To enable Enhanced Retransmission mode it needs to be set via a socket
option. A different mode can be set on a socket, but on listen() and
connect() the mode is checked and ERTM is only allowed if it is enabled
via the module parameter.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Since the Enhanced Retransmission mode for L2CAP is still under heavy
development disable it by default and provide a module option to enable
it manually for testing.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The rfcomm_init bug fix went into the kernel premature before it got fully
reviewed and acknowledged by the Bluetooth maintainer. So fix up the coding
style now.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

hdev->req_lock is used as mutex so make it a mutex.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The core exports the hci_conn_hold_device() and hci_conn_put_device()
functions for device reference of connections. Use this to ensure that
the uevents from the parent are send after the child ones.

Based on a report by Brian Rogers <brian@xyzw.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The device model itself has no real usable reference counting at the
moment and this causes problems if parents are deleted before their
children. The device model itself handles the memory details of this
correctly, but the uevent order is not consistent. This causes various
problems for systems like HAL or even X.

So until device_put() does a proper cleanup, the device for Bluetooth
connection will be protected with an extra reference counting to ensure
the correct order of uevents when connections are terminated.

This is not an automatic feature. Higher Bluetooth layers like HIDP or
BNEP should grab this new reference to ensure that their uevents are
send before the ones from the parent device.

Based on a report by Brian Rogers <brian@xyzw.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Currently the HID subsystem will create HIDRAW devices for the transport
driver, but it will not disconnect them. Until the HID subsytem gets
fixed, ensure that HIDRAW and HIDDEV devices are disconnected when the
Bluetooth HID device gets removed.

Based on a patch from Brian Rogers <brian@xyzw.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

There is a test case in PTS tool; PTS will send the VIRTUAL_CABLE_UNPLUG
command to IUT. Then IUT should disconnect the channel and kill the HID
session when it receives the command. The VIRTUAL_CABLE_UNPLUG command
is parsed by HID transport, but it is not scheduled to do so. Add a
call to hidp_schedule() to kill the session.
Signed-off-by: NJothikumar Mothilal <jothikumar.mothilal@atheros.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The SCO sockets for Bluetooth audio setup and streaming are missing the
shutdown implementation. This hasn't been a problem so far, but with a
more deeper integration with PulseAudio it is important to shutdown SCO
sockets properly.

Also the Headset profile 1.2 has more detailed qualification tests that
require that SCO and RFCOMM channels are terminated in the right order. A
proper shutdown function is necessary for this.

Based on a report by Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Tested-by: NJohan Hedberg <johan.hedberg@nokia.com>

String literals are constant, and usually, we can also tag the array
of pointers const too, moving it to the .rodata section.
Signed-off-by: NJan Engelhardt <jengelh@medozas.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

rfcomm tty may be used before rfcomm_tty_driver initilized,
The problem is that now socket layer init before tty layer, if userspace
program do socket callback right here then oops will happen.

reporting in:
http://marc.info/?l=linux-bluetooth&m=124404919324542&w=2

make 3 changes:
1. remove #ifdef in rfcomm/core.c,
make it blank function when rfcomm tty not selected in rfcomm.h

2. tune the rfcomm_init error patch to ensure
tty driver initilized before rfcomm socket usage.

3. remove __exit for rfcomm_cleanup_sockets
because above change need call it in a __init function.
Reported-by: NOliver Hartkopp <oliver@hartkopp.net>
Tested-by: NOliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: NDave Young <hidave.darkstar@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch is the result of an automatic spatch transformation to convert
all ndo_start_xmit() return values of 0 to NETDEV_TX_OK.

Some occurences are missed by the automatic conversion, those will be
handled in a seperate patch.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

commit 2b85a34e
(net: No more expensive sock_hold()/sock_put() on each tx)
changed initial sk_wmem_alloc value.

We need to take into account this offset when reporting
sk_wmem_alloc to user, in PROC_FS files or various
ioctls (SIOCOUTQ/TIOCOUTQ)
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since the re-write of the RFKILL subsystem it is no longer good to just
select RFKILL, but it is important to add a proper depends on rule.

Based on a report by Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

With the re-write of the RFKILL subsystem it is now possible to easily
integrate RFKILL soft-switch support into the Bluetooth subsystem. All
Bluetooth devices will now get automatically RFKILL support.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The Bluetooth source uses some endian conversion helpers, that in the end
translate to kernel standard routines. So remove this obfuscation since it
is fully pointless.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This adds the basic constants required to add support for L2CAP Enhanced
Retransmission feature.

Based on a patch from Nathan Holstein <nathan@lampreynetworks.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch fixes the errors without changing the l2cap.o binary:

 text    data     bss     dec     hex filename
18059     568       0   18627    48c3 l2cap.o.after
18059     568       0   18627    48c3 l2cap.o.before
Signed-off-by: NGustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The initial value of err is not used until it is set to -ENOMEM. So just
remove the initialization completely.

