openwrt/staging/blogic.git
13 years agozd1211rw: reset device when CR_BCN_FIFO_SEMAPHORE freezes in beacon setup
Jussi Kivilinna [Mon, 31 Jan 2011 18:50:02 +0000 (20:50 +0200)]
zd1211rw: reset device when CR_BCN_FIFO_SEMAPHORE freezes in beacon setup

When driver fails to acquire device semaphore lock, device usually
freezes soon afterwards. So failing to acquire lock indicates us that
not everything is going right in device/fw. So reset device when
this happens.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: add TX watchdog and device resetting
Jussi Kivilinna [Mon, 31 Jan 2011 18:49:52 +0000 (20:49 +0200)]
zd1211rw: add TX watchdog and device resetting

When doing transfers at high speed for long time, tx queue can freeze. So add
tx watchdog. TX-watchdog checks for locked tx-urbs and reset hardware when
such is detected. Merely unlinking urb was not enough, device have to be
reseted. Hw settings are restored so that any open link will stay on after
reset.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: collect driver settings and add function to restore theim
Jussi Kivilinna [Mon, 31 Jan 2011 18:49:43 +0000 (20:49 +0200)]
zd1211rw: collect driver settings and add function to restore theim

We need HW hard reset later in patchset to reset device after TX-stall.
Collect all settings that we have set to driver for later reset and
add restore function.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: lower hw command timeouts
Jussi Kivilinna [Mon, 31 Jan 2011 18:49:33 +0000 (20:49 +0200)]
zd1211rw: lower hw command timeouts

Device command timeouts are set up very high (1 sec) and this causes
AP beacon to lock up for long for example. Checking timeouts on device
it's easy to see that 1 sec timeout is not needed, when device fails
to response longer timeout doesn't help:

[  473.074419] zd1211rw 1-1:1.0: print_times() Read times:
[  473.175163] zd1211rw 1-1:1.0: print_time()     0 - 10 msec: 1506
[  473.176429] zd1211rw 1-1:1.0: print_time()    11 - 50 msec: 0
[  473.177955] zd1211rw 1-1:1.0: print_time()   51 - 100 msec: 0
[  473.180703] zd1211rw 1-1:1.0: print_time()  101 - 250 msec: 0
[  473.182101] zd1211rw 1-1:1.0: print_time()  251 - 500 msec: 0
[  473.183221] zd1211rw 1-1:1.0: print_time() 500 - 1000 msec: 20
[  473.184381] zd1211rw 1-1:1.0: print_time() 1000 - ... msec: 18

Also vendor driver doesn't use this long timeout. Therefore change
timeout to 50msec.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: change interrupt URB buffer to DMA buffer
Jussi Kivilinna [Mon, 31 Jan 2011 18:49:24 +0000 (20:49 +0200)]
zd1211rw: change interrupt URB buffer to DMA buffer

As might lower beacon update CPU usage.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: use stack and preallocated memory for small cmd-buffers
Jussi Kivilinna [Mon, 31 Jan 2011 18:49:14 +0000 (20:49 +0200)]
zd1211rw: use stack and preallocated memory for small cmd-buffers

Use stack for allocing small < 64 byte arrays in zd_chip.c and preallocated
buffer in zd_usb.c. This might lower CPU usage for beacon setup.

v2:
 - Do not use stack buffers in zd_usb.c as they would be used for urb
   transfer_buffer.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: batch beacon config commands together
Jussi Kivilinna [Mon, 31 Jan 2011 18:49:05 +0000 (20:49 +0200)]
zd1211rw: batch beacon config commands together

Beacon config function writes beacon to hw one write per byte. This is very
slow (usually taking more than 100ms to finish) and causes high CPU usage
when in AP-mode (kworker at ~50% on Intel Atom N270). By batching commands
together zd_mac_config_beacon() runtime can be lowered to 1/5th and lower
CPU usage to saner levels (<10% on Atom).

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: add beacon watchdog and setting HW beacon more failsafe
Jussi Kivilinna [Mon, 31 Jan 2011 18:48:55 +0000 (20:48 +0200)]
zd1211rw: add beacon watchdog and setting HW beacon more failsafe

When doing tx/rx at high packet rate (for example simply using ping -f),
device starts to fail to respond to control messages. On non-AP modes
this only causes problems for LED updating code but when we are running
in AP-mode we are writing new beacon to HW usually every 100ms. Now if
control message fails in HW beacon setup, device lock is kept locked
and beacon data partially written. This can and usually does cause:

 1. HW beacon setup fail now on, as driver cannot acquire device lock.
 2. Beacon-done interrupt stop working as device has incomplete beacon.

Therefore make zd_mac_config_beacon() always try to release device lock
and add beacon watchdog to restart beaconing when stall is detected.

Also fix zd_mac_config_beacon() try acquiring device lock for max 500ms,
as what old code appeared to be trying to do using loop and msleep(1).

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: fix race between next beacon dtim and ieee80211_get_buffered_bc
Christian Lamparter [Mon, 31 Jan 2011 18:48:44 +0000 (20:48 +0200)]
mac80211: fix race between next beacon dtim and ieee80211_get_buffered_bc

On review of 'zd1211rw: implement beacon fetching and handling
ieee80211_get_buffered_bc()', Christian Lamparter noted that [1]:

   Since zd_beacon_done also uploads the next beacon so long in advance,
   there could be an equally long race between the outdated state of the
   next beacon's DTIM broadcast traffic indicator (802.11-2007 7.3.2.6)
   which -in your case- was uploaded almost a beacon interval ago and
   the xmit of ieee80211_get_buffered_bc *now*.

