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the define MAC_RNABLE_RX have a typo, rename it to MAC_ENABLE_RX
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Cap the maximum (total) value size and bail out if larger than KMALLOC_MAX_SIZE
as otherwise it doesn't make any sense to proceed further, since we're
guaranteed to fail to allocate elements anyway in lpm_trie_node_alloc();
likleyhood of failure is still high for large values, though, similarly
as with htab case in non-prealloc.
Next, make sure that cost vars are really u64 instead of size_t, so that we
don't overflow on 32 bit and charge only tiny map.pages against memlock while
allowing huge max_entries; cap also the max cost like we do with other map
types.
Fixes: b95a5c4db09b ("bpf: add a longest prefix match trie map implementation")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This fixes a bug and cleans up tunnelid range size
calculation code by using consistent variable names
and checks in size calculation and fill functions.
tested for a few cases of vlan-vni range mappings:
(output from patched iproute2):
$bridge vlan showtunnel
port vid tunid
vxlan0 100-105 1000-1005
200 2000
210 2100
211-213 2100-2102
214 2104
216-217 2108-2109
219 2119
Fixes: efa5356b0d97 ("bridge: per vlan dst_metadata netlink support")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We have many gro cells users, so lets move the code to avoid
duplication.
This creates a CONFIG_GRO_CELLS option.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ethtool api {get|set}_settings is deprecated.
We move this driver to new api {get|set}_link_ksettings.
As I don't have the hardware, I'd be very pleased if
someone may test this patch.
Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-next
Some patches focusing on bugfixes for v4.11:
* Fix 802.11w, which was failing to due an IGTK bug;
* A few more bugzilla bug fixes;
* A channel-switch race condition fix;
* Some fixes related to suspend/resume with new HW;
* The RF-kill saga continues;
* And some other fixes here and there...
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drivers/net/ethernet/qualcomm/emac/emac-ethtool.c:155:49-50: Unneeded semicolon
Remove unneeded semicolon.
Generated by: scripts/coccinelle/misc/semicolon.cocci
CC: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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LED Mode:
Microsemi PHY support 2 LEDs (LED[0] and LED[1]) to display different
status information that can be selected by setting LED mode.
LED Mode parameter (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get
from Device Tree.
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch doesn't affect how the code works.
My static checker complains that the mask and shift doesn't make sense
because 0xffffff << 16 goes beyond the end of 32 bits. It should be
0xffff instead but the existing code won't cause runtime bugs.
Also the casting here is not needed and not consistent with the rest of
the code.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Divide a mfuart related print so it won't exceed the allowed
MAX_MSG_LEN (110 bytes) per print.
Fixes: 19f63c531b85 ("iwlwifi: mvm: support v2 of mfuart load notification")
Signed-off-by: Golan Ben-Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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When removing an IGTK, iwl_mvm_send_sta_igtk() was
called before station ID was retrieved, so the function
was invoked with an invalid station ID. Fix this by first
getting the station ID.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=192411
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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The race happens when we send ADD_STA(auth->assoc) -> LQ_CMD
between the commands the FW sometimes loses the medium for AUX, and
sends a ndp to the AP and the flow becomes, ADD_STA -> send ndp -> LQ_CMD
the problem is that there's no rates yet defined for sending the ndp and
FW generates an assert.
The fix: change the order of the commands to LQ_CMD -> ADD_STA
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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The session protection set for association is only removed when
BSS_CHANGED_BEACON_INFO is set and BSS_CHANGED_ASSOC is not set.
However, mac80211 may set both on association (in case a beacon was
already received). In this case, mac80211 will not set
BSS_CHANGED_BEACON_INFO on the next beacons because it has already
notified the beacon change, so the session protection is never removed
(until the session protection ends).
When a CSA is received within this time, the station will fail to
folllow the channel switch because it cannot schedule the time event.
Fix this by removing the session protection when
BSS_CHANGED_BEACON_INFO and BSS_CHANGED_ASSOC are both set.
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Currently, when getting a RFKILL interrupt, the transport enters a flow
in which it stops the device, disables other interrupts, etc. After
stopping the device, the transport resets the hw, and sleeps. During
the sleep, a context switch occurs and host commands are sent by upper
layers (e.g. mvm) to the fw. This is possible since the op_mode layer
and the transport layer hold different mutexes.
