i2400m_tx_skip_tail() needs to handle the special case of being called
when the tail room that is left over in the FIFO is zero.

This happens when a TX message header was opened at the very end of
the FIFO (without payloads). The i2400m_tx_close() code already marked
said TX message (header) to be skipped and this function should be
doing nothing.

It is called anyway because it is part of a common "corner case" path
handling which takes care of more cases than only this one.

The tail room computation was also improved to take care of the case
when tx_in is at the end of the buffer boundary; tail_room has to be
modded (%) to the buffer size. To do that in a single well-documented
place, __i2400m_tx_tail_room() is introduced and used.

Treat i2400m->tx_in == 0 as a corner case and handle it accordingly.

Found and diagnosed by Cindy H. Kao.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

In some situations, when a new TX message header is started, there
might be no space for data payloads. In this case the message is left
with zero payloads and the i2400m_tx_close() function has just to mark
it as "to skip". If it tries to go ahead it will overwrite things
because there is no space to add padding as defined by the
bus-specific layer. This can cause buffer overruns and in some stress
cases, panics.

Found and diagnosed by Cindy H. Kao.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

The constant is being use as an alignment factor, not as a padding
factor; made reading/reviewing the code quite confusing.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

This reset type causes the WiMAX function to be disabled and
re-enabled, which will force the WiMAX device to reset and enter boot
mode.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>

Changing debug level of print out to support validation engineers
getting the messages they need.
Signed-off-by:   <dirk.j.brandewie@intel.com>

By mistake, the BUG_ON() check was left in there and it will fail when
called if i2400m->work_queue is still not setup.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

RX support is the only user of the work-queue, to process
reports/notifications from the device. Thus, it needs the work queue
to be initialized first.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

Reported and fixed by Cindy H Kao.

When the device is stopped __i2400m_dev_stop() stops the network
queue.

However, when this is done in the middle of heavy network operation,
when the bus-specific subdriver is still wrapping up and it reports a
sent TX transaction with _tx_msg_sent() right after the device was
stopped, the queue was being started again, which was causing a stream
of oopsen and finally a panic.

In any case, said call has no place there. It's a left over from an
early implementation that was discarded later on.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

The i2400m driver waits for the device to report being ready for
entering power save before asking it to do so. This module parameter
allows control of said operation; if disabled, the driver won't ask
the device to enter power save mode.

This is useful in setups where power saving is not so important or
when the overhead imposed by network reentry after power save is not
acceptable; by combining this with parameter 'idle_mode_disabled', the
driver will always maintain both the connection and the device in
active state.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

The WAKE_MCAST bit is tested twice, the first should be WAKE_UCAST.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Jie Yang <jie.yang@atheros.com>
Cc: Jay Cliburn <jcliburn@gmail.com>
Cc: Chris Snook <csnook@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a configurable Descriptor Skip Length for systems that lack cache
coherence.

(akpm: I think this should be done as a module parameter, not a
compile-tinme option)
Signed-off-by: Risto Suominen <Risto.Suominen@gmail.com>
Cc: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13348

akpm: the reporter disappeared, so I typed it in again.

It is not possible to make clone of tagged VLAN interface to be used as
mac-based vlan interfave.

How reproducible:
Use any 802.1q tagged vlan interface, e.g. eth2.700 and clone it:

  ip link add link eth2.700 address 00:04:75:cb:38:09 macvlan0 type macvlan
  ip link set dev macvlan0 up
  ip addr add 10.195.1.1/24 dev macvlan0

So far, so good. Now try to ping anything via macvlan0:

  ping 10.195.1.2

Actual results:
For every attempted packet tx kernel writes to console:

