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path: root/include/net/bluetooth/l2cap.h
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2012-06-05Bluetooth: A2MP: Handling fixed channelsAndrei Emeltchenko1-0/+1
A2MP fixed channel do not have sk Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-06-05Bluetooth: A2MP: Create A2MP channelAndrei Emeltchenko1-0/+6
Create and initialize fixed A2MP channel Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-06-05Bluetooth: Add l2cap_chan->ops->ready()Andrei Emeltchenko1-0/+1
This move socket specific code to l2cap_sock.c. Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-06-05Bluetooth: Move clean up code and set of SOCK_ZAPPED to l2cap_sock.cAndrei Emeltchenko1-0/+1
This remove a bit more of socket code from l2cap core, this calls set the SOCK_ZAPPED and do some clean up depending on the socket state. Reported-by: Mat Martineau <[email protected]> Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-06-05Bluetooth: Use chan as parameters for l2cap chan opsGustavo Padovan1-4/+6
Use chan instead of void * makes more sense here. Signed-off-by: Gustavo Padovan <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-06-05Bluetooth: Define and use PSM identifiersAndrei Emeltchenko1-0/+4
Define assigned Protocol and Service Multiplexor (PSM) identifiers and use them instead of magic numbers. Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-06-05Bluetooth: Define L2CAP conf continuation flagAndrei Emeltchenko1-0/+3
Define Continuation flag which the only flag used from Flags field in L2CAP Configuration Request and Response. Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-06-05Bluetooth: Remove unused ERTM control field macrosMat Martineau1-168/+0
Now that l2cap_ctrl is used to set up control fields, these macros are not needed. Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-06-05Bluetooth: Check rules when setting retransmit or monitor timersMat Martineau1-4/+0
The ERTM specification requires the retransmit timer to be cancelled when the monitor timer is set. The retransmit timer cannot be set again while the monitor timer is pending. Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-06-05Bluetooth: Remove receive code that has been supercededMat Martineau1-8/+0
This deletes the receive code that had handlers for each frame type at the top level, and then had logic to determine the receive state within each handler. Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-06-05Bluetooth: Fix early return from l2cap_chan_delMat Martineau1-0/+1
This fixes a regression from commit 2ead70b8390d199ca04cd35311b51f5f3676079e that is present in all kernels starting at v3.0. When L2CAP information was moved to struct l2cap_chan, a check was added to l2cap_chan_del to avoid certain cleanup operations when ERTM or streaming mode had not yet been initialized. The logic in the check did not take in to account that chan->conf_state is set to 0 in l2cap_chan_ready, so l2cap_chan_del failed to cancel timers and leaked memory any time the ERTM queues or lists were not empty. This change makes sure that l2cap_chan_del only returns early if ERTM initialization was not performed. Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-05-09Bluetooth: Refactor L2CAP ERTM and streaming transmit segmentationMat Martineau1-0/+1
Use more common code for ERTM and streaming mode segmentation and transmission, and begin using skb control block data for delaying extended or enhanced header generation until just before the packet is transmitted. This code is also better suited for resegmentation, which is needed when L2CAP links are reconfigured after an AMP channel move. Signed-off-by: Mat Martineau <[email protected]> Reviewed-by: Ulisses Furquim <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-05-09Bluetooth: Improve ERTM sequence number offset calculationMat Martineau1-7/+4