Since the STATUS_RFKILL bit isn't set, the transport layer doesn't
recognize that RFKILL was toggled on, and no commands can actually be
sent, so it enqueues the command to the tx queue and sets a timer on
the queue.
After switching context back to stopping the device, STATUS_RFKILL is
set, and then the transport can't send the command to the fw.
This eventually results in a queue hang.
Fix this by setting STATUS_RFKILL immediately when
the interrupt is fired.
Signed-off-by: Golan Ben-Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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In https://bugzilla.kernel.org/show_bug.cgi?id=177341 Bob
reported a UBSAN WARNING on rs.c in iwldvm.
Fix the same bug in iwlmvm.
This because
i = index - 1;
for (mask = (1 << i); i >= 0; i--, mask >>= 1)
is unsafe: i could be negative and hence we can call <<
on a negative value.
This bug doesn't have any real impact since the condition
of the for loop will prevent any usage of mask.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=177341
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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In https://bugzilla.kernel.org/show_bug.cgi?id=177341 Bob
reported a UBSAN WARNING on rs.c.
Undefined behaviour in drivers/net/wireless/intel/iwlwifi/dvm/rs.c:746:18
This because
i = index - 1;
for (mask = (1 << i); i >= 0; i--, mask >>= 1)
is unsafe: i could be negative and hence we can call <<
on a negative value.
This bug doesn't have any real impact since the condition
of the for loop will prevent any usage of mask.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=177341
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Enabling the RTPM Kconfig option can be fairly risky.
Runtime PM must be validated against a specific platform
before it can be safely enabled. Hence, it makes no sense
for distros and other big OS vendors to enable it since
they ship code to various systems and unknown platform.
Make sure that this is hinted properly by making the
IWLWIFI_PCIE_RTPM Kconfig option depend on EXPERT.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=172411
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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David reported that the code I added uses the decrement
and increment operator on a boolean variable.
Fix that.
Fixes: 0cd58eaab148 ("iwlwifi: pcie: allow the op_mode to block the tx queues")
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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ath.git patches for 4.11. Major changes:
ath10k
* add debugfs file peer_debug_trigger for debugging firmware
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queue_entry field of skbdesc is not read any more, remove it to allow
skbdesc contain other data.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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If device fail to initialize we can OOPS in rt2x00lib_remove_dev(), due
to using uninitialized usb_anchor structure:
[ 855.435820] ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x1000 with error -19
[ 855.435826] ieee80211 phy3: rt2800_probe_rt: Error - Invalid RT chipset 0x0000, rev 0000 detected
[ 855.435829] ieee80211 phy3: rt2x00lib_probe_dev: Error - Failed to allocate device
[ 855.435845] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[ 855.435900] IP: _raw_spin_lock_irq+0xd/0x30
[ 855.435926] PGD 0
[ 855.435953] Oops: 0002 [#1] SMP
<snip>
[ 855.437011] Call Trace:
[ 855.437029] ? usb_kill_anchored_urbs+0x27/0xc0
[ 855.437061] rt2x00lib_remove_dev+0x190/0x1c0 [rt2x00lib]
[ 855.437097] rt2x00lib_probe_dev+0x246/0x7a0 [rt2x00lib]
[ 855.437149] ? ieee80211_roc_setup+0x9e/0xd0 [mac80211]
[ 855.437183] ? __kmalloc+0x1af/0x1f0
[ 855.437207] ? rt2x00usb_probe+0x13d/0xc50 [rt2x00usb]
[ 855.437240] rt2x00usb_probe+0x155/0xc50 [rt2x00usb]
[ 855.437273] rt2800usb_probe+0x15/0x20 [rt2800usb]
[ 855.437304] usb_probe_interface+0x159/0x2d0
[ 855.437333] driver_probe_device+0x2bb/0x460
Patch changes initialization sequence to fix the problem.
Cc: Vishal Thanki <vishalthanki@gmail.com>
Fixes: 8b4c0009313f ("rt2x00usb: Use usb anchor to manage URB")
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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We might kill TX or RX urb during rt2x00usb_flush_entry(), what can
cause anchor list corruption like shown below:
[ 2074.035633] WARNING: CPU: 2 PID: 14480 at lib/list_debug.c:33 __list_add+0xac/0xc0
[ 2074.035634] list_add corruption. prev->next should be next (ffff88020f362c28), but was dead000000000100. (prev=ffff8801d161bb70).