Based on a patch from Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Using the L2CAP_CONF_HINT macro is easier to understand than using a
hardcoded 0x80 value.
Signed-off-by: NGustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Use macros instead of hardcoded numbers to make the L2CAP source code
more readable.
Signed-off-by: NGustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Change the name of the Kernel CAPI exported function capi_ctr_reseted()
to something representing its purpose better.

Impact: renaming, no functional change
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The calls to flush_work() are pointless in a single thread workqueue
and they are actually causing a lockdep warning.

=============================================
[ INFO: possible recursive locking detected ]
2.6.30-rc6-02911-gbb803cfb #16
---------------------------------------------
bluetooth/2518 is trying to acquire lock:
 (bluetooth){+.+.+.}, at: [<c0130c14>] flush_work+0x28/0xb0

but task is already holding lock:
 (bluetooth){+.+.+.}, at: [<c0130424>] worker_thread+0x149/0x25e

other info that might help us debug this:
2 locks held by bluetooth/2518:
 #0:  (bluetooth){+.+.+.}, at: [<c0130424>] worker_thread+0x149/0x25e
 #1:  (&conn->work_del){+.+...}, at: [<c0130424>] worker_thread+0x149/0x25e

stack backtrace:
Pid: 2518, comm: bluetooth Not tainted 2.6.30-rc6-02911-gbb803cfb #16
Call Trace:
 [<c03d64d9>] ? printk+0xf/0x11
 [<c0140d96>] __lock_acquire+0x7ce/0xb1b
 [<c0141173>] lock_acquire+0x90/0xad
 [<c0130c14>] ? flush_work+0x28/0xb0
 [<c0130c2e>] flush_work+0x42/0xb0
 [<c0130c14>] ? flush_work+0x28/0xb0
 [<f8b84966>] del_conn+0x1c/0x84 [bluetooth]
 [<c0130469>] worker_thread+0x18e/0x25e
 [<c0130424>] ? worker_thread+0x149/0x25e
 [<f8b8494a>] ? del_conn+0x0/0x84 [bluetooth]
 [<c0133843>] ? autoremove_wake_function+0x0/0x33
 [<c01302db>] ? worker_thread+0x0/0x25e
 [<c013355a>] kthread+0x45/0x6b
 [<c0133515>] ? kthread+0x0/0x6b
 [<c01034a7>] kernel_thread_helper+0x7/0x10

Based on a report by Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: NDave Young <hidave.darkstar@gmail.com>
Tested-by: NOliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

A remote device in security mode 3 that tries to connect will require
the pairing during the connection setup phase. The disconnect timeout
is now triggered within 10 milliseconds and causes the pairing to fail.

If a connection is not fully established and a PIN code request is
received, don't trigger the disconnect timeout. The either successful
or failing connection complete event will make sure that the timeout
is triggered at the right time.

The biggest problem with security mode 3 is that many Bluetooth 2.0
device and before use a temporary security mode 3 for dedicated
bonding.

Based on a report by Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Tested-by: NJohan Hedberg <johan.hedberg@nokia.com>

The connection setup phase takes around 2 seconds or longer and in
that time it is possible that the need for an ACL connection is no
longer present. If that happens then, the connection attempt will
be canceled.

This only applies to outgoing connections, but currently it can also
be triggered by incoming connection. Don't call hci_acl_connect_cancel()
on incoming connection since these have to be either accepted or rejected
in this state. Once they are successfully connected they need to be
fully disconnected anyway.

Also remove the wrong hci_acl_disconn() call for SCO and eSCO links
since at this stage they can't be disconnected either, because the
connection handle is still unknown.

Based on a report by Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Tested-by: NJohan Hedberg <johan.hedberg@nokia.com>

The module refcount is increased by hci_dev_hold() call in hci_conn_add()
and decreased by hci_dev_put() call in del_conn(). In case the connection
setup fails, hci_dev_put() is never called.

Procedure to reproduce the issue:

  # hciconfig hci0 up
  # lsmod | grep btusb                   -> "used by" refcount = 1

  # hcitool cc <non-exisiting bdaddr>    -> will get timeout

  # lsmod | grep btusb                   -> "used by" refcount = 2
  # hciconfig hci0 down
  # lsmod | grep btusb                   -> "used by" refcount = 1
  # rmmod btusb                          -> ERROR: Module btusb is in use

The hci_dev_put() call got moved into del_conn() with the 2.6.25 kernel
to fix an issue with hci_dev going away before hci_conn. However that
change was wrong and introduced this problem.

When calling hci_conn_del() it has to call hci_dev_put() after freeing
the connection details. This handling should be fully symmetric. The
execution of del_conn() is done in a work queue and needs it own calls
to hci_dev_hold() and hci_dev_put() to ensure that the hci_dev stays
until the connection cleanup has been finished.

Based on a report by Bing Zhao <bzhao@marvell.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Tested-by: NBing Zhao <bzhao@marvell.com>

Setting the name of a sysfs device has to be done in a context that can
actually sleep. It allocates its memory with GFP_KERNEL. Previously it
was a static (size limited) string and that got changed to accommodate
longer device names. So move the dev_set_name() just before calling
device_add() which is executed in a work queue.

