bnx2: Check if_running() before touching chip registers.

Add this check to bnx2_netif_stop() and bnx2_vlan_rx_register() to
prevent bus lockups on some systems when the chip is in low power state.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

bnx2: Zero out status block before chip reset.

In case IRQs are shared, we will not mistakenly start processing
the ring based on old status block indices.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-next-2.6

MAINTAINERS: add information for mwl8k wireless driver

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: update copyright and version number

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: remove mwl8k_queue_work()

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_configure_filter() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_get_stats() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_conf_tx() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_set_rts_threshold() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_bss_info_changed() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_config() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_stop() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: get rid of mwl8k_start() workqueue use

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: fix firmware command serialisation

The current mwl8k_priv->fw_lock spinlock doesn't actually protect
against multiple commands being submitted at once, as it is not kept
held over the entire firmware command submission.  And since waiting
for command completion sleeps, we can't use a spinlock anyway.

To fix mwl8k firmware command serialisation properly, we have the
following requirements:
- Some commands require that the packet transmit path is idle when
  the command is issued.  (For simplicity, we'll just quiesce the
  transmit path for every command.)
- There are certain sequences of commands that need to be issued to
  the hardware sequentially, with no other intervening commands.

This leads to an implementation of a "firmware lock" as a mutex that
can be taken recursively, and which is taken by both the low-level
command submission function (mwl8k_post_cmd) as well as any users of
that function that require issuing of an atomic sequence of commands,
and quiesces the transmit path whenever it's taken.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: mwl8k_queue_work() cleanup

Delete most of the mwl8k_work_struct fields and options, since most
of them are unused or never changed from their defaults:
- We always use priv->config_wq, so delete the wqueue argument from
  mwl8k_queue_work().
- MWL8K_WQ_SPIN and MWL8K_WQ_POST_REQUEST are never used, as all
  callers sleep for request completion, so sleep unconditionally.
- MWL8K_WQ_FREE_WORKSTRUCT is never used.
- MWL8K_WQ_TX_WAIT_EMPTY is always set, so assume it unconditionally.
- timeout_ms/txwait_attempts/tx_timeout_ms are never changed from
  their defaults, so just hardcode these in the workqueue worker.
- step is never used.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: mwl8k_txq_xmit() rework

Various mwl8k_txq_xmit changes:
- Extract the QoS field before adding the DMA header.
- Only write to tx->status once, and only after all the other
  descriptor fields have been set.
- Do all tx state manipulation under the tx spinlock.
- Remove the priv->inconfig check, as all transmit queues will
  be frozen during config cycles, so we won't ever be asked to
  transmit if a config cycle is running.
- Remove some more dead code.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: implement idle mode

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: no need to hold ->tx_lock while setting the hardware interrupt mask

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: don't hardcode the number of transmit queues

Use MWL8K_TX_QUEUES instead of a hardcoded "4" in a couple of places.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: don't touch 'command done' interrupt during firmware load

Since firmware load commands don't generate 'command done' interrupts
like normal commands do, polling for command done interrupts just
unnecessarily slows down the firmware load process.  Removing this bit
of code speeds up loading a typical firmware image from 840 msec to
180 msec.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: dma header manipulations can't fail

Adding and removing the DMA header that the mwl8k hardware requires
on tx and provides on rx can never fail, since we are guaranteed to
have enough headroom on the tx path to expand the packet, and we only
ever shrink the packet on the rx path.  (And on both paths we are
guaranteed to be the only user of the skb we are handling.)

This allows removing all of the skb clone handling in the tx and tx
reclaim paths, and eliminates error checks in both the tx and rx
paths, simplifying the code a bit more.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: ->add_interface() is not called for monitor interfaces

There is no need to check for NL80211_IFTYPE_MONITOR in
->add_interface(), as this function is never called for monitor
interfaces.  Also, there is no need to advertise this bit in our
wiphy's ->interface_modes.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: fix mwl8k_configure_filter() parameter lifetime issue

mwl8k_configure_filter() passes pointers to total_flags and the
multicast address list to a workqueue function, while there is no
guarantee that those pointers will still be valid by the time the
workqueue function runs.