Instead of using modular division, the offset can be calculated using only addition and subtraction. The previous calculation did not work as intended and was more difficult to understand, involving unsigned integer underflow and a check for a negative value where one was not possible. Signed-off-by: Mat Martineau <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-05-09Bluetooth: Use address type info from user-spaceAndre Guedes1-1/+1
In order to establish a LE connection we need the address type information. User-space already pass this information to kernel through struct sockaddr_l2. This patch adds the dst_type parameter to l2cap_chan_connect so we are able to pass the address type info from user-space down to hci_conn layer. Signed-off-by: Andre Guedes <[email protected]> Acked-by: Johan Hedberg <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-05-09Bluetooth: Add address type to struct sockaddr_l2Andre Guedes1-0/+1
This patch adds the address type info to struct sockaddr_l2 so user-space can inform the remote device address type required to establish LE connections. Soon, instead of looking the advertising cache up to discover the address type, we'll use this address type info to establish LE connections. Signed-off-by: Andre Guedes <[email protected]> Acked-by: Johan Hedberg <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-05-09Bluetooth: trivial: Remove empty lineAndrei Emeltchenko1-1/+0
Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-05-09Bluetooth: Add the l2cap_seq_list structure for tracking framesMat Martineau1-0/+12
A sequence list is a data structure used to track frames that need to be retransmitted, and frames that have been requested for retransmission by the remote device. It can compactly represent a list of sequence numbers within the ERTM transmit window. Memory for the list is allocated once at connection time, and common operations in ERTM are O(1). Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2012-05-09Bluetooth: Remove err parameter from alloc_skb()Gustavo Padovan1-1/+1
Use ERR_PTR maginc instead. Signed-off-by: Gustavo Padovan <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-05-09Bluetooth: Adds set_default function in L2CAP setupAndrei Emeltchenko1-0/+1
Some parameters in L2CAP chan are set to default similar way in socket based channels and A2MP channels. Adds common function which sets all defaults. Signed-off-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-05-09Bluetooth: Remove sk parameter from l2cap_chan_create()Gustavo Padovan1-1/+1
Following the separation if core and sock code this change avoid manipulation of sk inside l2cap_chan_create(). Signed-off-by: Gustavo Padovan <[email protected]>
2012-05-09Bluetooth: Add definitions and struct members for new ERTM state machineMat Martineau1-0/+49
Adds some missing values for control field parsing, additional data for the new state machine, and enumerations for states, incoming packet classification, and state machine events. Signed-off-by: Mat Martineau <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-05-09Bluetooth: Comments and style fixesAndrei Emeltchenko1-3/+8
Add comments to timer implementation and style fixes. Signed-off-by: Andrei Emeltchenko <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo Padovan <[email protected]>
2012-03-07Bluetooth: Fix coding style in all .h filesGustavo F. Padovan1-26/+26
Proper align the struct definitions. Signed-off-by: Gustavo F. Padovan <[email protected]>
2012-03-02Bluetooth: Update L2CAP timeout constants to use msecs_to_jiffiesMarcel Holtmann1-5/+5
The L2CAP timeout constants are always used in form of jiffies. So just include the conversion from msecs in the define itself. This has the advantage of making the code where the timeout is used more readable. Signed-off-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-02-29Bluetooth: Save remote L2CAP fixed channel maskAndrei Emeltchenko1-0/+1
Fixed channel mask needs to be stored to decide whether to use A2MP for example. So far save only one relevant byte which keeps all information we need. Signed-off-by: Andrei Emeltchenko <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-02-23Bluetooth: Add l2cap_chan_lockAndrei Emeltchenko1-0/+11