This fixes the following error:

[  110.012125] BUG: sleeping function called from invalid context at mm/slub.c:1595
[  110.012135] in_atomic(): 1, irqs_disabled(): 0, pid: 0, name: swapper
[  110.012141] 2 locks held by swapper/0:
[  110.012145]  #0:  (hci_task_lock){++.-.+}, at: [<ffffffffa01f822f>] hci_rx_task+0x2f/0x2d0 [bluetooth]
[  110.012173]  #1:  (&hdev->lock){+.-.+.}, at: [<ffffffffa01fb9e2>] hci_event_packet+0x72/0x25c0 [bluetooth]
[  110.012198] Pid: 0, comm: swapper Tainted: G        W 2.6.30-rc4-g953cdaa #1
[  110.012203] Call Trace:
[  110.012207]  <IRQ>  [<ffffffff8023eabd>] __might_sleep+0x14d/0x170
[  110.012228]  [<ffffffff802cfbe1>] __kmalloc+0x111/0x170
[  110.012239]  [<ffffffff803c2094>] kvasprintf+0x64/0xb0
[  110.012248]  [<ffffffff803b7a5b>] kobject_set_name_vargs+0x3b/0xa0
[  110.012257]  [<ffffffff80465326>] dev_set_name+0x76/0xa0
[  110.012273]  [<ffffffffa01fb9e2>] ? hci_event_packet+0x72/0x25c0 [bluetooth]
[  110.012289]  [<ffffffffa01ffc1d>] hci_conn_add_sysfs+0x3d/0x70 [bluetooth]
[  110.012303]  [<ffffffffa01fba2c>] hci_event_packet+0xbc/0x25c0 [bluetooth]
[  110.012312]  [<ffffffff80516eb0>] ? sock_def_readable+0x80/0xa0
[  110.012328]  [<ffffffffa01fee0c>] ? hci_send_to_sock+0xfc/0x1c0 [bluetooth]
[  110.012343]  [<ffffffff80516eb0>] ? sock_def_readable+0x80/0xa0
[  110.012347]  [<ffffffff805e88c5>] ? _read_unlock+0x75/0x80
[  110.012354]  [<ffffffffa01fee0c>] ? hci_send_to_sock+0xfc/0x1c0 [bluetooth]
[  110.012360]  [<ffffffffa01f8403>] hci_rx_task+0x203/0x2d0 [bluetooth]
[  110.012365]  [<ffffffff80250ab5>] tasklet_action+0xb5/0x160
[  110.012369]  [<ffffffff8025116c>] __do_softirq+0x9c/0x150
[  110.012372]  [<ffffffff805e850f>] ? _spin_unlock+0x3f/0x80
[  110.012376]  [<ffffffff8020cbbc>] call_softirq+0x1c/0x30
[  110.012380]  [<ffffffff8020f01d>] do_softirq+0x8d/0xe0
[  110.012383]  [<ffffffff80250df5>] irq_exit+0xc5/0xe0
[  110.012386]  [<ffffffff8020e71d>] do_IRQ+0x9d/0x120
[  110.012389]  [<ffffffff8020c3d3>] ret_from_intr+0x0/0xf
[  110.012391]  <EOI>  [<ffffffff80431832>] ? acpi_idle_enter_bm+0x264/0x2a6
[  110.012399]  [<ffffffff80431828>] ? acpi_idle_enter_bm+0x25a/0x2a6
[  110.012403]  [<ffffffff804f50d5>] ? cpuidle_idle_call+0xc5/0x130
[  110.012407]  [<ffffffff8020a4b4>] ? cpu_idle+0xc4/0x130
[  110.012411]  [<ffffffff805d2268>] ? rest_init+0x88/0xb0
[  110.012416]  [<ffffffff807e2fbd>] ? start_kernel+0x3b5/0x412
[  110.012420]  [<ffffffff807e2281>] ? x86_64_start_reservations+0x91/0xb5
[  110.012424]  [<ffffffff807e2394>] ? x86_64_start_kernel+0xef/0x11b

Based on a report by Davide Pesavento <davidepesa@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Tested-by: NHugo Mildenberger <hugo.mildenberger@namir.de>
Tested-by: NBing Zhao <bzhao@marvell.com>

Due to a semantic changes in flush_workqueue() the current approach of
synchronizing the sysfs handling for connections doesn't work anymore. The
whole approach is actually fully broken and based on assumptions that are
no longer valid.

With the introduction of Simple Pairing support, the creation of low-level
ACL links got changed. This change invalidates the reason why in the past
two independent work queues have been used for adding/removing sysfs
devices. The adding of the actual sysfs device is now postponed until the
host controller successfully assigns an unique handle to that link. So
the real synchronization happens inside the controller and not the host.