   The dtim bc/mc bit might be not set, when a mc/bc arrived after the
   beacon was uploaded, but before the "beacon done event" from the
   hardware. So, dozing stations don't expect the broadcast traffic
   and of course, they might miss it completely.

   It's probably better to fix this in mac80211 (see the attached hack).

[1] http://marc.info/?l=linux-wireless&m=129435041117256&w=2

CC: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: implement beacon fetching and handling ieee80211_get_buffered_bc()
Jussi Kivilinna [Mon, 31 Jan 2011 18:48:35 +0000 (20:48 +0200)]
zd1211rw: implement beacon fetching and handling ieee80211_get_buffered_bc()

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: let zd_set_beacon_interval() set dtim_period and add AP-beacon flag
Jussi Kivilinna [Mon, 31 Jan 2011 18:48:25 +0000 (20:48 +0200)]
zd1211rw: let zd_set_beacon_interval() set dtim_period and add AP-beacon flag

Add support for AP-mode beacon. Also disable beacon when interface is set
down as otherwise hw will keep flooding NEXT_BCN interrupts.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: fix ack_pending in filter_ack causing tx-packet ordering problem on monitor
Jussi Kivilinna [Mon, 31 Jan 2011 18:48:16 +0000 (20:48 +0200)]
zd1211rw: fix ack_pending in filter_ack causing tx-packet ordering problem on monitor

For reasons not very clear yet to me, filter_ack leaves matching tx-packet
pending with 'ack_pending'. This causes tx-packet to be passed back to upper
layer after next packet has been transfered and tx-packets might end up
coming come out of monitor interface in wrong order vs. rx.

Because of this when enable AP-mode, hostapd monitor interface would get
packets in wrong order causing problems in WPA association.

So don't use mac->ack_pending when in AP-mode.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: support setting BSSID for AP mode
Jussi Kivilinna [Mon, 31 Jan 2011 18:48:06 +0000 (20:48 +0200)]
zd1211rw: support setting BSSID for AP mode

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: move set_rts_cts_work to bss_info_changed
Jussi Kivilinna [Mon, 31 Jan 2011 18:47:56 +0000 (20:47 +0200)]
zd1211rw: move set_rts_cts_work to bss_info_changed

As bss_info_changed may sleep, we can as well set RTS_CTS register right away.
Keep mac->short_preamble for later use (hw reset).

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: move set_multicast_hash and set_rx_filter from workers to configure_filter
Jussi Kivilinna [Mon, 31 Jan 2011 18:47:46 +0000 (20:47 +0200)]
zd1211rw: move set_multicast_hash and set_rx_filter from workers to configure_filter

Workers not needed anymore since configure_filter may sleep. Keep
mac->multicast_hash for later use (hw reset).

Signed-off-by: Jussi Kivilinna <jussi.kivilina@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: fix beacon interval setup
Jussi Kivilinna [Mon, 31 Jan 2011 18:47:36 +0000 (20:47 +0200)]
zd1211rw: fix beacon interval setup

Vendor driver uses CR_BNC_INTERVAL at various places, one is HW_EnableBeacon()
that combinies beacon interval with BSS-type flag and DTIM value in upper 16bit
of u32. The other one is HW_UpdateBcnInterval() that set_aw_pt_bi()
appears to be based on. HW_UpdateBcnInterval() takes interval argument as u16
and uses that for calculations, set_aw_pt_bi() uses u32 value that has flags
and dtim in upper part. This clearly seems wrong. Also HW_UpdateBcnInterval()
updates only lower 16bit part of CR_BNC_INTERVAL. So make set_aw_pt_bi() do
calculations on only lower u16 part of s->beacon_interval.

Also set 32bit beacon interval register before reading values from device,
as HW_EnableBeacon() on vendor driver does. This is required to make beacon
work on AP-mode, simply reading and then writing updated values is not enough
at least with zd1211b.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: add locking for mac->process_intr
Jussi Kivilinna [Mon, 31 Jan 2011 18:47:27 +0000 (20:47 +0200)]
zd1211rw: add locking for mac->process_intr

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: cancel process_intr work on zd_chip_disable_int()
Jussi Kivilinna [Mon, 31 Jan 2011 18:47:17 +0000 (20:47 +0200)]
zd1211rw: cancel process_intr work on zd_chip_disable_int()

OOPS if worker is running and disconnect() is called (triggered
by unpluging device). Much harder to trigger at this stage but
later when we have AP beacon work in process_intr it happens very
easy.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agozd1211rw: use urb anchors for tx and fix tx-queue disabling
Jussi Kivilinna [Mon, 31 Jan 2011 18:47:08 +0000 (20:47 +0200)]
zd1211rw: use urb anchors for tx and fix tx-queue disabling

When stress testing AP-mode I hit OOPS when unpluging or rmmodding
driver.

It appears that when tx-queue is disabled, tx-urbs might be left pending.
These can cause ehci to call non-existing tx_urb_complete() (after rmmod)
or uninitialized/reseted private structure (after disconnect()). Add skb
queue for submitted packets and unlink pending urbs on zd_usb_disable_tx().

Part of the problem seems to be usb->free_urb_list that isn't always
working as it should, causing machine freeze when trying to free the list
in zd_usb_disable_tx(). Caching free urbs isn't what other drivers seem
to be doing (usbnet for example) so strip free_usb_list.

Patch makes tx-urb handling saner with use of urb anchors.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: Add testing functionality for TKIP
Jouni Malinen [Thu, 3 Feb 2011 16:35:19 +0000 (18:35 +0200)]
mac80211: Add testing functionality for TKIP

TKIP countermeasures depend on devices being able to detect Michael
MIC failures on received frames and for stations to report errors to
the AP. In order to test that behavior, it is useful to be able to
send out TKIP frames with incorrect Michael MIC. This testing behavior
has minimal effect on the TX path, so it can be added to mac80211 for
convenient use.