Solve this by passing total_flags by value, and by passing an
already built multicast address setup command packet to the workqueue
function so that we don't have to look at the multicast address list
itself outside of mwl8k_configure_filter().

Also, since ->configure_filter() can sleep now, wait synchronously
for the worker to finish.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: remove MWL8K_*_SLOTTIME defines

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: remove MWL8K_WMM_* defines

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: remove MWL8K_RADIO_*_PREAMBLE defines

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: remove MWL8K_RADIO_* defines

Instead of passing a flag bitmask to mwl8k_cmd_802_11_radio_control,
pass the 'enable' and 'force' arguments as separate parameters, and
introduce wrappers for the common cases of enabling and disabling
without forcing.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: various coding style cleanups

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: sort firmware command list by opcode, and trim unused commands

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: s/IEEE80211_ADDR_LEN/ETH_ALEN/g

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mwl8k: remove various unused struct members and defines

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Nuke struct ath9k_node_stats

Other than ns_avgbrssi (Average beacon rssi) no data of
ath9k_node_stats is being used anywhere. Nuke this structure
and move its only useful member to ar5416Anistate. Also cleanup
this redundant data in ath_softc.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Fix bug in retrieving average beacon rssi

Currently the beacon rssi that LPF gives is divided and rounded
up by ATH_RSSI_EP_MULTIPLIER twice. This will leave the incorrect rssi
in ANI. Having correct rssi in ANI fixes the connection stability at
< 30dB rssi range. This patch removes the unncessary computation of average
rssi over already valid average rssi. Also removes the redundant macros to
find average rssi.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: add hardware tkip

This add hardware tkip for b43.

Signed-off-by: Gregor Kowski <gregor.kowski@gmail.com>
Acked-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mac80211: fix register_hw error path

"cfg80211: fix alignment problem in scan request"
introduced a bug into the error path, because now
we allocate the entire scan request and not just
the channel list (the channel list is allocated
together with the scan request) -- on errors we
thus also need to free the entire scan request.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Implement spec updates and remove resolved FIXMEs

Larry has started re-checking all current routines against a new
version of the Broadcom MIPS driver. This patch implements the first
round of changes he documented on the specs wiki.

Also remove a few FIXMEs regarding missing initial values for variables
with dynamic initial values where reading the values has been implemented.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

cfg80211: allow cfg80211_connect_result with bssid == NULL

In case of connection failure, the bssid info is not a must have.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

orinoco: remove spare whitespace

Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

cfg80211: fix leaks of wdev->conn->ie

This only occurs in the following error situations:
 - driver calls connect_result with failure
 - error scheduling authentication on connect
 - error initiating scan (to get BSSID and channel) on
   connect
 - userspace calls disconnect while in the SCANNING or
   SCAN_AGAIN states

Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ar9170: refactor configure_filter

Thanks to "mac80211: allow configure_filter callback to sleep",
we no longer have to defer the work to the workqueue.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Two small spec updates

The specs are beginning to support rev3 LP-PHYs - implement one of
the changes needed for rev3 support.
Also, in the new MIPS driver, the "Japan TX filter" was renamed to
"analog TX filter init" - however, calling it "init" is confusing,
so name it "set analog filter", with a comment for easier future
identification.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: bss_info_changed() callback is allowed to sleep

The bss_info_changed() callback function no longer needs
to be atomic. Remove the scheduled work structure and
call into the driver directly.

Additionaly this makes the DRIVER_REQUIRE_SCHEDULED
flag redundant so it can be removed.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: configure_filter() callback is allowed to sleep

The configure_filter() callback function no longer needs
to be atomic. Remove the scheduled work structure and
call into the driver configure_filter() directly.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

cfg80211: fix dangling scan request checking

My patch "cfg80211: fix deadlock" broke the code it
was supposed to fix, the scan request checking. But
it's not trivial to put it back the way it was, since
the original patch had a deadlock.