The only left-over problem is that some internals of the sysfs device
handling are not initialized ahead of time. This leaves potential access
to invalid data and can cause various NULL pointer dereferences. To fix
this a new function makes sure that all sysfs details are initialized
when an connection attempt is made. The actual sysfs device is only
registered when the connection has been successfully established. To
avoid a race condition with the registration, the check if a device is
registered has been moved into the removal work.

As an extra protection two flush_work() calls are left in place to
make sure a previous add/del work has been completed first.

Based on a report by Marc Pignat <marc.pignat@hevs.ch>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Tested-by: NJustin P. Mattock <justinmattock@gmail.com>
Tested-by: NRoger Quadros <ext-roger.quadros@nokia.com>
Tested-by: NMarc Pignat <marc.pignat@hevs.ch>

The Bluetooth 2.1 specification introduced four different security modes
that can be mapped using Legacy Pairing and Simple Pairing. With the
usage of Simple Pairing it is required that all connections (except
the ones for SDP) are encrypted. So even the low security requirement
mandates an encrypted connection when using Simple Pairing. When using
Legacy Pairing (for Bluetooth 2.0 devices and older) this is not required
since it causes interoperability issues.

To support this properly the low security requirement translates into
different host controller transactions depending if Simple Pairing is
supported or not. However in case of Simple Pairing the command to
switch on encryption after a successful authentication is not triggered
for the low security mode. This patch fixes this and actually makes
the logic to differentiate between Simple Pairing and Legacy Pairing
a lot simpler.

Based on a report by Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The Bluetooth stack uses a reference counting for all established ACL
links and if no user (L2CAP connection) is present, the link will be
terminated to save power. The problem part is the dedicated pairing
when using Legacy Pairing (Bluetooth 2.0 and before). At that point
no user is present and pairing attempts will be disconnected within
10 seconds or less. In previous kernel version this was not a problem
since the disconnect timeout wasn't triggered on incoming connections
for the first time. However this caused issues with broken host stacks
that kept the connections around after dedicated pairing. When the
support for Simple Pairing got added, the link establishment procedure
needed to be changed and now causes issues when using Legacy Pairing

When using Simple Pairing it is possible to do a proper reference
counting of ACL link users. With Legacy Pairing this is not possible
since the specification is unclear in some areas and too many broken
Bluetooth devices have already been deployed. So instead of trying to
deal with all the broken devices, a special pairing timeout will be
introduced that increases the timeout to 60 seconds when pairing is
triggered.

If a broken devices now puts the stack into an unforeseen state, the
worst that happens is the disconnect timeout triggers after 120 seconds
instead of 4 seconds. This allows successful pairings with legacy and
broken devices now.

Based on a report by Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Use a different work_struct variables for add_conn() and del_conn() and
use single work queue instead of two for adding and deleting connections.

It eliminates the following error on a preemptible kernel:

[  204.358032] Unable to handle kernel NULL pointer dereference at virtual address 0000000c
[  204.370697] pgd = c0004000
[  204.373443] [0000000c] *pgd=00000000
[  204.378601] Internal error: Oops: 17 [#1] PREEMPT
[  204.383361] Modules linked in: vfat fat rfcomm sco l2cap sd_mod scsi_mod iphb pvr2d drm omaplfb ps
[  204.438537] CPU: 0    Not tainted  (2.6.28-maemo2 #1)
[  204.443664] PC is at klist_put+0x2c/0xb4
[  204.447601] LR is at klist_put+0x18/0xb4
[  204.451568] pc : [<c0270f08>]    lr : [<c0270ef4>]    psr: a0000113
[  204.451568] sp : cf1b3f10  ip : cf1b3f10  fp : cf1b3f2c
[  204.463104] r10: 00000000  r9 : 00000000  r8 : bf08029c
[  204.468353] r7 : c7869200  r6 : cfbe2690  r5 : c78692c8  r4 : 00000001
[  204.474945] r3 : 00000001  r2 : cf1b2000  r1 : 00000001  r0 : 00000000
[  204.481506] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM Segment kernel
[  204.488861] Control: 10c5387d  Table: 887fc018  DAC: 00000017
[  204.494628] Process btdelconn (pid: 515, stack limit = 0xcf1b22e0)
Signed-off-by: NRoger Quadros <ext-roger.quadros@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The Broadcom chips with 2.1 firmware handle the fallback case to a SCO
link wrongly when setting up eSCO connections.

  < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
      handle 11 voice setting 0x0060
  > HCI Event: Command Status (0x0f) plen 4
      Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1
  > HCI Event: Connect Complete (0x03) plen 11
      status 0x00 handle 1 bdaddr 00:1E:3A:xx:xx:xx type SCO encrypt 0x01

The Link Manager negotiates the fallback to SCO, but then sends out
a Connect Complete event. This is wrong and the Link Manager should
actually send a Synchronous Connection Complete event if the Setup
Synchronous Connection has been used. Only the remote side is allowed
to use Connect Complete to indicate the missing support for eSCO in
the host stack.

This patch adds a workaround for this which clearly should not be
needed, but reality is that broken Broadcom devices are deployed.