<snip>
[ 2074.035670] Call Trace:
[ 2074.035672] [<ffffffff813bde47>] dump_stack+0x63/0x8c
[ 2074.035674] [<ffffffff810a2231>] __warn+0xd1/0xf0
[ 2074.035676] [<ffffffff810a22af>] warn_slowpath_fmt+0x5f/0x80
[ 2074.035678] [<ffffffffa073855d>] ? rt2x00usb_register_write_lock+0x3d/0x60 [rt2800usb]
[ 2074.035679] [<ffffffff813dbe4c>] __list_add+0xac/0xc0
[ 2074.035681] [<ffffffff81591c6c>] usb_anchor_urb+0x4c/0xa0
[ 2074.035683] [<ffffffffa07322af>] rt2x00usb_kick_rx_entry+0xaf/0x100 [rt2x00usb]
[ 2074.035684] [<ffffffffa0732322>] rt2x00usb_clear_entry+0x22/0x30 [rt2x00usb]
To fix do not anchor TX and RX urb's, it is not needed as during
shutdown we kill those urbs in rt2x00usb_free_entries().
Cc: Vishal Thanki <vishalthanki@gmail.com>
Fixes: 8b4c0009313f ("rt2x00usb: Use usb anchor to manage URB")
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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In commit 6773386f977c ("rtlwifi: rtl8192c-common: Fix "BUG: KASAN:"),
a BUG detected when CONFIG_KASAN=y was fixed by reordering the layouts
of struct rtl_pci_priv, and struct rtl_usb_priv so that the variables
used by both PCI and USB drivers have the same offsets in both structs.
The better fix of relocating the critical variables into struct rtl_priv
was deferred as these changes do not have to be applied to stable
kernels.
This change also removes CamelCase variables with pLed0 => pled0.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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Now we always have __brcmf_err function we can do perfectly fine with
just one macro.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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This will allow extending code and using more detailed messages e.g.
with the help of dev_err.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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This allows simplifying the code by adding a simple IS_ENABLED check for
CONFIG_BRCMDB symbol.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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This is necessary so that - if ath10k is the only driver using
dev_coredump*() - the functionality is built into the kernel.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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This now declares a module parameter, so include the necessary
header file for that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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Remove redundant semicolon after switch statement.
Signed-off-by: Waldemar Rymarkiewicz <ext.waldemar.rymarkiewicz@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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When we send a deauth to a station we don't know about, we
need to use the PROBE_RESP queue. This can happen when we
send a deauth to a station that is not associated to us.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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When NSSN is behind the reorder buffer due to timeout
the reorder timer isn't getting re-armed until NSSN
catches up. Fix it.
Fixes: 0690405fef29 ("iwlwifi: mvm: add reorder timeout per frame")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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In DQA mode, first_agg_queue is initialized to
IWL_MVM_DQA_MIN_DATA_QUEUE. This causes two bugs in the tx response
flow:
1. When TX fails, we set IEEE80211_TX_STAT_AMPDU_NO_BACK regardless
if we actually have aggregation open on the queue. This causes
mac80211 to send a BAR frame even though there is no aggregation
open.
Fix that by simply checking the AMPDU flag that is set on by
mac80211 for AMPDU packets.
2. When reclaiming frames in aggregation mode, we reclaim based on
scheduler ssn and not the SN.
The reason is that scheduler ssn may be ahead of SN due to a hole
in the BA window that was filled.
However, if we have aggregations open on IWL_MVM_DQA_BSS_CLIENT_QUEUE
the reclaim flow will still go to the code of non-aggregation
instead of the aggregation code since IWL_MVM_DQA_BSS_CLIENT_QUEUE
is smaller than IWL_MVM_DQA_MIN_DATA_QUEUE, although it is a valid
aggregation queue.
Fix that by always using the aggregation reclaim code by default in
DQA mode (currently it is implicitly used by default for all queues
except the reserved BSS queue).
Fixes: cf961e16620f ("iwlwifi: mvm: support dqa-mode agg on non-shared queue")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Handling of the number of space time streams was missing for HT rate in
rate printing function. Fix it.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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When getting RF_KILL and disabling radio, the device gets stopped
and reset. This erases the IVAR table that matches the interrupt
to its cause, and is essential for MSIX proper functionality.