Now do it in a completely new way: queue the check
off to a work struct, where we can freely lock. But
that has some more complications, like needing to
wait for it to be done before the wiphy/rdev can be
destroyed, so some code is required to handle that.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ipw2x00: fix sparse warnings

This fixes:

  CHECK   drivers/net/wireless/ipw2x00/ipw2100.c
drivers/net/wireless/ipw2x00/ipw2100.c:7888:22: warning: symbol 'mode' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2100.c:188:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2100.c:7952:18: warning: symbol 'mode' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2100.c:188:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2100.c:8000:18: warning: symbol 'mode' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2100.c:188:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2100.c:8268:27: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2100.c:8268:27: originally declared here
drivers/net/wireless/ipw2x00/ipw2100.c:8268:27: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2100.c:8268:27: originally declared here
drivers/net/wireless/ipw2x00/ipw2100.c:8268:27: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2100.c:8268:27: originally declared here
  CC [M]  drivers/net/wireless/ipw2x00/ipw2100.o
  CHECK   drivers/net/wireless/ipw2x00/ipw2200.c
drivers/net/wireless/ipw2x00/ipw2200.c:847:13: warning: symbol 'led' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:92:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:891:13: warning: symbol 'led' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:92:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:935:13: warning: symbol 'led' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:92:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:980:13: warning: symbol 'led' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:92:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:1016:13: warning: symbol 'led' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:92:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:1051:13: warning: symbol 'led' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:92:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:1823:13: warning: symbol 'channel' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:86:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min1' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: warning: symbol '_min2' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:4268:19: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:6228:28: warning: symbol 'channel' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:86:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:6369:20: warning: symbol 'channel' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:86:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:6857:12: warning: symbol 'mode' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:87:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:7964:13: warning: symbol 'channel' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:86:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:8720:12: warning: symbol 'channel' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:86:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:9662:13: warning: symbol 'mode' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:87:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:9720:13: warning: symbol 'mode' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:87:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:9826:13: warning: symbol 'mode' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:87:12: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:10318:21: warning: symbol 'remaining_bytes' shadows an earlier one
drivers/net/wireless/ipw2x00/ipw2200.c:10184:13: originally declared here
drivers/net/wireless/ipw2x00/ipw2200.c:8338:45: warning: cast to restricted __le16
drivers/net/wireless/ipw2x00/ipw2200.c:4414:21: warning: incorrect type in assignment (different base types)
drivers/net/wireless/ipw2x00/ipw2200.c:4414:21:    expected restricted __le16 [usertype] size
drivers/net/wireless/ipw2x00/ipw2200.c:4414:21:    got unsigned short [unsigned] [usertype] <noident>
drivers/net/wireless/ipw2x00/ipw2200.c:6105:33: warning: incorrect type in initializer (different base types)
drivers/net/wireless/ipw2x00/ipw2200.c:6105:33:    expected restricted __le16 [usertype] tx_rates
drivers/net/wireless/ipw2x00/ipw2200.c:6105:33:    got unsigned short [unsigned] [usertype] rates_mask
drivers/net/wireless/ipw2x00/ipw2200.c:6124:29: warning: bad assignment (>>=) to restricted __le16
drivers/net/wireless/ipw2x00/ipw2200.c:6130:31: warning: restricted __le16 degrades to integer
drivers/net/wireless/ipw2x00/ipw2200.c:6140:23: warning: restricted __le16 degrades to integer
drivers/net/wireless/ipw2x00/ipw2200.c:6149:54: warning: restricted __le16 degrades to integer
drivers/net/wireless/ipw2x00/ipw2200.c:6151:37: warning: invalid assignment: &=
drivers/net/wireless/ipw2x00/ipw2200.c:6151:37:    left side has type restricted __le16
drivers/net/wireless/ipw2x00/ipw2200.c:6151:37:    right side has type int
drivers/net/wireless/ipw2x00/ipw2200.c:6154:54: warning: restricted __le16 degrades to integer
drivers/net/wireless/ipw2x00/ipw2200.c:6156:37: warning: invalid assignment: &=
drivers/net/wireless/ipw2x00/ipw2200.c:6156:37:    left side has type restricted __le16
drivers/net/wireless/ipw2x00/ipw2200.c:6156:37:    right side has type int
drivers/net/wireless/ipw2x00/ipw2200.c:6159:55: warning: restricted __le16 degrades to integer
drivers/net/wireless/ipw2x00/ipw2200.c:6161:37: warning: invalid assignment: &=
drivers/net/wireless/ipw2x00/ipw2200.c:6161:37:    left side has type restricted __le16
drivers/net/wireless/ipw2x00/ipw2200.c:6161:37:    right side has type int
drivers/net/wireless/ipw2x00/ipw2200.c:6164:29: warning: invalid assignment: |=
drivers/net/wireless/ipw2x00/ipw2200.c:6164:29:    left side has type restricted __le16
drivers/net/wireless/ipw2x00/ipw2200.c:6164:29:    right side has type unsigned short
drivers/net/wireless/ipw2x00/ipw2200.c:7853:29: warning: incorrect type in assignment (different base types)
drivers/net/wireless/ipw2x00/ipw2200.c:7853:29:    expected signed char [signed] [usertype] [explicitly-signed] rt_dbmnoise
drivers/net/wireless/ipw2x00/ipw2200.c:7853:29:    got restricted __le16 [usertype] noise
drivers/net/wireless/ipw2x00/ipw2200.c:7967:25: warning: incorrect type in initializer (different base types)
drivers/net/wireless/ipw2x00/ipw2200.c:7967:25:    expected signed char [signed] [usertype] [explicitly-signed] noise
drivers/net/wireless/ipw2x00/ipw2200.c:7967:25:    got restricted __le16 [usertype] noise

