patch removes the variable
from struct smp_chan and updates the SMP code to use the per-hdev crypto
context.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 11:48:54 -08:00
Johan Hedberg
fd349c020c Bluetooth: Enable support for remote IRK distribution
This patch does the necessary changes to request the remote device to
distribute its IRK to us during the SMP pairing procedure. This includes
setting the right key distribution values in the pairing
request/response and handling of the two related SMP PDUs, i.e. Identity
Information and Identity Address Information.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 00:47:03 -08:00
Johan Hedberg
60478054a6 Bluetooth: Add smp_irk_matches helper function
This patch adds a helper function to check whether a given IRK matches a
given Resolvable Private Address (RPA). The function will be needed for
implementing the rest of address resolving support.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 00:47:02 -08:00
Johan Hedberg
6bfdfe3cd6 Bluetooth: Fix minor whitespace issues in SMP code
This patch fixes a couple of unnecessary empty lines in the SMP code.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 00:47:02 -08:00
Johan Hedberg
ad32a2f5ce Bluetooth: Add smp_sufficient_security helper function
This function is needed both by the smp_conn_security function as well
as upcoming code to check for the security requirements when receiving
an L2CAP connect request over LE.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Marcel Holtmann
ac4b723661 Bluetooth: Move smp.h header file into net/bluetooth/
The smp.h header file is only used internally by the bluetooth.ko
module and is not a public API. So make it local to the core
Bluetooth module.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-11 00:10:07 +02:00