| Commit message (Collapse) | Author | Age | Files | Lines |
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The function was quite big. This splits out beacon
updating into a separate function for improved
maintenance and extension.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Send Channel Availability Check time as a parameter
of start_radar_detection() callback.
Get CAC time from regulatory database.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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While framing the TDLS Setup Confirmation frame, the driver needs to
know if the TDLS peer is VHT/HT/WMM capable and thus shall construct
the VHT/HT operation / WMM parameter elements accordingly. Supplicant
determines if the TDLS peer is VHT/HT/WMM capable based on the
presence of the respective IEs in the received TDLS Setup Response frame.
The host driver should not need to parse the received TDLS Response
frame and thus, should be able to rely on the supplicant to indicate
the capability of the peer through additional flags while transmitting
the TDLS Setup Confirmation frame through tdls_mgmt operations.
Signed-off-by: Sunil Dutt Undekari <usdutt@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
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When the driver cannot start the AP or when the assignement
of the beacon goes wrong, we need to unassign the vif.
Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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sdata->u.ap.request_smps_work can’t be flushed synchronously
under wdev_lock(wdev) since ieee80211_request_smps_ap_work
itself locks the same lock.
While at it, reset the driver_smps_mode when the ap is
stopped to its default: OFF.
This solves:
======================================================
[ INFO: possible circular locking dependency detected ]
3.12.0-ipeer+ #2 Tainted: G O
-------------------------------------------------------
rmmod/2867 is trying to acquire lock:
((&sdata->u.ap.request_smps_work)){+.+...}, at: [<c105b8d0>] flush_work+0x0/0x90
but task is already holding lock:
(&wdev->mtx){+.+.+.}, at: [<f9b32626>] cfg80211_stop_ap+0x26/0x230 [cfg80211]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&wdev->mtx){+.+.+.}:
[<c10aefa9>] lock_acquire+0x79/0xe0
[<c1607a1a>] mutex_lock_nested+0x4a/0x360
[<fb06288b>] ieee80211_request_smps_ap_work+0x2b/0x50 [mac80211]
[<c105cdd8>] process_one_work+0x198/0x450
[<c105d469>] worker_thread+0xf9/0x320
[<c10669ff>] kthread+0x9f/0xb0
[<c1613397>] ret_from_kernel_thread+0x1b/0x28
-> #0 ((&sdata->u.ap.request_smps_work)){+.+...}:
[<c10ae9df>] __lock_acquire+0x183f/0x1910
[<c10aefa9>] lock_acquire+0x79/0xe0
[<c105b917>] flush_work+0x47/0x90
[<c105d867>] __cancel_work_timer+0x67/0xe0
[<c105d90f>] cancel_work_sync+0xf/0x20
[<fb0765cc>] ieee80211_stop_ap+0x8c/0x340 [mac80211]
[<f9b3268c>] cfg80211_stop_ap+0x8c/0x230 [cfg80211]
[<f9b0d8f9>] cfg80211_leave+0x79/0x100 [cfg80211]
[<f9b0da72>] cfg80211_netdev_notifier_call+0xf2/0x4f0 [cfg80211]
[<c160f2c9>] notifier_call_chain+0x59/0x130
[<c106c6de>] __raw_notifier_call_chain+0x1e/0x30
[<c106c70f>] raw_notifier_call_chain+0x1f/0x30
[<c14f8213>] call_netdevice_notifiers_info+0x33/0x70
[<c14f8263>] call_netdevice_notifiers+0x13/0x20
[<c14f82a4>] __dev_close_many+0x34/0xb0
[<c14f83fe>] dev_close_many+0x6e/0xc0
[<c14f9c77>] rollback_registered_many+0xa7/0x1f0
[<c14f9dd4>] unregister_netdevice_many+0x14/0x60
[<fb06f4d9>] ieee80211_remove_interfaces+0xe9/0x170 [mac80211]
[<fb055116>] ieee80211_unregister_hw+0x56/0x110 [mac80211]
[<fa3e9396>] iwl_op_mode_mvm_stop+0x26/0xe0 [iwlmvm]
[<f9b9d8ca>] _iwl_op_mode_stop+0x3a/0x70 [iwlwifi]
[<f9b9d96f>] iwl_opmode_deregister+0x6f/0x90 [iwlwifi]
[<fa405179>] __exit_compat+0xd/0x19 [iwlmvm]
[<c10b8bf9>] SyS_delete_module+0x179/0x2b0
[<c1613421>] sysenter_do_call+0x12/0x32
Fixes: 687da132234f ("mac80211: implement SMPS for AP")
Cc: <stable@vger.kernel.org> [3.13]
Reported-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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ieee80211_start_roc_work() might add a new roc
to existing roc, and tell cfg80211 it has already
started.
However, this might happen before the roc cookie
was set, resulting in REMAIN_ON_CHANNEL (started)
event with null cookie. Consequently, it can make
wpa_supplicant go out of sync.
Fix it by setting the roc cookie earlier.