------------[ cut here ]------------
WARNING: at net/8021q/vlan_dev.c:254 vlan_dev_hard_header+0x36/0x126 [8021q]()
Hardware name: M22ES
Modules linked in: arptable_filter arp_tables bridge veth macvlan arc4 ecb
ppp_mppe ppp_async crc_ccitt ppp_generic slhc autofs4 sunrpc 8021q garp stp
ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_tcpudp
x_tables dm_mirror dm_region_hash dm_log dm_multipath dm_mod sbs sbshc lp
floppy snd_intel8x0 joydev snd_seq_dummy snd_intel8x0m snd_ac97_codec
ide_cd_mod ac97_bus snd_seq_oss cdrom snd_seq_midi_event serio_raw snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss parport_pc snd_pcm parport battery
8139cp snd_timer i2c_sis96x ac button snd rtc_cmos rtc_core 8139too soundcore
rtc_lib mii i2c_core pcspkr snd_page_alloc pata_sis libata sd_mod scsi_mod ext3
jbd ehci_hcd ohci_hcd uhci_hcd [last unloaded: ip_tables]
Pid: 0, comm: swapper Tainted: G        W  2.6.29.3 #1
Call Trace:
 [<c0425f48>] warn_slowpath+0x60/0x9f
 [<c0425f6f>] warn_slowpath+0x87/0x9f
 [<dffb850d>] vlan_dev_hard_header+0x0/0x126 [8021q]
 [<dffb8543>] vlan_dev_hard_header+0x36/0x126 [8021q]
 [<dffb850d>] vlan_dev_hard_header+0x0/0x126 [8021q]
 [<df83155d>] macvlan_hard_header+0x3c/0x47 [macvlan]
 [<df831521>] macvlan_hard_header+0x0/0x47 [macvlan]
 [<c062bf3f>] arp_create+0xef/0x1ff
 [<c062c08c>] arp_send+0x3d/0x54
 [<c062c916>] arp_solicit+0x16c/0x177
 [<c05fadd2>] neigh_timer_handler+0x227/0x269
 [<c05fabab>] neigh_timer_handler+0x0/0x269
 [<c042ce4d>] run_timer_softirq+0xf0/0x141
 [<c0429e5a>] __do_softirq+0x76/0xf8
 [<c0429de4>] __do_softirq+0x0/0xf8
 <IRQ>  [<c044fb67>] handle_level_irq+0x0/0xad
 [<c0429db7>] irq_exit+0x35/0x62
 [<c04046bb>] do_IRQ+0xdf/0xf4
 [<c04035a7>] common_interrupt+0x27/0x2c
 [<c04079c5>] default_idle+0x2a/0x3d
 [<c0401bb6>] cpu_idle+0x57/0x70

Macvlan driver always uses standard ethernet header length for all types
of interface to which it is linked.  This patch fixes this problem.

Reported-by: <sg.tweak@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Restore support for cards with MII-lacking PHYs as compared to removed
pre-2.6.29 eepro100 driver: use full low-level MII I/O access abstraction
by providing clean PHY-specific mdio_ctrl() functions for either standard
MII-compliant cards, slightly special ones or non-MII PHY ones.

We now have another netdev_priv member for mdio_ctrl(), thus we have some
array indirection, but we save some additional opcodes for specific
phy_82552_v handling in the common case.

[akpm@linux-foundation.org: cleanups]
Signed-off-by: Andreas Mohr <andi@lisas.de>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Bruce Allan <bruce.w.allan@intel.com>
Cc: PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>
Cc: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: David S. Miller <davem@davemloft.net>

rfkill currently requires a global lock within the
rfkill_register() function, and holds that lock over
calls to the set_block() methods. This means that we
cannot hold a lock around rfkill_register() that we
also require in set_block(), directly or indirectly.
Fix cfg80211 to register rfkill outside the block
locked by its global lock. Much of what cfg80211 does
in the locked block doesn't need to be locked anyway.
Reported-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

When associated, but probing the AP because we detected
beacon loss, we need to disable powersave to be able to
receive the probe response. Change the code to do that by
checking whether we're trying to probe when determining
the possibility of going into PS, and recalculate the PS
ability at the necessary spots.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

We don't want to trigger moving between PS mode during scan,
because then we will sometimes end up sending nullfunc frames
during scan. We're supposed to only send one prior to scan
and after scan.

This fixes an oops which occured due to an assert in ath9k:

http://marc.info/?l=linux-wireless&m=124277331319024

The assert was happening because the rate control algorithm
figures it should find at least one valid dual stream or
single stream rate. Since we allow mac80211 to send nullfunc
frames during scan and dynamic PS was enabled at times we ended
up trying to send nullfunc frames for the target sta on the
wrong band for which we have no valid rate to communicate with
it. This breaks the assumptions in rate control.