The interface for using this functionality is a file in mac80211
netdev debugfs (tkip_mic_test). Writing a MAC address to the file
makes mac80211 generate a dummy data frame that will be sent out using
invalid Michael MIC value. In AP mode, the address needs to be for one
of the associated stations or ff:ff:ff:ff:ff:ff to use a broadcast
frame. In station mode, the address can be anything, e.g., the current
BSSID. It should be noted that this functionality works correctly only
when associated and using TKIP.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: Remove obsolete TKIP flexibility
Jouni Malinen [Thu, 3 Feb 2011 16:34:28 +0000 (18:34 +0200)]
mac80211: Remove obsolete TKIP flexibility

The TKIP implementation was originally prepared to be a bit more
flexible in the way Michael MIC TX/RX keys are configured. However, we
are now taking care of the TX/RX MIC key swapping in user space, so
this code will not be needed. Similarly, there were some remaining WPA
testing code that won't be used in their current form. Remove the
unneeded extra complexity.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agodrivers:net:ipw2100.c change a typo comamnd to command
Justin P. Mattock [Wed, 2 Feb 2011 05:06:21 +0000 (21:06 -0800)]
drivers:net:ipw2100.c change a typo comamnd to command

The below patch fixes a typo comamnd to command.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k: reserve a beacon slot on beaconing vif addition
Rajkumar Manoharan [Tue, 1 Feb 2011 17:35:36 +0000 (23:05 +0530)]
ath9k: reserve a beacon slot on beaconing vif addition

The beaconing vif addition is based on max beacon slot
available. So it is better to reserve a beacon slot
on interface addition and let it be configured properly
on bss_info change.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: allow GO to scan like AP
Johannes Berg [Tue, 1 Feb 2011 14:35:36 +0000 (15:35 +0100)]
mac80211: allow GO to scan like AP

There's no point in disallowing scanning for a
GO interface when it's not beaconing yet.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: pass up beacons from external BSS when operating as AP
Arik Nemtsov [Tue, 1 Feb 2011 11:23:05 +0000 (13:23 +0200)]
mac80211: pass up beacons from external BSS when operating as AP

Beacons from external BSSes are required for updating overlapping BSS
info (i.e. ERP protection). Pass them up unconditionally.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: add HW flag for disabling auto link-PS in AP mode
Arik Nemtsov [Mon, 31 Jan 2011 20:29:13 +0000 (22:29 +0200)]
mac80211: add HW flag for disabling auto link-PS in AP mode

When operating in AP mode the wl1271 hardware filters out null-data
packets as well as management packets. This makes it impossible for
mac80211 to monitor the PS mode by using the PM bit of incoming frames.

Implement a HW flag to indicate that mac80211 should ignore the PM bit.
In addition, expose ieee80211_sta_ps_transition() to make low-level
drivers capable of controlling PS-mode.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: do not calc frame duration when using HW rate-control
Arik Nemtsov [Mon, 31 Jan 2011 20:29:12 +0000 (22:29 +0200)]
mac80211: do not calc frame duration when using HW rate-control

When rate-control is performed in HW, we cannot calculate frame
duration as we do not have the skb transmission rate in SW.

ieee80211_tx_h_calculate_duration() should only be called when
ieee80211_tx_h_rate_ctrl() has been called before to initialize data
in skb->cb. This doesn't happen for drivers with HW rate-control.

Fixes the following warning when operating in AP-mode
in a driver with HW rate-control.

WARNING: at net/mac80211/tx.c:57 ieee80211_duration+0x54/0x1d8 [mac80211]()
Modules linked in: wl1271_sdio wl1271 firmware_class crc7 mac80211 cfg80211
[<c0046090>] (unwind_backtrace+0x0/0x124) from [<c0064c10>] (warn_slowpath_common+0x4c/0x64)
[<c0064c10>] (warn_slowpath_common+0x4c/0x64) from [<c0064c40>] (warn_slowpath_null+0x18/0x1c)
[<c0064c40>] (warn_slowpath_null+0x18/0x1c) from [<bf040e34>] (ieee80211_duration+0x54/0x1d8 [mac80211])
[<bf040e34>] (ieee80211_duration+0x54/0x1d8 [mac80211]) from [<bf04200c>] (invoke_tx_handlers+0xfa0/0x1088 [mac80211])
[<bf04200c>] (invoke_tx_handlers+0xfa0/0x1088 [mac80211]) from [<bf042178>] (ieee80211_tx+0x84/0x248 [mac80211])
[<bf042178>] (ieee80211_tx+0x84/0x248 [mac80211]) from [<bf042f44>] (ieee80211_tx_pending+0x12c/0x278 [mac80211])
[<bf042f44>] (ieee80211_tx_pending+0x12c/0x278 [mac80211]) from [<c0069a9c>] (tasklet_action+0x68/0xbc)
[<c0069a9c>] (tasklet_action+0x68/0xbc) from [<c006a044>] (__do_softirq+0x84/0x114)
[<c006a044>] (__do_softirq+0x84/0x114) from [<c006a1b8>] (do_softirq+0x48/0x54)
[<c006a1b8>] (do_softirq+0x48/0x54) from [<c006a4f8>] (local_bh_enable+0x98/0xcc)
[<c006a4f8>] (local_bh_enable+0x98/0xcc) from [<bf074e60>] (wl1271_rx+0x2e8/0x3a4 [wl1271])
[<bf074e60>] (wl1271_rx+0x2e8/0x3a4 [wl1271]) from [<bf071ae4>] (wl1271_irq_work+0x230/0x310 [wl1271])
[<bf071ae4>] (wl1271_irq_work+0x230/0x310 [wl1271]) from [<c0076864>] (process_one_work+0x208/0x350)
[<c0076864>] (process_one_work+0x208/0x350) from [<c0076e14>] (worker_thread+0x1cc/0x300)
[<c0076e14>] (worker_thread+0x1cc/0x300) from [<c007bb88>] (kthread+0x84/0x8c)
[<c007bb88>] (kthread+0x84/0x8c) from [<c0041494>] (kernel_thread_exit+0x0/0x8)