Channel lock will be used to lock L2CAP channels which are locked currently by socket locks. Signed-off-by: Andrei Emeltchenko <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Reviewed-by: Ulisses Furquim <[email protected]> Acked-by: Gustavo F. Padovan <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-02-17Bluetooth: Use symbolic names for state in debugAndrei Emeltchenko1-1/+2
Use state_to_string function in debug statements. Signed-off-by: Andrei Emeltchenko <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-02-13Bluetooth: Remove usage of __cancel_delayed_work()Ulisses Furquim1-2/+2
__cancel_delayed_work() is being used in some paths where we cannot sleep waiting for the delayed work to finish. However, that function might return while the timer is running and the work will be queued again. Replace the calls with safer cancel_delayed_work() version which spins until the timer handler finishes on other CPUs and cancels the delayed work. Signed-off-by: Ulisses Furquim <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-02-13Bluetooth: Add alloc_skb chan operatorAndrei Emeltchenko1-0/+3
Add channel-specific skb allocation method Signed-off-by: Andrei Emeltchenko <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-02-13Bluetooth: Make l2cap_clear_timer return if timer was running or notSzymon Janc1-2/+7
This is usefull when need to make action after timer was cleared depending on if it was running or not. Signed-off-by: Szymon Janc <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-02-13Bluetooth: Remove bogus inline declaration from l2cap_chan_connectJohan Hedberg1-1/+1
As reported by Dan Carpenter this function causes a Sparse warning and shouldn't be declared inline: include/net/bluetooth/l2cap.h:837:30 error: marked inline, but without a definition" Reported-by: Dan Carpenter <[email protected]> Signed-off-by: Johan Hedberg <[email protected]> Acked-by: Marcel Holtmann <[email protected]>
2012-02-13Bluetooth: l2cap_set_timer needs jiffies as timeout valueAndrzej Kaczmarek1-3/+3
After moving L2CAP timers to workqueues l2cap_set_timer expects timeout value to be specified in jiffies but constants defined in miliseconds are used. This makes timeouts unreliable when CONFIG_HZ is not set to 1000. __set_chan_timer macro still uses jiffies as input to avoid multiple conversions from/to jiffies for sk_sndtimeo value which is already specified in jiffies. Signed-off-by: Andrzej Kaczmarek <[email protected]> Ackec-by: Marcel Holtmann <[email protected]> Signed-off-by: Johan Hedberg <[email protected]>
2012-01-03Merge branch 'master' of ↵John W. Linville1-8/+38
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem Conflicts: drivers/net/wireless/b43/dma.c drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c
2011-12-22Bluetooth: Fix deadlocks with sock lock and L2CAP timers locksUlisses Furquim1-8/+21
When cancelling a delayed work (timer) in L2CAP we can not sleep holding the sock mutex otherwise we might deadlock with an L2CAP timer handler. This is possible because RX/TX and L2CAP timers run in different workqueues. The scenario below illustrates the problem. Thus we are now avoiding to sleep on the timers locks. ====================================================== [ INFO: possible circular locking dependency detected ] 3.1.0-05270-ga978dc7-dirty #239 ------------------------------------------------------- kworker/1:1/873 is trying to acquire lock: (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+...}, at: [<ffffffffa002ceac>] l2cap_chan_timeout+0x3c/0xe0 [bluetooth] but task is already holding lock: ((&(&chan->chan_timer)->work)){+.+...}, at: [<ffffffff81051a86>] process_one_work+0x126/0x450 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 ((&(&chan->chan_timer)->work)){+.+...