Based on a report by Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: NMarcel Holtman <marcel@holtmann.org>

Some Bluetooth chips (like the ones from Texas Instruments) don't do
proper eSCO negotiations inside the Link Manager. They just return an
error code and in case of the Kyocera ED-8800 headset it is just a
random error.

  < HCI Command: Setup Synchronous Connection 0x01|0x0028) plen 17
    handle 1 voice setting 0x0060
  > HCI Event: Command Status (0x0f) plen 4
    Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1
  > HCI Event: Synchronous Connect Complete (0x2c) plen 17
    status 0x1f handle 257 bdaddr 00:14:0A:xx:xx:xx type eSCO
    Error: Unspecified Error

In these cases it is up to the host stack to fallback to a SCO setup
and so retry with SCO parameters.

Based on a report by Nick Pelly <npelly@google.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

There is a missing call to rfcomm_dlc_clear_timer in the case that
DEFER_SETUP is used and so the connection gets disconnected after the
timeout even if it was successfully accepted previously.

This patch adds a call to rfcomm_dlc_clear_timer to rfcomm_dlc_accept
which will get called when the user accepts the connection by calling
read() on the socket.
Signed-off-by: NJohan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

struct tty_operations::proc_fops took it's place and there is one less
create_proc_read_entry() user now!
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

dpm_list currently relies on the fact that child devices will
be registered after their parents to get a correct suspend
order. Using device_move() however destroys this assumption, as
an already registered device may be moved under a newly registered
one.

This patch adds a new argument to device_move(), allowing callers
to specify how dpm_list should be adapted.
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Remove some pointless conditionals before kfree_skb().
Signed-off-by: NWei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The following commit introduce a regression:

	commit 7d0db0a3
	Author: Marcel Holtmann <marcel@holtmann.org>
	Date:   Mon Jul 14 20:13:51 2008 +0200

		[Bluetooth] Use a more unique bus name for connections

I get panic as following (by netconsole):