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: Recalculate channel-type on iface removal.
Ben Greear [Mon, 31 Jan 2011 19:30:09 +0000 (11:30 -0800)]
mac80211: Recalculate channel-type on iface removal.

When a vif goes away, it could cause the super-chan
to be recalculated differently, so do that calculation
on iface removal.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k: Show channel type and frequency in debugfs.
Ben Greear [Mon, 31 Jan 2011 18:37:36 +0000 (10:37 -0800)]
ath9k: Show channel type and frequency in debugfs.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k: do not access hw registers in FULL SLEEP
Rajkumar Manoharan [Mon, 31 Jan 2011 18:17:46 +0000 (23:47 +0530)]
ath9k: do not access hw registers in FULL SLEEP

The opmode recalculation is accessing hw registers.
When it is called from remove interface callback and
if there are no vifs present then hw is moved to FULL SLEEP
by radio disable. So use power save wrappers before
accessing hw registers in calculating opmode state.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k_htc: make use common of function to update txpower
Rajkumar Manoharan [Mon, 31 Jan 2011 18:17:45 +0000 (23:47 +0530)]
ath9k_htc: make use common of function to update txpower

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k: move update tx power to common
Rajkumar Manoharan [Mon, 31 Jan 2011 18:17:44 +0000 (23:47 +0530)]
ath9k: move update tx power to common

move ath_update_txpow to common to remove code duplication
in both ath9k & ath9k_htc.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k: use common get current channel function
Rajkumar Manoharan [Mon, 31 Jan 2011 18:17:43 +0000 (23:47 +0530)]
ath9k: use common get current channel function

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k_htc: cancel ani work in ath9k_htc_stop
Rajkumar Manoharan [Mon, 31 Jan 2011 18:17:42 +0000 (23:47 +0530)]
ath9k_htc: cancel ani work in ath9k_htc_stop

ani work is cancelled in dissaoctiation. But in some cases
during suspend, deauthention never be called. So we failed
to stop ani work which was identified by the following
warning.

Call Trace:
 [<ffffffffa0454a1d>] ieee80211_can_queue_work.clone.17+0x2d/0x40 [mac80211]
 [<ffffffffa0454a60>] ieee80211_queue_delayed_work+0x30/0x60 [mac80211]
 [<ffffffffa0567f82>] ath9k_ani_work+0x142/0x250 [ath9k_htc]
 [<ffffffff81073c70>] async_run_entry_fn+0x0/0x180
 [<ffffffffa0567e40>] ath9k_ani_work+0x0/0x250 [ath9k_htc]

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agocfg80211: Fix power save state after interface type change
Juuso Oikarinen [Mon, 31 Jan 2011 13:52:58 +0000 (15:52 +0200)]
cfg80211: Fix power save state after interface type change

Currently cfg80211 only configures the PSM state to the driver upon creation
of a new virtual interface, but not after interface type change. The mac80211
on the other hand reinitializes its sdata structure every time the interface
type is changed, losing the PSM configuration.

Hence, if the interface type is changed to, say, ad-hoc and then back to
managed, "iw wlan0 get power_save" will claim that PSM is enabled, when in
fact on mac80211 level it is not.

Fix this in cfg80211 by configuring the PSM state to the driver each time
the interface is brought up instead of just when the interface is created.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agowl1251: set rate index and preamble flag on received packets
David Gnedt [Sun, 30 Jan 2011 19:11:10 +0000 (20:11 +0100)]
wl1251: set rate index and preamble flag on received packets

Set the rate index rate_idx and preamble flag RX_FLAG_SHORTPRE on received
packets.

Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agowl1251: enable adhoc mode
David Gnedt [Sun, 30 Jan 2011 19:11:04 +0000 (20:11 +0100)]
wl1251: enable adhoc mode

Enable adhoc support in wl1251 driver.

Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agowl1251: implement connection quality monitoring
David Gnedt [Sun, 30 Jan 2011 19:11:00 +0000 (20:11 +0100)]
wl1251: implement connection quality monitoring

Implement connection quality monitoring similar to the wl1271 driver.
It triggers ieee80211_cqm_rssi_notify with the corresponding event when
RSSI drops blow RSSI threshold or rises again above the RSSI threshold.
It should be noted that wl1251 doesn't support RSSI hysteresis, instead it
uses RSSI averageing and delays events until a certain count of frames
proved RSSI change.

Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agowl1251: enable beacon early termination while in power-saving mode
David Gnedt [Sun, 30 Jan 2011 19:10:57 +0000 (20:10 +0100)]
wl1251: enable beacon early termination while in power-saving mode

Port the beacon early termination feature from wl1251 driver version
included in the Maemo Fremantle kernel.
It is enabled when going to power-saving mode and disabled when leaving
power-saving mode.

Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agowl1251: fix 4-byte TX buffer alignment
David Gnedt [Sun, 30 Jan 2011 19:10:48 +0000 (20:10 +0100)]
wl1251: fix 4-byte TX buffer alignment

This implements TX buffer alignment for cloned or too small skb by
copying and replacing the original skb.
Recent changes in wireless-testing seems to make this really necessary.

Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agowl1251: fix queue stopping/waking for TX path
David Gnedt [Sun, 30 Jan 2011 19:10:46 +0000 (20:10 +0100)]
wl1251: fix queue stopping/waking for TX path

The queue stopping/waking functionality was broken in a way that could
cause the TX to stall if the right circumstances are met.

The problem was caused by tx_work, which is scheduled on each TX operation.
If the firmware buffer is full, tx_work does nothing. In combinition with
stopped queues or non-continues transfers, tx_work is never scheduled again.
Moreover the low watermark introduced by
9df86e2e702c6d5547aced7f241addd2d698bb11 never takes effect because of some
old code.

Solve this by scheduling tx_work every time tx_queue is non-empty and
firmware buffer is freed on tx_complete.

This also solves a possible but unlikely case: If less frames than the high
watermark are queued, but more than firmware buffer can hold. This results
in queues staying awake but the only scheduled tx_work doesn't transfer all
frames, so the remaining frames are stuck in the queue until more frames
get queued and tx_work is scheduled again.

Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: Warn users if HT fails because of freq mismatch.
Ben Greear [Sat, 29 Jan 2011 01:05:43 +0000 (17:05 -0800)]
mac80211: Warn users if HT fails because of freq mismatch.

I have a netgear WNDR3700 that appears to have an off-by-four
bug in how it fills out the hti->control_chan (I configure the
AP to channel 11, it reports 15 as control_chan).

Poke a message into the kernel logs to give users a
clue as to why they are not getting the expected
channel-type or rate.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: Show configured channel-type in netdev debugfs.
Ben Greear [Sat, 29 Jan 2011 01:05:42 +0000 (17:05 -0800)]
mac80211: Show configured channel-type in netdev debugfs.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: Be more careful when changing channels.
Ben Greear [Fri, 28 Jan 2011 18:20:47 +0000 (10:20 -0800)]
mac80211: Be more careful when changing channels.

If we cannot set the channel type, set the channel back to the
original.

Don't update the driver hardware if nothing actually changed.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agolibertas: Prepare stuff for if_spi.c pm support
Vasily Khoruzhick [Fri, 21 Jan 2011 20:44:49 +0000 (22:44 +0200)]
libertas: Prepare stuff for if_spi.c pm support

To support suspend/resume in if_spi we need two things:
- re-setup fw in lbs_resume(), because if_spi powercycles card;
- don't touch hwaddr on second lbs_update_hw_spec() call for same
  reason;

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agolibertas_spi: Use workqueue in hw_host_to_card
Vasily Khoruzhick [Fri, 21 Jan 2011 20:44:48 +0000 (22:44 +0200)]
libertas_spi: Use workqueue in hw_host_to_card

Use workqueue to perform SPI xfers, it's necessary to fix
nasty "BUG: scheduling while atomic", because
spu_write() calls spi_sync() and spi_sync() may sleep, but
hw_host_to_card() callback can be called from atomic context.
Remove kthread completely, workqueue now does its job.
Restore intermediate buffers which were removed in commit
86c34fe89e9cad9e1ba4d1a8bbf98259035f4caf that introduced
mentioned bug.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoMerge branch 'wireless-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git...
John W. Linville [Thu, 3 Feb 2011 21:35:20 +0000 (16:35 -0500)]
Merge branch 'wireless-next-2.6' of git://git./linux/kernel/git/iwlwifi/iwlwifi-2.6

13 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Tue, 1 Feb 2011 17:01:27 +0000 (12:01 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6

Conflicts:
drivers/net/wireless/wl12xx/spi.c

13 years agoath9k: Fix memory leak due to failed PAPRD frames
Mohammed Shafi Shajakhan [Mon, 31 Jan 2011 07:55:29 +0000 (13:25 +0530)]
ath9k: Fix memory leak due to failed PAPRD frames

free the skb's when the Tx of PAPRD frames fails and also add a debug
message indicating that.

Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiiwlagn: remove unused parameter
Wey-Yi Guy [Sat, 29 Jan 2011 16:13:27 +0000 (08:13 -0800)]
iiwlagn: remove unused parameter

sco_cmd is not being used, remove it

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlagn: remove unsupported BT SCO command
Wey-Yi Guy [Thu, 27 Jan 2011 21:01:33 +0000 (13:01 -0800)]
iwlagn: remove unsupported BT SCO command

During the period of BT coex changes, REPLY_BT_COEX_SCO host command
is no longer needed to support SCO/eSCO type of traffic. delete it.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlagn: use 2030 macro for 2030 devices
Wey-Yi Guy [Mon, 24 Jan 2011 19:44:42 +0000 (11:44 -0800)]
iwlagn: use 2030 macro for 2030 devices

For 2030 series of devices, 2030 macro need to be used.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlwifi: fix beacon notification parsing
Johannes Berg [Wed, 19 Jan 2011 19:11:22 +0000 (11:11 -0800)]
iwlwifi: fix beacon notification parsing

The beacon notification changed between 4965 and
agn because the embedded TX response changed, but
iwlwifi was never updated to know about this.
Update it now so the IBSS manager status will be
tracked correctly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlwifi: use maximum aggregation size
Johannes Berg [Wed, 19 Jan 2011 10:53:54 +0000 (02:53 -0800)]
iwlwifi: use maximum aggregation size