We determine we also need to disable moving between PS modes
when not associated so lets just add that now as well, and we
should not have a ps_sdata when that interface cannot actually
go into PS because it's not associated.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Always enable rfkill since the ifdefs in the code is not really worth
the Kconfig option.  Also fix a few code style things, and remove the
usage of the ah_gpio[] array so we can remove it later.
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

The return type has more than two values, but it can validly
only ever return TX_DROP and TX_CONTINUE, so use a bool
instead of ieee80211_tx_result.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Always use the wiphy name instead.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

This patch along with my previous patch in mac80211 "Fix the
way ADDBA count..", fixes hang in tx when connected to an HT
AP which rejects/times out on addba req.

AGGR_ADDBA_PROGRESS should be cleared in aggr state when addba
negotiation is terminated due to either addba response is timed out
or addba is denied by the AP. With out clearing this bit,
all frames are queued onto s/w queue for getting tx'd as aggr and
will never be scheduled onto hw queue.
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

addba_req_num[tid] is supposed to have the count of consecutive
addba request attempts on 'tid' which failed. This count is checked
against a retry threshold (3 times) before starting the addba negotiation.
This patch fixes the way this addba count is incremented/reset and thereby
avoids indefinite addba attempts.
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

As Pavel puts userspace can be stupid and should not
cause kernel crashes. In this case Pavel was able to
find a crash here but unable to reproduce. Either way
lets deal with this.

This should fix:

------------[ cut here ]------------
kernel BUG at /home/proski/src/linux-2.6/net/wireless/reg.c:2132!
Oops: Exception in kernel mode, sig: 5 [#1]
PowerMac
Modules linked in: ath5k ath [last unloaded: scsi_wait_scan]
NIP: c02f3eac LR: c02f3d08 CTR: 00000000
REGS: ef107aa0 TRAP: 0700   Not tainted  (2.6.30-rc8-wl)
MSR: 00029032 <EE,ME,CE,IR,DR>  CR: 88002442  XER: 20000000
TASK = ef84acb0[834] 'crda' THREAD: ef106000
GPR00: ef953840 ef107b50 ef84acb0 ef1380bc 00000006 c035a5c8 ef107b90 c035a5c8
GPR08: 00080005 efb68980 c0445628 ef130004 28002422 10019ce0 10012d3c 00000001
GPR16: 1070b2ac 00000005 48023558 1070b380 4802304c 00000000 ef107ddc c035a5c8
GPR24: ef107b78 c0443350 ef8bcb00 00000005 ef138080 c04a6a70 c04a0000 ef8bcb00
NIP [c02f3eac] set_regdom+0x4c4/0x4ec
LR [c02f3d08] set_regdom+0x320/0x4ec
Call Trace:
[ef107b50] [c02f3d08] set_regdom+0x320/0x4ec (unreliable)
[ef107b70] [c02f9d10] nl80211_set_reg+0x140/0x2d0
[ef107bc0] [c02aa2b8] genl_rcv_msg+0x204/0x228
[ef107c10] [c02a97cc] netlink_rcv_skb+0xe8/0x10c
[ef107c30] [c02aa094] genl_rcv+0x3c/0x5c
[ef107c40] [c02a9050] netlink_unicast+0x308/0x36c
[ef107c80] [c02a92bc] netlink_sendmsg+0x208/0x2f0
[ef107cd0] [c0282048] sock_sendmsg+0xac/0xe4
[ef107db0] [c02822b4] sys_sendmsg+0x234/0x2d8
[ef107f00] [c0283a88] sys_socketcall+0x108/0x258
[ef107f40] [c0012790] ret_from_syscall+0x0/0x38
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Add automagic feature flags, so the firmware can tell the driver
about supported features and the driver can switch features on/off as
needed.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Once rfkill-input is disabled, the "global" states will only be used as
default initial states.

Since the states will always be the same after resume, we shouldn't
generate events on resume.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

The re-written rfkill core ensures rfkill devices are initialized to
the system default state.  The core calls set_block after registration
so the driver shouldn't need to.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

rfkill_set_global_sw_state() (previously rfkill_set_default()) will no
longer be exported by the rewritten rfkill core.

Instead, platform drivers which can provide persistent soft-rfkill state
across power-down/reboot should indicate their initial state by calling
rfkill_set_sw_state() before registration.  Otherwise, they will be
initialized to a default value during registration by a set_block call.

We remove existing calls to rfkill_set_sw_state() which happen before
registration, since these had no effect in the old model.  If these
drivers do have persistent state, the calls can be put back (subject
to testing :-).  This affects hp-wmi and acer-wmi.