Cc: stable@vger.kernel.org
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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We already have a band variable, so the new one is just
shadowing it, but the existing one already holds the
same value so just remove the inner one.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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ieee80211_rx_status.flags is full. Define a new vht_flag
variable to be able to set more VHT related flags and make
room in flags.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Acked-by: Kalle Valo <kvalo@qca.qualcomm.com> [ath10k]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Update the operating mode field is needed when an association
request contains the operating mode notification element and
it's not just changed later on the fly.
Signed-off-by: Marek Kwaczynski <marek.kwaczynski@tieto.com>
[clarify commit log, comments & fix whitespace]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The patch adds a missing sdata lock and adds a few
lockdeps for easier maintenance.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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radar_required setting wasn't protected by
local->mtx in some places. This should prevent
from scanning/radar detection/roc colliding.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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If CSA for AP interface failed and the interface
was not stopped afterwards another CSA request
would leak sdata->u.ap.next_beacon.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Instead of having
ieee80211_bss_info_change_notify() scattered all
over the place just call it once when finalizing
CSA.
As a side effect this patch adds missing error
checking for IBSS CSA beacon update.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
[fix err vs. changed variable usage in ieee80211_csa_finalize()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The wiphy privid (to identify wiphys) and the cfg80211
ops should both be const, so change them to be.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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In case the given ROC duration is 0, update it to a minimal value before
setting the ieee80211_roc_work parameters, so it also would be valid
for cases where scan is in progress or there are other ROCs queued.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The mesh_id is an array so can't ever be NULL, it looks
like mesh_id_len check was intended instead. However,
since the previous patch, cfg80211 does the check, so
just remove it here.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The mesh precedence value in ieee80211_channel_switch
should be incremented or set to 1 only if this is the
initiator of mesh channel switch. For non-initiator,
the precedence value has updated using the Mesh
Channel Switch Parameters element. Fix this.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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A beacon should never have a Channel Switch Announcement information
element with a count of 0, because a count of 1 means switch just
before the next beacon. So, if a count of 0 was valid in a beacon, it
would have been transmitted in the next channel already, which is
useless. A CSA count equal to zero is only meaningful in action
frames or probe_responses.
Fix the ieee80211_csa_is_complete() and ieee80211_update_csa()
functions accordingly.
With a CSA count of 0, we won't transmit any CSA beacons, because the
switch will happen before the next TBTT. To avoid extra work and
potential confusion in the drivers, complete the CSA immediately,
instead of waiting for the driver to call ieee80211_csa_finish().
To keep things simpler, we also switch immediately when the CSA count
is 1, while in theory we should delay the switch until just before the
next TBTT.
Additionally, move the ieee80211_csa_finish() function to cfg.c,
where it makes more sense.
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Acked-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Refactor ieee80211_mesh_process_chanswitch() to use
ieee80211_channel_switch() and avoid code duplication.
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Acked-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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On starting a mesh or AP BSS, the interface dtim_count
countdown should match that of the driver TSF.
Signed-off-by: Thomas Pedersen <twpedersen@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Since the RTNL can't always be held, use wdev/sdata locking for
the qos-map dereference in mac80211. This requires cfg80211 to
consistently lock it, which it was missing in one place.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Implement set_qos_map() handler for mac80211 to enable QoS mapping
functionality.
Signed-off-by: Kyeyoon Park <kyeyoonp@qca.qualcomm.com>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The scan code creates an iflist_mtx -> mtx locking dependency,
and a few other places, notably radar detection, were creating
the opposite dependency, causing lockdep to complain. As scan
and radar detection are mutually exclusive, the deadlock can't
really happen in practice, but it's still bad form.
A similar issue exists in the monitor mode code, but this is
only used by channel-context drivers right now and those have
to have hardware scan, so that also can't happen.
Still, fix these issues by making some of the channel context
code require the mtx to be held rather than acquiring it, thus
allowing the monitor/radar callers to keep the iflist_mtx->mtx
lock ordering.
While at it, also fix access to the local->scanning variable
in the radar code, and document that radar_detect_enabled is
now properly protected by the mtx.
All this would now introduce an ABBA deadlock between the DFS
work cancelling and local->mtx, so change the locking there a
bit to not need to use cancel_delayed_work_sync() but be able
to just use cancel_delayed_work(). The work is also safely
stopped/removed when the interface is stopped, so no extra
changes are needed.
Reported-by: Kalle Valo <kvalo@qca.qualcomm.com>
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The radar detection code changed a few times, and due to
the changes some iflist_mtx locking stayed in that isn't
actually necessary - remove it.
One version of the code needed it because an AP interface's
VLAN list was changed to use this, but then we moved the
list handling outside of the chanctx handling and thus the
locking was no longer needed.
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Allow to read management keys stored in a station's gtk key
array with a get_key function.
Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Verify that a pairwise key index value on ieee80211_get_key call
doesn't exceed the boundaries of the pairwise key array.
Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Refactor ieee80211_ibss_process_chanswitch() to use
ieee80211_channel_switch() and avoid code duplication.