Use the values from the peer to set up the ucode
for the right maximum number of subframes in an
aggregate. Since the ucode only tracks this per
station, use the minimum across all aggregation
sessions with this peer.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlwifi: advertise max aggregate size
Johannes Berg [Wed, 19 Jan 2011 10:54:18 +0000 (02:54 -0800)]
iwlwifi: advertise max aggregate size

Allow peers to size their reorder buffer more
accurately by advertising that we'll never send
aggregates longer than the default (31).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlwifi: support RSN IBSS
Johannes Berg [Tue, 18 Jan 2011 12:44:03 +0000 (04:44 -0800)]
iwlwifi: support RSN IBSS

In order to support RSN IBSS, we need to
(ok actually maybe it's just easiest to)
disable group key programming so that any
group-addressed frames will be decrypted
in software which handles the per-station
keys for this easily. We could keep the
encryption in the device, but that takes
more work and seems unnecessary.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlwifi: always support idle mode for agn devices
Wey-Yi Guy [Mon, 17 Jan 2011 19:05:52 +0000 (11:05 -0800)]
iwlwifi: always support idle mode for agn devices

For agn devices, always support idle mode which help power
consumption in idle unassociated state.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlagn: add IQ inversion support for 2000 series devices
Wey-Yi Guy [Tue, 18 Jan 2011 16:58:48 +0000 (08:58 -0800)]
iwlagn: add IQ inversion support for 2000 series devices

The I/Q swapping is extremely important and should be dealt with extra care.
It will affects OFDM and CCK differently.

For 6000/6005/6030 series devices, the I/Q were swapped, and for 2000 series
devices, it is in non-swapped status (but its swapped with respected to 6000/6005/6030).
so the CSR_GP_DRIVER_REG_BIT_RADIO_IQ_INVER register need to be set to support
the correct behavior.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlagn: adjust rate table
Wey-Yi Guy [Sat, 15 Jan 2011 17:16:59 +0000 (09:16 -0800)]
iwlagn: adjust rate table

Minor adjustment for rate scale table

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoiwlwifi: check ucode loading error and restart
Wey-Yi Guy [Sat, 15 Jan 2011 01:48:06 +0000 (17:48 -0800)]
iwlwifi: check ucode loading error and restart

Driver check alive message from ucode, if it is not ok, then need
to restart the loading process. instead of checking multiple places
for failure, only need to check in once place when receive alive
message from uCode.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
13 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Mon, 31 Jan 2011 20:24:31 +0000 (15:24 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6

Conflicts:
drivers/net/wireless/wl12xx/spi.c

13 years agowl12xx: fix warning due to missing arg in ampdu_action
Luciano Coelho [Mon, 31 Jan 2011 07:41:52 +0000 (09:41 +0200)]
wl12xx: fix warning due to missing arg in ampdu_action

Commit 0b01f030d38e00650e2db42da083d8647aad40a5 added a new argument
to the ampdu_action operation.  The ampdu_action operation in the
wl12xx driver currently doesn't have that argument and this generates
a warning.  This happened during merging of the latest mac80211
patches with the wl12xx BA patches.

  CC [M]  drivers/net/wireless/wl12xx/main.o
drivers/net/wireless/wl12xx/main.c:3035: warning: initialization from incompatible pointer type

The wl12xx driver doesn't need to do anything about the buf_size
argument since the AMPDU TX is fully handled by the firmware.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: disable power save if an infra AP vif exists
Rajkumar Manoharan [Mon, 31 Jan 2011 18:58:59 +0000 (00:28 +0530)]
mac80211: disable power save if an infra AP vif exists

PS should not be enabled if an infra AP vif exists in
the interface list. So while recalculating PS,
AP vif type should be taken into account.

Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwlwifi: correct frequency settings
Stanislaw Gruszka [Mon, 31 Jan 2011 12:01:35 +0000 (13:01 +0100)]
iwlwifi: correct frequency settings

After commit 59eb21a6504731fc16db4cf9463065dd61093e08
"cfg80211: Extend channel to frequency mapping for 802.11j"
we use uninitialized sband->band when assign channel frequencies, what
results that 5GHz channels have erroneous (zero) center_freq value.

Patch fixes problem and simplifies code a bit.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Move TX/RX work into dedicated workqueue
Ivo van Doorn [Sun, 30 Jan 2011 12:24:05 +0000 (13:24 +0100)]
rt2x00: Move TX/RX work into dedicated workqueue

The TX/RX work structures must be able to run independently
of other workqueues. This is because mac80211 might use
the flush() callback function from various context, which depends
on the TX/RX work to complete while the main thread is blocked
(until the the TX queues are empty).

This should reduce the number of  'Queue %d failed to flush' warnings.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Kill all tasklets during device removal
Ivo van Doorn [Sun, 30 Jan 2011 12:23:42 +0000 (13:23 +0100)]
rt2x00: Kill all tasklets during device removal

During device removal all pending work and tasklets must
be guaranteed to be halted. So far only the txstatus_tasklet
was killed.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Fix FIXME comments in rt61pci and rt73usb on Michael MIC.
Gertjan van Wingerde [Sun, 30 Jan 2011 12:23:22 +0000 (13:23 +0100)]
rt2x00: Fix FIXME comments in rt61pci and rt73usb on Michael MIC.

Both rt61pci and rt73usb check the Michael MIC in hardware and strip the
Michael MIC from received frames. This is perfectly allowed by mac80211 as
long as this is properly reported to mac80211.
Both these drivers reported the Michael MIC handling properly to mac80211, but
still contained a FIXME comment on this, which is not needed to be handled, since
mac80211 doesn't really need the Michael MIC in this case.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Copy the MAC address to the WCID entry properly.
Gertjan van Wingerde [Sun, 30 Jan 2011 12:23:03 +0000 (13:23 +0100)]
rt2x00: Copy the MAC address to the WCID entry properly.