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: Zhu Yi <yi.zhu@intel.com>
Acked-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mac80211: New stat counters for multicast and unicast forwarded frames

This expands on the current fwded_frames stat counter which should be equal to
the total of these two new counters.  The new counters are called "fwded_mcast"
and "fwded_unicast".

Signed-off-by: Daniel Walker <dwalker@fifo99.com>
Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

wl1271: remove print_mac usage

CC [M]  drivers/net/wireless/wl12xx/wl1271_main.o
drivers/net/wireless/wl12xx/wl1271_main.c: In function ‘wl1271_op_add_interface’:
drivers/net/wireless/wl12xx/wl1271_main.c:611: warning: ‘print_mac’ is deprecated (declared at include/linux/if_ether.h:142)

Signed-off-by: John W. Linville <linville@tuxdriver.com>

rc80211_pid_algo.c: remove unused variable declaration

CC [M]  net/mac80211/rc80211_pid_algo.o
net/mac80211/rc80211_pid_algo.c: In function ‘rate_control_pid_rate_init’:
net/mac80211/rc80211_pid_algo.c:304: warning: unused variable ‘si’

Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath: move regulatory info into shared common structure

This moves the shared regulatory structure into the
common structure. We will use this ongoing for common
data.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Fix TX poll cancelling

In ath9k_stop(), tx_complete_work was being cancelled twice.
This patch fixes it. Also, locking sc->mutex should be done
at the beginning.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

wl1251: halt the embedded CPU before loading firmware

After initial power-up, the embedded cpu is usually halted.  However,
if we down the interface and only do a soft reset before bringing
the interface back up, it will still be running and the firmware
loading code will bail out.  This change halts the CPU before loading
the firmware, enabling a second call to wl1251_boot() to succeed
without a hard reset.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mac80211: Decouple fail_avg stats used by mesh from rate control algorithm.

Mesh uses the tx failure average to compute the (m)path metric.  This used to
be done inside the rate control module.  This patch breaks the dependency
between the mesh stack and the rate control algorithm.  Mesh will now work
independently of the chosen rate control algorithm.