Tested by: Simon Wunderlich <sw@simonwunderlich.de>
Acked by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This function is not used anywhere else than in cfg.c, so there's no
need to export it.
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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When the AP interface is stopped, free all AP and VLAN keys at
once to only require synchronize_net() once. Since that does
synchronize_net(), also move two such calls into the function
(using the new force_synchronize parameter) to avoid doing it
twice.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Teach sta_info_flush() to optionally also remove stations
from all VLANs associated with an AP interface to optimise
the station removal (in particular, synchronize_net().)
To not have to add the vlans argument throughout, do some
refactoring.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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If we can assume that stations are never referenced by the
driver after sta_state returns (and this is true since the
previous iwlmvm patch and for all other drivers) then we
don't need to delay station destruction, and don't need to
play tricks with rcu_barrier() etc.
This should speed up some scenarios like hostapd shutdown.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
drivers/net/wireless/brcm80211/Kconfig
net/mac80211/util.c
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Mesh STA receiving the mesh CSA action frame is not able to trigger
the mesh channel switch due to the incorrect handling and comparison
of mesh channel switch parameters element (MCSP)'s TTL. Make sure
the MCSP's TTL is updated accordingly before calling the
ieee80211_mesh_process_chnswitch. Also, we update the beacon before
forwarding the CSA action frame, so MCSP's precedence value and
initiator flag need to be updated prior to this.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Mesh beacon was not being rebuild after user triggered a mesh
powersave change.
To solve this issue use ieee80211_mbss_info_change_notify instead
of ieee80211_bss_info_change_notify. This helper function forces
mesh beacon to be rebuild and then notifies the driver about the
beacon change.
Signed-off-by: Javier Lopez <jlopex@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This reverts commit ee1f668136b2fb6640ee2d54c2a525ea41f98211.
The aformentioned commit added a check to allow
'iw wlan0 set power_save off' to work for mesh interfaces.
However, this is problematic because it also allows
'iw wlan0 set power_save on', which will crash in short order
because all of the subsequent code manipulates sdata->u.mgd.
The power-saving states for mesh interfaces can be manipulated
through the mesh config, e.g:
'iw wlan0 set mesh_param mesh_power_save=active' (which,
despite the name, actualy disables power saving since the
setting refers to the type of sleep the interface undergoes).
Cc: stable@vger.kernel.org
Fixes: ee1f668136b2 ("mac80211: allow disable power save in mesh")
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Rename NL80211_TXRATE_MCS to NL80211_TXRATE_HT and also
rename mcs to ht_mcs in struct cfg80211_bitrate_mask.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
[reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The current channel switch code has a potential deadlock:
1) * cfg80211_stop_ap acquires wdev-lock
* ieee80211_stop_ap calls cancel_work_sync for the csa_finalize_work,
which acquires the associated worker-lock
2) * ieee80211_csa_finalize_work holds the worker-lock when run
* it calls cfg80211_ch_switch_notify which will claim the wdev-lock,
and also needs to claim the sdata-lock (which is the same as the
wdev-lock) to modify the beacons.
It is sufficient to just set the channel switch active to false. If the
worker is running later, it will find the channel switch to not be
active anymore and returns immediately without changing anything.
Canceling the worker is done anyway when the interface goes down
(ieee80211_do_stop).
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The channel switch notification should be sent under the
wdev/sdata-lock, preferably in the same moment as the channel change
happens, to avoid races by other callers (e.g. start/stop_ap).
This also adds the previously missing sdata_lock protection in
csa_finalize_work.
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The csa finalize worker needs to change the beacon information (for
different modes). These are normally protected under rtnl lock, but the
csa finalize worker is called by drivers and should not acquire the RTNL
lock. Therefore change access protection for beacons to sdata/wdev lock.
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
[fix sdata_dereference]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Change cfg80211 and mac80211 to use cfg80211_mgmt_tx_params
struct to aggregate parameters for mgmt_tx functions.
This makes the functions' signatures less clumsy and allows
less painful parameters extension.
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
[fix all other drivers]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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There is no reason why we should have only one channel switch
announcement at a time for a single phy. When support for channel
switch with multiple contexts and multiple vifs per context is
implemented, we will need the chandef data for each vif. Move the
csa_chandef structure to sdata to prepare for this.
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
[Fixed compilation with mesh]
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Use put_unaligned_le16 in mesh_plink_frame_tx.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This adds generic cipher scheme support to mac80211, such schemes
are fully under control by the driver. On hw registration drivers
may specify additional HW ciphers with a scheme how these ciphers
have to be handled by mac80211 TX/RR. A cipher scheme specifies a
cipher suite value, a size of the security header to be added to
or stripped from frames and how the PN is to be verified on RX.
Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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To report channel width correctly we have
to send correct channel parameters from
mac80211 when calling cfg80211_cac_event().
This is required in case of using channel width
higher than 20MHz and we have to set correct
dfs channel state after CAC (NL80211_DFS_AVAILABLE).
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Conflicts:
net/wireless/reg.c
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CSA completion could call in a driver
bss_info_changed() with a garbled `changed` flag
leading to all sorts of problems.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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