}: [<ffffffff8106b276>] check_prevs_add+0xf6/0x170 [<ffffffff8106b903>] validate_chain+0x613/0x790 [<ffffffff8106dfee>] __lock_acquire+0x4be/0xac0 [<ffffffff8106ec2d>] lock_acquire+0x8d/0xb0 [<ffffffff81052a6f>] wait_on_work+0x4f/0x160 [<ffffffff81052ca3>] __cancel_work_timer+0x73/0x80 [<ffffffff81052cbd>] cancel_delayed_work_sync+0xd/0x10 [<ffffffffa002f2ed>] l2cap_chan_connect+0x22d/0x470 [bluetooth] [<ffffffffa002fb51>] l2cap_sock_connect+0xb1/0x140 [bluetooth] [<ffffffff8130811b>] kernel_connect+0xb/0x10 [<ffffffffa00cf98a>] rfcomm_session_create+0x12a/0x1c0 [rfcomm] [<ffffffffa00cfbe7>] __rfcomm_dlc_open+0x1c7/0x240 [rfcomm] [<ffffffffa00d07c2>] rfcomm_dlc_open+0x42/0x70 [rfcomm] [<ffffffffa00d3b03>] rfcomm_sock_connect+0x103/0x150 [rfcomm] [<ffffffff8130bd7e>] sys_connect+0xae/0xc0 [<ffffffff813368d2>] compat_sys_socketcall+0xb2/0x220 [<ffffffff813b2089>] sysenter_dispatch+0x7/0x30 -> #0 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+...}: [<ffffffff8106b16d>] check_prev_add+0x6cd/0x6e0 [<ffffffff8106b276>] check_prevs_add+0xf6/0x170 [<ffffffff8106b903>] validate_chain+0x613/0x790 [<ffffffff8106dfee>] __lock_acquire+0x4be/0xac0 [<ffffffff8106ec2d>] lock_acquire+0x8d/0xb0 [<ffffffff8130d91a>] lock_sock_nested+0x8a/0xa0 [<ffffffffa002ceac>] l2cap_chan_timeout+0x3c/0xe0 [bluetooth] [<ffffffff81051ae4>] process_one_work+0x184/0x450 [<ffffffff8105276e>] worker_thread+0x15e/0x340 [<ffffffff81057bb6>] kthread+0x96/0xa0 [<ffffffff813b1ef4>] kernel_thread_helper+0x4/0x10 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((&(&chan->chan_timer)->work)); lock(sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP); lock((&(&chan->chan_timer)->work)); lock(sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP); *** DEADLOCK *** 2 locks held by kworker/1:1/873: #0: (events){.+.+.+}, at: [<ffffffff81051a86>] process_one_work+0x126/0x450 #1: ((&(&chan->chan_timer)->work)){+.+...}, at: [<ffffffff81051a86>] process_one_work+0x126/0x450 stack backtrace: Pid: 873, comm: kworker/1:1 Not tainted 3.1.0-05270-ga978dc7-dirty #239 Call Trace: [<ffffffff813a0f6e>] print_circular_bug+0xd2/0xe3 [<ffffffff8106b16d>] check_prev_add+0x6cd/0x6e0 [<ffffffff8106b276>] check_prevs_add+0xf6/0x170 [<ffffffff8106b903>] validate_chain+0x613/0x790 [<ffffffff8106dfee>] __lock_acquire+0x4be/0xac0 [<ffffffff8130d8f6>] ? lock_sock_nested+0x66/0xa0 [<ffffffff8106ea30>] ? lock_release_nested+0x100/0x110 [<ffffffff8130d8f6>] ? lock_sock_nested+0x66/0xa0 [<ffffffff8106ec2d>] lock_acquire+0x8d/0xb0 [<ffffffffa002ceac>] ? l2cap_chan_timeout+0x3c/0xe0 [bluetooth] [<ffffffff8130d91a>] lock_sock_nested+0x8a/0xa0 [<ffffffffa002ceac>] ? l2cap_chan_timeout+0x3c/0xe0 [bluetooth] [<ffffffff81051a86>] ? process_one_work+0x126/0x450 [<ffffffffa002ceac>] l2cap_chan_timeout+0x3c/0xe0 [bluetooth] [<ffffffff81051ae4>] process_one_work+0x184/0x450 [<ffffffff81051a86>] ? process_one_work+0x126/0x450 [<ffffffffa002ce70>] ? l2cap_security_cfm+0x4e0/0x4e0 [bluetooth] [<ffffffff8105276e>] worker_thread+0x15e/0x340 [<ffffffff81052610>] ? manage_workers+0x110/0x110 [<ffffffff81057bb6>] kthread+0x96/0xa0 [<ffffffff813b1ef4>] kernel_thread_helper+0x4/0x10 [<ffffffff813af69d>] ? retint_restore_args+0xe/0xe [<ffffffff81057b20>] ? __init_kthread_worker+0x70/0x70 [<ffffffff813b1ef0>] ? gs_change+0xb/0xb Signed-off-by: Ulisses Furquim <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-12-20Bluetooth: Rename info_work to info_timerGustavo F. Padovan1-1/+1
It makes more sense this way, since info_timer is a timer using delayed work API. Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-12-20Bluetooth: convert security timer to delayed_workGustavo F. Padovan1-1/+1
This one also needs to run in process context Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-12-20Bluetooth: Move l2cap_{set,clear}_timer to l2cap.hGustavo F. Padovan1-0/+15
It is the only place where it is used. Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-12-19module_param: make bool parameters really bool (net & drivers/net)Rusty Russell1-1/+1