[ 2709.344034] usb 5-1: new full speed USB device using uhci_hcd and address 4
[ 2709.505776] usb 5-1: configuration #1 chosen from 1 choice
[ 2709.569207] Bluetooth: Generic Bluetooth USB driver ver 0.4
[ 2709.570169] usbcore: registered new interface driver btusb
[ 2845.742781] BUG: unable to handle kernel paging request at 6b6b6c2f
[ 2845.742958] IP: [<c015515c>] __lock_acquire+0x6c/0xa80
[ 2845.743087] *pde = 00000000
[ 2845.743206] Oops: 0002 [#1] SMP
[ 2845.743377] last sysfs file: /sys/class/bluetooth/hci0/hci0:6/type
[ 2845.743742] Modules linked in: btusb netconsole snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss rfcomm l2cap bluetooth vfat fuse snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm pl2303 snd_timer psmouse usbserial snd 3c59x e100 serio_raw soundcore i2c_i801 intel_agp mii agpgart snd_page_alloc rtc_cmos rtc_core thermal processor rtc_lib button thermal_sys sg evdev
[ 2845.743742]
[ 2845.743742] Pid: 0, comm: swapper Not tainted (2.6.29-rc5-smp #54) Dell DM051
[ 2845.743742] EIP: 0060:[<c015515c>] EFLAGS: 00010002 CPU: 0
[ 2845.743742] EIP is at __lock_acquire+0x6c/0xa80
[ 2845.743742] EAX: 00000046 EBX: 00000046 ECX: 6b6b6b6b EDX: 00000002
[ 2845.743742] ESI: 6b6b6b6b EDI: 00000000 EBP: c064fd14 ESP: c064fcc8
[ 2845.743742]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 2845.743742] Process swapper (pid: 0, ti=c064e000 task=c05d1400 task.ti=c064e000)
[ 2845.743742] Stack:
[ 2845.743742]  c05d1400 00000002 c05d1400 00000001 00000002 00000000 f65388dc c05d1400
[ 2845.743742]  6b6b6b6b 00000292 c064fd0c c0153732 00000000 00000000 00000001 f700fa50
[ 2845.743742]  00000046 00000000 00000000 c064fd40 c0155be6 00000000 00000002 00000001
[ 2845.743742] Call Trace:
[ 2845.743742]  [<c0153732>] ? trace_hardirqs_on_caller+0x72/0x1c0
[ 2845.743742]  [<c0155be6>] ? lock_acquire+0x76/0xa0
[ 2845.743742]  [<c03e1aad>] ? skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c046c885>] ? _spin_lock_irqsave+0x45/0x80
[ 2845.743742]  [<c03e1aad>] ? skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c03e1aad>] ? skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c03e1f94>] ? skb_queue_purge+0x14/0x20
[ 2845.743742]  [<f8171f5a>] ? hci_conn_del+0x10a/0x1c0 [bluetooth]
[ 2845.743742]  [<f81399c9>] ? l2cap_disconn_ind+0x59/0xb0 [l2cap]
[ 2845.743742]  [<f81795ce>] ? hci_conn_del_sysfs+0x8e/0xd0 [bluetooth]
[ 2845.743742]  [<f8175758>] ? hci_event_packet+0x5f8/0x31c0 [bluetooth]
[ 2845.743742]  [<c03dfe19>] ? sock_def_readable+0x59/0x80
[ 2845.743742]  [<c046c14d>] ? _read_unlock+0x1d/0x20
[ 2845.743742]  [<f8178aa9>] ? hci_send_to_sock+0xe9/0x1d0 [bluetooth]
[ 2845.743742]  [<c015388b>] ? trace_hardirqs_on+0xb/0x10
[ 2845.743742]  [<f816fa6a>] ? hci_rx_task+0x2ba/0x490 [bluetooth]
[ 2845.743742]  [<c0133661>] ? tasklet_action+0x31/0xc0
[ 2845.743742]  [<c013367c>] ? tasklet_action+0x4c/0xc0
[ 2845.743742]  [<c0132eb7>] ? __do_softirq+0xa7/0x170
[ 2845.743742]  [<c0116dec>] ? ack_apic_level+0x5c/0x1c0
[ 2845.743742]  [<c0132fd7>] ? do_softirq+0x57/0x60
[ 2845.743742]  [<c01333dc>] ? irq_exit+0x7c/0x90
[ 2845.743742]  [<c01055bb>] ? do_IRQ+0x4b/0x90
[ 2845.743742]  [<c01333d5>] ? irq_exit+0x75/0x90
[ 2845.743742]  [<c010392c>] ? common_interrupt+0x2c/0x34
[ 2845.743742]  [<c010a14f>] ? mwait_idle+0x4f/0x70
[ 2845.743742]  [<c0101c05>] ? cpu_idle+0x65/0xb0
[ 2845.743742]  [<c045731e>] ? rest_init+0x4e/0x60
[ 2845.743742] Code: 0f 84 69 02 00 00 83 ff 07 0f 87 1e 06 00 00 85 ff 0f 85 08 05 00 00 8b 4d cc 8b 49 04 85 c9 89 4d d4 0f 84 f7 04 00 00 8b 75 d4 <f0> ff 86 c4 00 00 00 89 f0 e8 56 a9 ff ff 85 c0 0f 85 6e 03 00
[ 2845.743742] EIP: [<c015515c>] __lock_acquire+0x6c/0xa80 SS:ESP 0068:c064fcc8
[ 2845.743742] ---[ end trace 4c985b38f022279f ]---
[ 2845.743742] Kernel panic - not syncing: Fatal exception in interrupt
[ 2845.743742] ------------[ cut here ]------------
[ 2845.743742] WARNING: at kernel/smp.c:329 smp_call_function_many+0x151/0x200()
[ 2845.743742] Hardware name: Dell DM051