Use the specific mac field of the wcid_entry structure to copy the MAC
address to, instead of just overwriting the structure.
Previous code resulted in the same, but this form is cleaner.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Fix WPA TKIP Michael MIC failures.
Gertjan van Wingerde [Sun, 30 Jan 2011 12:22:41 +0000 (13:22 +0100)]
rt2x00: Fix WPA TKIP Michael MIC failures.

As reported and found by Johannes Stezenbach:
rt2800{pci,usb} do not report the Michael MIC in RXed frames, but do check
the Michael MIC in hardware. Therefore we have to report to mac80211 that the
received frame does not include the Michael MIC.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: trivial: add \n to WARNING message
Johannes Stezenbach [Sun, 30 Jan 2011 12:22:22 +0000 (13:22 +0100)]
rt2x00: trivial: add \n to WARNING message

Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoTrivial typo fix in comment
Mark Einon [Sun, 30 Jan 2011 12:22:03 +0000 (13:22 +0100)]
Trivial typo fix in comment

  Fixing a trivial comment typo.

Signed-off-by: Mark Einon <mark.einon@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Update MAINTAINERS
Helmut Schaa [Sun, 30 Jan 2011 12:21:41 +0000 (13:21 +0100)]
rt2x00: Update MAINTAINERS

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Correct initial value of US_CYC_CNT register for pcie interface
RA-Jay Hung [Sun, 30 Jan 2011 12:21:22 +0000 (13:21 +0100)]
rt2x00: Correct initial value of US_CYC_CNT register for pcie interface

CLOCK CYCLE: Clock cycle count in 1us
PCI:0x21, PCIE:0x7d, USB:0x1e

Signed-off-by: RA-Jay Hung <jay_hung@ralinktech.com>
Acked-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Remove STATE_RADIO_IRQ_OFF_ISR and STATE_RADIO_IRQ_ON_ISR
Helmut Schaa [Sun, 30 Jan 2011 12:20:52 +0000 (13:20 +0100)]
rt2x00: Remove STATE_RADIO_IRQ_OFF_ISR and STATE_RADIO_IRQ_ON_ISR

Remove STATE_RADIO_IRQ_OFF_ISR and STATE_RADIO_IRQ_ON_ISR as they are
not used anymore.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Remove interrupt thread registration
Helmut Schaa [Sun, 30 Jan 2011 12:20:29 +0000 (13:20 +0100)]
rt2x00: Remove interrupt thread registration

No driver uses interrupt threads anymore. Remove the remaining interrupt
thread artifacts.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Convert rt2400pci interrupt handling to use tasklets
Helmut Schaa [Sun, 30 Jan 2011 12:20:05 +0000 (13:20 +0100)]
rt2x00: Convert rt2400pci interrupt handling to use tasklets

Fix interrupt processing on slow machines by using individual tasklets
for each different device interrupt. This ensures that while a RX or TX
status tasklet is scheduled only the according device interrupt is
masked and other interrupts such as TBTT can still be processed.

Also, this allows us to use tasklet_hi_schedule for TBTT processing
which is required to not send out beacons with a wrong DTIM count (due
to delayed periodic beacon updates). Furthermore, this improves the
latency between the TBTT and sending out buffered multi- and broadcast
traffic.

As a nice bonus, the interrupt handling overhead should be much lower.

Compile-tested only.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Convert rt2500pci interrupt handling to use tasklets
Helmut Schaa [Sun, 30 Jan 2011 12:19:37 +0000 (13:19 +0100)]
rt2x00: Convert rt2500pci interrupt handling to use tasklets

Fix interrupt processing on slow machines by using individual tasklets
for each different device interrupt. This ensures that while a RX or TX
status tasklet is scheduled only the according device interrupt is
masked and other interrupts such as TBTT can still be processed.

Also, this allows us to use tasklet_hi_schedule for TBTT processing
which is required to not send out beacons with a wrong DTIM count (due
to delayed periodic beacon updates). Furthermore, this improves the
latency between the TBTT and sending out buffered multi- and broadcast
traffic.

As a nice bonus, the interrupt handling overhead should be much lower.

Compile-tested only.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Convert rt61pci to use tasklets
Helmut Schaa [Sun, 30 Jan 2011 12:19:08 +0000 (13:19 +0100)]
rt2x00: Convert rt61pci to use tasklets

Fix interrupt processing on slow machines by using individual tasklets
for each different device interrupt. This ensures that while a RX or TX
status tasklet is scheduled only the according device interrupt is
masked and other interrupts such as TBTT can still be processed.

Also, this allows us to use tasklet_hi_schedule for TBTT processing
which is required to not send out beacons with a wrong DTIM count (due
to delayed periodic beacon updates). Furthermore, this improves the
latency between the TBTT and sending out buffered multi- and broadcast
traffic.

As a nice bonus, the interrupt handling overhead should be much lower.

Compile-tested only.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Convert rt2800pci to use tasklets
Helmut Schaa [Sun, 30 Jan 2011 12:18:38 +0000 (13:18 +0100)]
rt2x00: Convert rt2800pci to use tasklets

Fix interrupt processing on slow machines by using individual tasklets
for each different device interrupt. This ensures that while a RX or TX
status tasklet is scheduled only the according device interrupt is
masked and other interrupts such as TBTT can still be processed.

Also, this allows us to use tasklet_hi_schedule for TBTT and PRETBTT
processing which is required to not send out beacons with a wrong DTIM
count (due to delayed periodic beacon updates). Furthermore, this
improves the latency between the TBTT and sending out buffered multi-
and broadcast traffic.