Till now, the table wasn't re-configured after the reset, and
therefore the interrupt that enabled radio didn't fire on the
right irq, and the driver didn't handle it correctly.
To fix this, configure the IVAR table again after resetting the
device.
Signed-off-by: Golan Ben-Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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During the suspend/resume flow some HW blocks are reset. This causes
the IVAR table to be completely erased. This table is where interrupt
causes are bound to specific IRQs. When the table is empty the
interrupt handlers are not called correctly. Fix this by reconfiguring
the IVAR table after resume.
Fixes: 2e5d4a8f61dc ("iwlwifi: pcie: Add new configuration to enable MSIX")
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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The MSIX configuration flow includes two different stages:
configuring the HW by writing to the IVAR table and configuring the SW
to reflect the HW configuration.
The HW configuration is needed on each HW reset,
whereas the SW configuration is only needed during the init flow.
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Update the drivers to pass the RSSI level as a cfg80211_cqm_rssi_notify
parameter and pass this value to userspace in a new nl80211 attribute.
This helps both userspace and also helps in the implementation of the
multiple RSSI thresholds CQM mechanism.
Note for marvell/mwifiex I pass 0 for the RSSI value because the new
RSSI value is not available to the driver at the time of the
cfg80211_cqm_rssi_notify call, but the driver queries the new value
immediately after that, so it is actually available just a moment later
if we wanted to defer caling cfg80211_cqm_rssi_notify until that moment.
Without this, the new cfg80211 code (patch 3) will call .get_station
which will send a duplicate HostCmd_CMD_RSSI_INFO command to the hardware.
Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Extend ieee80211_cqm_rssi_notify with a rssi_level parameter so that
this information can be passed to netlink clients in the next patch, if
available. Most drivers will have this value at hand. wl1251 receives
events from the firmware that only tell it whether latest measurement
is above or below threshold so we don't pass any value at this time
(parameter is 0).
Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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For wowlan netdetect a separate limit is defined for the number of
matchsets. Currently, this limit is ignored and the regular limit
for scheduled scan matchsets, ie. struct wiphy::max_match_sets, is
used for the net-detect case as well.
Cc: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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For the benefit of drivers that rebuild IEs in firmware, parse the
IEs for HT/VHT capabilities and the respective membership selector
in the (extended) supported rates. This avoids duplicating the same
code into all drivers that need this information.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Avoid assigning rdev to NULL when we already have it and getting it
again from the wiphy index, by moving this code to relevant if block.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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kmalloc() can fail. Also let's move the allocation out of the
declaration block so it's easier to read.
Fixes: 4a5eccaa9350 ("mac80211: Show pending txqlen in debugfs.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Instead of open coding the CMAC algorithm in the mac80211 driver using
byte wide xors and calls into the crypto layer for each block of data,
instantiate a cmac(aes) synchronous hash and pass all the data into it
directly. This does not only simplify the code, it also allows the use
of more efficient and more secure implementations, especially on
platforms where SIMD ciphers have a considerable setup cost.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Switch the FILS AEAD code to use a cmac(aes) shash instantiated by the
crypto API rather than reusing the open coded implementation in
aes_cmac_vector(). This makes the code more understandable, and allows
platforms to implement cmac(aes) in a more secure (*) and efficient way
than is typically possible when using the AES cipher directly.
So replace the crypto_cipher by a crypto_shash, and update the aes_s2v()
routine to call the shash interface directly.
* In particular, the generic table based AES implementation is sensitive
to known-plaintext timing attacks on the key, to which AES based MAC
algorithms are especially vulnerable, given that their plaintext is not
usually secret. Time invariant alternatives are available (e.g., based
on SIMD algorithms), but may incur a setup cost that is prohibitive when
operating on a single block at a time, which is why they don't usually
expose the cipher API.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This fixes the checkpatch.pl warnings:
* Macros should not use a trailing semicolon.
* Spaces required around that '='.
* Symbolic permissions 'S_IRUGO' are not preferred.
Signed-off-by: Dmitriy Pichugin <smokeman85@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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msix configuration functions should be called by other functions.
For example by pcie_d3_resume, move it above to enable it.
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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The conflict was an interaction between a bug fix in the
netvsc driver in 'net' and an optimization of the RX path
in 'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix smatch errors by not dereferencing iq pointer if it's NULL.
See http://marc.info/?l=kernel-janitors&m=148637299004834&w=2
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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