The mesh stack keeps a moving average of the average transmission losses for
each mesh peer station.  If the fail average exceeds a certain threshold, the
peer link is marked as broken.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: Add support for retry rates

rt2800pci can handle different retry rates,
it will always step 1 rate down after a failed
transmission so creating the retry rate list
for mac80211 is quite simple.

Signed-off-by: Benoit PAPILLAULT <benoit.papillault@free.fr>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: Fix MCS register intialization

According to the original Ralink driver,
LG_FBK_CFG0_OFDMMCS2FBK should be initialized to 9 rather then 3.

Based on a patch for rt2800pci from Benoit

Signed-off-by: Benoit PAPILLAULT <benoit.papillault@free.fr>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: wireless CLI ID and packet ID must not be 0

In the TX descriptor the Packet ID must not be 0,
so add 1 to the ID. The wireless CLI ID is not allowed
to be 0 either, but also must be initialized with the
wcid value rather then keyid.

Based on a patch for rt2800pci from Benoit

Signed-off-by: Benoit PAPILLAULT <benoit.papillault@free.fr>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: Set SKBDESC_L2_PADDED in RX path

When the RX descriptor indicates the frame was L2 padded,
the SKBDESC_L2_PADDED flag should be set to make sure the
L2 padding is removed before it is send to mac80211.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: Add new RF chip defines

Add new defines for RF chipsets which can be found
by the driver. We don't have to check for these
chips specifically yet, but it is better to have
the defines in now.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: Fix for rt2800usb for SHARED_KEY_TABLE initializations

Fixed comments about SHARED_KEY_TABLE_BASE and SHARED_KEY_MODE_BASE.
Fixed initialization loop for SHARED_KEY_MODE_ENTRY.

Based on a patch for rt2800pci from Benoit.

Signed-off-by: Benoit PAPILLAULT <benoit.papillault@free.fr>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rt2x00: Fix RFKILL polling

The rfkill_poll callback function in the drivers check a bit
to see if the RFKILL key has been pressed. However when the
bit is set it means the radio is active and the device can be
used.

The wiphy_rfkill_set_hw_state() function expects the inversed,
so '1' must be send when the radio must be disabled.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Fix setting TX power control mode during RC calibration

Call set_tx_power_control with a LPPHY_TXPCTL rather than an
LPPHY_TX_PWR_CTL_CMD_MODE.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Fix reading old mode in the set TX power control routine

Check the mode the hardware is in, not the mode we used the last time.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

wl1251: correct definitions for 0th bit defines

ACX_SLV_SOFT_RESET_BIT and ACX_REG_EEPROM_START_BIT are both defined
as "1" in the vendor driver code, but they were defined to be BIT(1)
("2") here.

The SOFT_RESET typo ensures that wl1251_boot_soft_reset() doesn't;
as a result the device hangs when trying to reprogram the PLL
registers while running.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Acked-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mac80211: remove deprecated API

All but two drivers have now stopped using the two
deprecated members radio_enabled and beacon_int,
so it's about time to remove them for good.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mac80211: allow configure_filter callback to sleep

Over time, a whole bunch of drivers have come up
with their own scheme to delay the configure_filter
operation to a workqueue. To be able to simplify
things, allow configure_filter to sleep, and add
a new prepare_multicast callback that drivers that
need the multicast address list implement. This new
callback must be atomic, but most drivers either
don't care or just calculate a hash which can be
done atomically and then uploaded to the hardware
non-atomically.

A cursory look suggests that at76c50x-usb, ar9170,
mwl8k (which is actually very broken now), rt2x00,
wl1251, wl1271 and zd1211 should make use of this
new capability.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

cfg80211: report userspace SME connected event properly

Instead of hacking the event reporting into the
__cfg80211_connect_result() function which is also
invoked by others, set up things correctly and then
invoke that function, so that it can do more sanity
checking.

Also, it is currently not possible to get a ROAMED
event from the userspace SME anyway since we send
out a DISCONNECTED event when it disassociates and
then a new CONNECTED event on the next association.