Drivers with persistent state will affect the global state only if
rfkill-input is enabled.  This is required, otherwise booting with
wireless soft-blocked and pressing the wireless-toggle key once would
have no apparent effect.  This special case will be removed in future
along with rfkill-input, in favour of a more flexible userspace daemon
(see Documentation/feature-removal-schedule.txt).

Now rfkill_global_states[n].def is only used to preserve global states
over EPO, it is renamed to ".sav".
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

In order to handle powersave frames properly we had needed
to pass these out to the device queues again, and introduce
the skb->requeue bit. This, however, also has unnecessary
overhead by needing to 'clean up' already tried frames, and
this clean-up code is also buggy when software encryption
is used.

Instead of sending the frames via the master netdev queue
again, simply put them into the pending queue. This also
fixes a problem where frames for that particular station
could be reordered when some were still on the software
queues and older ones are re-injected into the software
queue after them.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

During the rfkill conversion I added code to call
sony_nc_rfkill_set with the wrong argument, causing
a segfault Reinette reported. The compiler could not
catch that because the argument is, and needs to be,
void *.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Reported-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Now that we added the ioctl, there's no need to ask
the user to configure this. We will keep it enabled
for now, and eventually swap the default to n. Also
let embedded users select it only if they need it.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

This ports the b43/legacy rfkill code to the new API offered
by cfg80211 and thus removes a lot of useless stuff.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

This patch introduces initial rfkill support for the ath5k driver
based on rfkill support in the cfg80211 framework.
All rfkill related code is separated into newly created rfkill.c.

Changes to existing code are minimal:

* added a new data structure ath5k_rfkill to the ath5k_softc structure
* inserted calls to HW rfkill init/deinit routines
* ath5k_intr() has been extended to handle AR5K_INT_GPIO interrupts
Signed-off-by: John W. Linville <linville@tuxdriver.com>

It is useful for debugging when we know if something disabled
the in-kernel rfkill input handler.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

This patch is a back-port from aggregation testing code.

In the past, we didn't limit the amount of active tx urbs.
However, ar9170 only has a limited buffer reserved for
pending data frames.

This wasn't much of a problem with the slower 802.11b/g.
We simply stopped the full queue and moved on to something different
in the mean time. But - as you guessed it -  this simple approach
stands in way for a decent aggregation implementation.
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

This adds new commands that the original firmware will not send
but we can use them to debug firmware.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

mac80211 is checking is the skb is aligned on 32 bit boundary.
But it is checking against ethernet header, whereas Linux expect IP
header aligned.  And ethernet ether size is 6*2+2=14, so aligning
ethernet header make IP header unaligned.
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Fix possible unaligned u32 access in b43_generate_plcp_hdr().
Unaligned data is read/write with a u32 pointer instead of using the
packed structure. Some versions of gcc ignore the "packed" attribute, if the
structure element is accessed through a local pointer.
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

The minstrel rate controller periodically looks up rate indexes in
a sampling table.  When accessing a specific row and column, minstrel
correctly does a bounds check which, on the surface, appears to handle
the case where mi->n_rates < 2.  However, mi->sample_idx is actually
defined as an unsigned, so the right hand side is taken to be a huge
positive number when negative, and the check will always fail.

Consequently, the RC will overrun the array and cause random memory
corruption when communicating with a peer that has only a single rate.
The max value of mi->sample_idx is around 25 so casting to int should
have no ill effects.

Without the change, uptime is a few minutes under load with an AP
that has a single hard-coded rate, and both the AP and STA could
potentially crash.  With the change, both lasted 12 hours with a
steady load.

Thanks to Ognjen Maric for providing the single-rate clue so I could
reproduce this.

This fixes http://bugzilla.kernel.org/show_bug.cgi?id=12490 on the
regression list (also http://bugzilla.kernel.org/show_bug.cgi?id=13000).

Cc: stable@kernel.org
Reported-by: Sergey S. Kostyliov <rathamahata@gmail.com>
Reported-by: Ognjen Maric <ognjen.maric@gmail.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

This removes the dependency on GPIO framework and lets the SPI host
driver handle the chip select. The SPI host driver is required to keep
the CS active for the entire message unless cs_change says otherwise.
This patch collects the two/three single SPI transfers into a message.
Also the delay in read path in case use_dummy_writes are not used is
moved into the SPI host driver.
Tested-by: Mike Rapoport <mike@compulab.co.il>
Tested-by: Andrey Yurovsky <andrey@cozybit.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>