[ 2845.743742] Modules linked in: btusb netconsole snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss rfcomm l2cap bluetooth vfat fuse snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm pl2303 snd_timer psmouse usbserial snd 3c59x e100 serio_raw soundcore i2c_i801 intel_agp mii agpgart snd_page_alloc rtc_cmos rtc_core thermal processor rtc_lib button thermal_sys sg evdev
[ 2845.743742] Pid: 0, comm: swapper Tainted: G      D    2.6.29-rc5-smp #54
[ 2845.743742] Call Trace:
[ 2845.743742]  [<c012e076>] warn_slowpath+0x86/0xa0
[ 2845.743742]  [<c015041b>] ? trace_hardirqs_off+0xb/0x10
[ 2845.743742]  [<c0146384>] ? up+0x14/0x40
[ 2845.743742]  [<c012e661>] ? release_console_sem+0x31/0x1e0
[ 2845.743742]  [<c046c8ab>] ? _spin_lock_irqsave+0x6b/0x80
[ 2845.743742]  [<c015041b>] ? trace_hardirqs_off+0xb/0x10
[ 2845.743742]  [<c046c900>] ? _read_lock_irqsave+0x40/0x80
[ 2845.743742]  [<c012e7f2>] ? release_console_sem+0x1c2/0x1e0
[ 2845.743742]  [<c0146384>] ? up+0x14/0x40
[ 2845.743742]  [<c015041b>] ? trace_hardirqs_off+0xb/0x10
[ 2845.743742]  [<c046a3d7>] ? __mutex_unlock_slowpath+0x97/0x160
[ 2845.743742]  [<c046a563>] ? mutex_trylock+0xb3/0x180
[ 2845.743742]  [<c046a4a8>] ? mutex_unlock+0x8/0x10
[ 2845.743742]  [<c015b991>] smp_call_function_many+0x151/0x200
[ 2845.743742]  [<c010a1a0>] ? stop_this_cpu+0x0/0x40
[ 2845.743742]  [<c015ba61>] smp_call_function+0x21/0x30
[ 2845.743742]  [<c01137ae>] native_smp_send_stop+0x1e/0x50
[ 2845.743742]  [<c012e0f5>] panic+0x55/0x110
[ 2845.743742]  [<c01065a8>] oops_end+0xb8/0xc0
[ 2845.743742]  [<c010668f>] die+0x4f/0x70
[ 2845.743742]  [<c011a8c9>] do_page_fault+0x269/0x610
[ 2845.743742]  [<c011a660>] ? do_page_fault+0x0/0x610
[ 2845.743742]  [<c046cbaf>] error_code+0x77/0x7c
[ 2845.743742]  [<c015515c>] ? __lock_acquire+0x6c/0xa80
[ 2845.743742]  [<c0153732>] ? trace_hardirqs_on_caller+0x72/0x1c0
[ 2845.743742]  [<c0155be6>] lock_acquire+0x76/0xa0
[ 2845.743742]  [<c03e1aad>] ? skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c046c885>] _spin_lock_irqsave+0x45/0x80
[ 2845.743742]  [<c03e1aad>] ? skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c03e1aad>] skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c03e1f94>] skb_queue_purge+0x14/0x20
[ 2845.743742]  [<f8171f5a>] hci_conn_del+0x10a/0x1c0 [bluetooth]
[ 2845.743742]  [<f81399c9>] ? l2cap_disconn_ind+0x59/0xb0 [l2cap]
[ 2845.743742]  [<f81795ce>] ? hci_conn_del_sysfs+0x8e/0xd0 [bluetooth]
[ 2845.743742]  [<f8175758>] hci_event_packet+0x5f8/0x31c0 [bluetooth]
[ 2845.743742]  [<c03dfe19>] ? sock_def_readable+0x59/0x80
[ 2845.743742]  [<c046c14d>] ? _read_unlock+0x1d/0x20
[ 2845.743742]  [<f8178aa9>] ? hci_send_to_sock+0xe9/0x1d0 [bluetooth]
[ 2845.743742]  [<c015388b>] ? trace_hardirqs_on+0xb/0x10
[ 2845.743742]  [<f816fa6a>] hci_rx_task+0x2ba/0x490 [bluetooth]
[ 2845.743742]  [<c0133661>] ? tasklet_action+0x31/0xc0
[ 2845.743742]  [<c013367c>] tasklet_action+0x4c/0xc0
[ 2845.743742]  [<c0132eb7>] __do_softirq+0xa7/0x170
[ 2845.743742]  [<c0116dec>] ? ack_apic_level+0x5c/0x1c0
[ 2845.743742]  [<c0132fd7>] do_softirq+0x57/0x60
[ 2845.743742]  [<c01333dc>] irq_exit+0x7c/0x90
[ 2845.743742]  [<c01055bb>] do_IRQ+0x4b/0x90
[ 2845.743742]  [<c01333d5>] ? irq_exit+0x75/0x90
[ 2845.743742]  [<c010392c>] common_interrupt+0x2c/0x34
[ 2845.743742]  [<c010a14f>] ? mwait_idle+0x4f/0x70
[ 2845.743742]  [<c0101c05>] cpu_idle+0x65/0xb0
[ 2845.743742]  [<c045731e>] rest_init+0x4e/0x60
[ 2845.743742] ---[ end trace 4c985b38f02227a0 ]---
[ 2845.743742] ------------[ cut here ]------------
[ 2845.743742] WARNING: at kernel/smp.c:226 smp_call_function_single+0x8e/0x110()
[ 2845.743742] Hardware name: Dell DM051
[ 2845.743742] Modules linked in: btusb netconsole snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss rfcomm l2cap bluetooth vfat fuse snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm pl2303 snd_timer psmouse usbserial snd 3c59x e100 serio_raw soundcore i2c_i801 intel_agp mii agpgart snd_page_alloc rtc_cmos rtc_core thermal processor rtc_lib button thermal_sys sg evdev
[ 2845.743742] Pid: 0, comm: swapper Tainted: G      D W  2.6.29-rc5-smp #54
[ 2845.743742] Call Trace:
[ 2845.743742]  [<c012e076>] warn_slowpath+0x86/0xa0