Thanks to Zhu Yi for pointing out that the code is
somewhat convoluted and doesn't warn when it should.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Remove BROKEN from B43_PHY_LP

Larry has reported success getting scan data with an LP-PHY device,
so it's probably time to release LP-PHY support for testing.

Also disable 802.11a support for now, as 802.11a currently causes
the driver to panic on startup (NULL pointer dereference).

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Update B2062 radio init with recent spec changes

The spec for initializing the B2062 radio have changed recently,
update the code to match the changes.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Fix a bug in the B2062 channel tune path

I missed the "+16" part of the instruction in the specs.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Update code for spec fixes, and fix a few typos

A few typos have been discovered in both the specs and the code.
This patch fixes them.

Also use lpphy_op_switch_channel consistently, and make all users
of it print its return value for easier debugging.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Fix a spec error in the B2062 channel switch routine

The channel switch routine had a whole instruction missing. Add it.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

cfg80211: fix deadlock

When removing an interface with nl80211, cfg80211 will
deadlock in the netdev notifier because we're already
holding rdev->mtx and try to acquire it again to verify
the scan has been done.

This bug was introduced by my patch
"cfg80211: check for and abort dangling scan requests".

To fix this, move the dangling scan request check into
wiphy_unregister(). This will not be able to catch all
cases right away, but if the scan problem happens with
a manual ifdown or so it will be possible to remedy it
by removing the module/device.

Additionally, add comments about the deadlock scenario.

Reported-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Christian Lamparter <chunkeey@web.de>
Tested-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Update baseband init for recent spec changes

The spec had some nasty typos, and a large part of the rev0/1 BB
init procedure was also missing. Fix these.

Also make the init-time channel switch debuggable.

(The change from -EINVAL to -EIO is simply to make it possible
to distinguish the PLL charge pump error from a channel-not-found
error.)

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: Handle B43_PHYTYPE_LP in RX path

Don't drop all packets received from an LP-PHY with WARN_ON.
Also update a comment with LP-specific information.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Fix another TX power control abuse

This should fix the remaining WARN_ON.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Update TX gain override for a spec typo fix

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Don't adjust gain table for rev2+ when setting channel

Rev2+ never needs to have gain tables adjusted according to the spec.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: Make LP-PHY testable

-Enable rate memory init for LP-PHY (same as G and N-PHY).
-Mark rev.2 LP-PHYs with the B2063 radio as supported.
-Allow using the 5GHz band on LP-PHYs.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: Add LP-PHY firmware loading support

Add support for loading LP-PHY firmware to b43_try_request_fw.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ssb: Fix typo in the rev8 SPROM extraction routine

No comment. :-)

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

p54: disable PS by default

Johannes kindly pointed out that I completely missed a hunk in
his patch: "[PATCH] cfg80211: allow driver to override PS default".

The driver must explicitly set ps_default to false,
as the setting is pre-filled with the kconfig default.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Updates for AR9287_12 version of chipset.

Enable AsyncFIFO and AGGWEP for AR9287_12 and later revisions only.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Fix ref power interpolation logic for AR9287 chipsets.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Enable LEDs for AR9287 chipsets.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Set AR_WA for AR9287 as it improves consistency in throughput.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Add open loop power control support for AR9287.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Implement channel switching for rev0/1/B2062 radio

-Move pdiv from lpphy_2062_init to struct b43_phy_lp.
-Add channel table for the B2062 radio.
-Add code for tuning the B2062 radio to channel.
-Add error handling to op_switch_channel, and use it for both radios.

Rev0/1/B2062 will now hopefully show some signs of life, though
it won't work at full performance, as calibration is still missing.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

b43: LP-PHY: Implement channel switching for rev2+/B2063 radio

Rev.2+/B2063 will now hopefully show some signs of life, though
it won't work at full performance, as calibration is still missing.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

libertas: don't use dynamic-sized array

sparse complains about a bad constant expression due to the use of a
dynamic-sized array in get_common_rates().  Allocate and free the array
instead.