module_param(bool) used to counter-intuitively take an int. In fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy trick. It's time to remove the int/unsigned int option. For this version it'll simply give a warning, but it'll break next kernel version. (Thanks to Joe Perches for suggesting coccinelle for 0/1 -> true/false). Cc: "David S. Miller" <[email protected]> Cc: [email protected] Signed-off-by: Rusty Russell <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2011-12-18Bluetooth: invert locking order in connect pathGustavo F. Padovan1-1/+2
This move some checking code that was in l2cap_sock_connect() to l2cap_chan_connect(). Thus we can invert the lock calls, i.e., call lock_sock() before hci_dev_lock() to avoid a deadlock scenario. Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-12-18Bluetooth: convert info timer to delayed_workGustavo F. Padovan1-1/+1
Another step of remove interrupt context from Bluetooth Core. Use the system workqueue. Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-12-18Bluetooth: convert chan_lock to mutexGustavo F. Padovan1-1/+1
spin lock doesn't fit ok anymore on the new code based on workqueues. Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-12-18Bluetooth: Move L2CAP timers to workqueueGustavo F. Padovan1-8/+9
L2CAP timers also need to run in process context. As the works in l2cap are small we are using the system worqueue. Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-11-16Bluetooth: Move scope of kernel parameter enable_hsAndrei Emeltchenko1-1/+0
Signed-off-by: Andrei Emeltchenko <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-11-10Bluetooth: Rename l2cap_check_security()Gustavo F. Padovan1-0/+1
rename to l2cap_chan_check_security() to make it consistent with other l2cap_exported functions. This function will be exported in a later commit. Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-11-09Merge branch 'master' of ↵John W. Linville1-54/+355
git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-next Conflicts: net/bluetooth/l2cap_sock.c net/bluetooth/mgmt.c
2011-11-07Bluetooth: Add definitions for L2CAP fixed channelsMat Martineau1-0/+4
Symbolic fixed channel IDs will be used instead of magic numbers. Signed-off-by: Mat Martineau <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Acked-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-11-07Bluetooth: Add AMP-related data and structures for channel signalsMat Martineau1-2/+52
AMP channel creation and channel moves are coordinated using the L2CAP signaling channel. These definitions cover the "create channel", "move channel", and "move channel confirm" signals. Signed-off-by: Mat Martineau <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Acked-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-11-07Bluetooth: Add channel policy to getsockopt/setsockoptMat Martineau1-0/+1
Each channel has a policy to require BR/EDR (the default), prefer BR/EDR, or prefer AMP. Check for valid policy value and L2CAP mode. Signed-off-by: Mat Martineau <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Acked-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-11-07Bluetooth: Change scope of the enable_hs module parameterMat Martineau1-0/+1
This variable is currently only accessible within l2cap_core.c, but it is also needed in l2cap_sock.c Signed-off-by: Mat Martineau <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Acked-by: Andrei Emeltchenko <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
2011-11-07Bluetooth: prioritizing data over HCILuiz Augusto von Dentz1-0/+1
This implement priority based scheduler using skbuffer priority set via SO_PRIORITY socket option. It introduces hci_chan_hash (list of HCI Channel/hci_chan) per connection, each item in this list refer to a L2CAP connection and it is used to queue the data for transmission. Signed-off-by: Luiz Augusto von Dentz <[email protected]> Acked-by: Marcel Holtmann <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]>
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