[ 2845.743742]  [<c012e000>] ? warn_slowpath+0x10/0xa0
[ 2845.743742]  [<c015041b>] ? trace_hardirqs_off+0xb/0x10
[ 2845.743742]  [<c0146384>] ? up+0x14/0x40
[ 2845.743742]  [<c012e661>] ? release_console_sem+0x31/0x1e0
[ 2845.743742]  [<c046c8ab>] ? _spin_lock_irqsave+0x6b/0x80
[ 2845.743742]  [<c015041b>] ? trace_hardirqs_off+0xb/0x10
[ 2845.743742]  [<c046c900>] ? _read_lock_irqsave+0x40/0x80
[ 2845.743742]  [<c012e7f2>] ? release_console_sem+0x1c2/0x1e0
[ 2845.743742]  [<c0146384>] ? up+0x14/0x40
[ 2845.743742]  [<c015b7be>] smp_call_function_single+0x8e/0x110
[ 2845.743742]  [<c010a1a0>] ? stop_this_cpu+0x0/0x40
[ 2845.743742]  [<c026d23f>] ? cpumask_next_and+0x1f/0x40
[ 2845.743742]  [<c015b95a>] smp_call_function_many+0x11a/0x200
[ 2845.743742]  [<c010a1a0>] ? stop_this_cpu+0x0/0x40
[ 2845.743742]  [<c015ba61>] smp_call_function+0x21/0x30
[ 2845.743742]  [<c01137ae>] native_smp_send_stop+0x1e/0x50
[ 2845.743742]  [<c012e0f5>] panic+0x55/0x110
[ 2845.743742]  [<c01065a8>] oops_end+0xb8/0xc0
[ 2845.743742]  [<c010668f>] die+0x4f/0x70
[ 2845.743742]  [<c011a8c9>] do_page_fault+0x269/0x610
[ 2845.743742]  [<c011a660>] ? do_page_fault+0x0/0x610
[ 2845.743742]  [<c046cbaf>] error_code+0x77/0x7c
[ 2845.743742]  [<c015515c>] ? __lock_acquire+0x6c/0xa80
[ 2845.743742]  [<c0153732>] ? trace_hardirqs_on_caller+0x72/0x1c0
[ 2845.743742]  [<c0155be6>] lock_acquire+0x76/0xa0
[ 2845.743742]  [<c03e1aad>] ? skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c046c885>] _spin_lock_irqsave+0x45/0x80
[ 2845.743742]  [<c03e1aad>] ? skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c03e1aad>] skb_dequeue+0x1d/0x70
[ 2845.743742]  [<c03e1f94>] skb_queue_purge+0x14/0x20
[ 2845.743742]  [<f8171f5a>] hci_conn_del+0x10a/0x1c0 [bluetooth]
[ 2845.743742]  [<f81399c9>] ? l2cap_disconn_ind+0x59/0xb0 [l2cap]
[ 2845.743742]  [<f81795ce>] ? hci_conn_del_sysfs+0x8e/0xd0 [bluetooth]
[ 2845.743742]  [<f8175758>] hci_event_packet+0x5f8/0x31c0 [bluetooth]
[ 2845.743742]  [<c03dfe19>] ? sock_def_readable+0x59/0x80
[ 2845.743742]  [<c046c14d>] ? _read_unlock+0x1d/0x20
[ 2845.743742]  [<f8178aa9>] ? hci_send_to_sock+0xe9/0x1d0 [bluetooth]
[ 2845.743742]  [<c015388b>] ? trace_hardirqs_on+0xb/0x10
[ 2845.743742]  [<f816fa6a>] hci_rx_task+0x2ba/0x490 [bluetooth]
[ 2845.743742]  [<c0133661>] ? tasklet_action+0x31/0xc0
[ 2845.743742]  [<c013367c>] tasklet_action+0x4c/0xc0
[ 2845.743742]  [<c0132eb7>] __do_softirq+0xa7/0x170
[ 2845.743742]  [<c0116dec>] ? ack_apic_level+0x5c/0x1c0
[ 2845.743742]  [<c0132fd7>] do_softirq+0x57/0x60
[ 2845.743742]  [<c01333dc>] irq_exit+0x7c/0x90
[ 2845.743742]  [<c01055bb>] do_IRQ+0x4b/0x90
[ 2845.743742]  [<c01333d5>] ? irq_exit+0x75/0x90
[ 2845.743742]  [<c010392c>] common_interrupt+0x2c/0x34
[ 2845.743742]  [<c010a14f>] ? mwait_idle+0x4f/0x70
[ 2845.743742]  [<c0101c05>] cpu_idle+0x65/0xb0
[ 2845.743742]  [<c045731e>] rest_init+0x4e/0x60
[ 2845.743742] ---[ end trace 4c985b38f02227a1 ]---
[ 2845.743742] Rebooting in 3 seconds..

My logitec bluetooth mouse trying connect to pc, but
pc side reject the connection again and again. then panic happens.

The reason is due to hci_conn_del_sysfs now called in hci_event_packet,
the del work is done in a workqueue, so it's possible done before
skb_queue_purge called.

I move the hci_conn_del_sysfs after skb_queue_purge just as that before
marcel's commit.

Remove the hci_conn_del_sysfs in hci_conn_hash_flush as well due to
hci_conn_del will deal with the work.
Signed-off-by: NDave Young <hidave.darkstar@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Userspace pairing code can be simplified if it doesn't have to fall
back to using L2CAP_LM in the case of L2CAP raw sockets. This patch
allows the BT_SECURITY socket option to be used for these sockets.
Signed-off-by: NJohan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The CID value of L2CAP sockets need to be set to zero. All userspace
applications do this via memset() on the sockaddr_l2 structure. The
RFCOMM implementation uses in-kernel L2CAP sockets and so it has to
make sure that l2_cid is set to zero.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>