Signed-off-by: Andrey Yurovsky <andrey@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: disable PS by default

Unfortunately, PS currently affects RX performance
significantly enough to warrant disabling it by
default, but give the user the choice to enable it
again with iwconfig.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: fix erroneous use of iwl_rx_packet.len as a length

The field called 'len' in struct iwl_rx_packet is in fact not just a length
field but also includes some flags from the flow handler.  In several places
throughout the driver, this causes incorrect values to be interpreted as
lengths when the field is improperly masked.

In most situations the improper use is for debugging output, and simply results
in an erroneous message, such as:

[551933.070224] ieee80211 phy0: I iwl_rx_statistics Statistics notification received (480 vs -1367342620).

which should read '(480 vs 484)'.

In at least one case this could case bad things to happen:

void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
                                      struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
                        "notification for %s:\n",
                        le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
        iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len)
);
}
EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);

Given the rampant misuse of this field without proper masking throughout the
driver (every use but one), this patch renames the field from 'len' to
'len_n_flags' to reduce confusion.  It also adds the proper masking when
this field is used as a length value.

Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: add thermal throttling support to 5150

Adding legacy thermal throttling management support to 5150 NIC

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: use station HT capabilities and BSS operating mode for Green-field

Green-field mode should be configured in the HT station table.  This patch uses
both the per-station GF support flag as well as the current BSS HT operation
mode (non-GF stations present flag).

Added the "ht_greenfield_support" field to struct iwl_cfg to replace the
device-specific check in rs_use_green().  That check has been moved to
iwlcore_init_ht_hw_capab().

Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: check short GI support per-station rather than globally

Short guard interval support is a local per-station parameter not a global
per-NIC parameter.  (mac80211 will correctly remove SGI support from station
capabilities if the BSS does not permit it).  This patch removes the short GI
support bitfield from the global iwl_ht_info struct and properly uses
per-station HT capabilities during rate selection.

Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: configure HT40 channels in iwl_mac_config

As indicated by note in iwl_ht_conf, some HT parameters are set on association
(e.g., channel width) and some vary over time (HT protection mode) and per
station (e.g., short GI support).  The global parameters should be set in
iwl_mac_config and the local/varying parameters in iwl_ht_conf.

This patch moves the channel width configuration from iwl_ht_conf to
iwl_mac_config, and defers further cleanup of the local/global conflation for a
later patch.

This fixes a bug in using HT40 channels in some modes.

Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: refactor packet reception code

This patch fixes a number of issues in iwl_rx_reply_rx and
iwl_pass_packet_to_mac80211.  These issues stem from the complexities of
managing two different types of packet commands for different hardware.

- Unify code handling rx_phy_res in SKB or cached to eliminate redundancy and
remove potential NULL pointer accesses
- Replace magic number with proper constant
- Optimize functions by moving early exit conditions before computation
- Comment code and improve some variable names
- Remove redundant computation in iwl_pass_packet_to_mac80211 by passing in the
correct, already-computed arguments.

Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: remove unused members of iwl_ht_info

Some members of iwl_ht_info are unused, and one of
them is write-only, so we can remove these three:
max_amsdu_size, ampdu_factor and mpdu_density.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: traverse linklist to find the valid OTP block

For devices using OTP memory, EEPROM image can start from
any one of the OTP blocks. If shadow RAM is disabled, we need to
traverse link list to find the last valid block, then start the EEPROM
image reading.

If OTP is not full, the valid block is the block _before_ the last block
on the link list; the last block on the link list is the empty block
ready for next OTP refresh/update.

If OTP is full, then the last block is the valid block to be used for
configure the device.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: cleanup HT40 extension channels setup

The patch cleans up the HT40 extension channels setup for EEPROM
band 6 and 7 to make it more readable.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

iwlwifi: include HT configuration when adding stations through rs_rate_init

Driver's first notification of a new station from mac80211 can be through rate
selection API.  This patch fixes a bug where, in this code path, the HT
capabilities of the new station were ignored.

Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>