As a nice bonus, the interrupt handling overhead is reduced such that
rt2800pci gains around 25% more throuhput on a rt3052 MIPS board.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Disable txstatus tasklet by default
Helmut Schaa [Sun, 30 Jan 2011 12:18:13 +0000 (13:18 +0100)]
rt2x00: Disable txstatus tasklet by default

Enable the txstatus tasklet when interrupts are enabled and disable it
together with the interrupts. Also make the txstatus tasklet useful even
without the tx status FIFO and make use of the generic rt2x00 tasklet
initialization macro.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Introduce tasklets for interrupt handling
Helmut Schaa [Sun, 30 Jan 2011 12:17:52 +0000 (13:17 +0100)]
rt2x00: Introduce tasklets for interrupt handling

No functional changes, just preparation for moving interrupt handling to
tasklets. The tasklets are disabled by default. Drivers making use of
them need to enable the tasklets when the device state is set to IRQ_ON.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Make periodic beacon updates for PCI devices atomic
Helmut Schaa [Sun, 30 Jan 2011 12:17:29 +0000 (13:17 +0100)]
rt2x00: Make periodic beacon updates for PCI devices atomic

Allow the beacondone and pretbtt functions to update the beacon from
atomic context by using the beacon update functions with caller locking.

This is a preparation for moving the periodic beacon handling into
tasklets that require atomic context.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Limit beacon updates in bss_info_changed to USB devices
Helmut Schaa [Sun, 30 Jan 2011 12:16:52 +0000 (13:16 +0100)]
rt2x00: Limit beacon updates in bss_info_changed to USB devices

Currently there are two places that trigger a beacon update on PCI
devices. The bss_info_changed callback and the periodic update
triggered by the TBTT or PRETBTT interrupt.

Since the next TBTT or PRETBTT interrupt will periodically fetch an
updated beacon remove the update_beacon call in the bss_info_changed
callback for PCI devices.

In the worst case it will take one beacon interval longer to fetch
the new beacon then before. For devices that have a PRETBTT interrupt
there should be no change at all.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Introduce beacon_update_locked that requires caller locking
Helmut Schaa [Sun, 30 Jan 2011 12:16:28 +0000 (13:16 +0100)]
rt2x00: Introduce beacon_update_locked that requires caller locking

Introduce a beacon_update_locked function that does not acquire the
according beacon mutex to allow beacon updates from atomic context. The
caller has to take care of synchronization.

No functional changes. Just preparation for beacon updates from tasklet
context.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agort2x00: Refactor beacon code to make use of start- and stop_queue
Helmut Schaa [Sun, 30 Jan 2011 12:16:03 +0000 (13:16 +0100)]
rt2x00: Refactor beacon code to make use of start- and stop_queue

This patch allows to dynamically remove beaconing interfaces without
shutting beaconing down on all interfaces.

The only place to start and stop beaconing are now the start- and
stop_queue callbacks. Hence, we can remove some register writes during
interface bring up (config_intf) and only write the correct sync mode
to the register there.

When multiple beaconing interfaces are present we should enable
beaconing as soon as mac80211 enables beaconing on at least one of
them. The beacon queue gets stopped when the last beaconing
interface was stopped by mac80211. Therefore, introduce another
interface counter to keep track ot the number of enabled beaconing
interfaces and start or stop the beacon queue accordingly.

To allow single interfaces to stop beaconing, add a new driver
callback clear_beacon to clear a single interface's beacon without
affecting the other interfaces. Don't overload the clear_entry callback
for clearing beacons as that would introduce additional overhead
(check for each TX queue) into the clear_entry callback which is used
on the drivers TX/RX hotpaths.

Furthermore, the write beacon callback doesn't need to enable beaconing
anymore but since beaconing should be disabled while a new beacon is
written or cleared we still disable beacon generation and enable it
afterwards again in the driver specific callbacks. However, beacon
related interrupts should not be disabled/enabled here, that's solely
done from the start- and stop queue callbacks. It would be nice to stop
the beacon queue just before the beacon update and enable it afterwards
in rt2x00queue itself instead of the current implementation that relies
on the driver doing the right thing. However, since start- and
stop_queue are mutex protected we cannot use them for atomic beacon
updates.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwl3945: do not use agn specific IWL_RATE_COUNT
Stanislaw Gruszka [Fri, 28 Jan 2011 15:47:49 +0000 (16:47 +0100)]
iwl3945: do not use agn specific IWL_RATE_COUNT

Only use IWL_RATE_COUNT_3945 in 3945 code.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agowl12xx: fix use after free
Mathias Krause [Sun, 30 Jan 2011 10:29:47 +0000 (11:29 +0100)]
wl12xx: fix use after free

When DEBUG_SPI is included in the debug log level wl1271_spi_reset()
will dump the already freed memory instead of the SPI buffer.

This bug was spotted by the semantic patch tool coccinelle using the
script found at scripts/coccinelle/free/kfree.cocci.

More information about semantic patching is available at
http://coccinelle.lip6.fr/

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k: Fix memory leak due to failed PAPRD frames
Mohammed Shafi Shajakhan [Mon, 31 Jan 2011 07:55:29 +0000 (13:25 +0530)]
ath9k: Fix memory leak due to failed PAPRD frames

free the skb's when the Tx of PAPRD frames fails and also add a debug
message indicating that.

Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Fri, 28 Jan 2011 21:23:14 +0000 (16:23 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6

Conflicts:
drivers/net/wireless/ath/ath9k/init.c

13 years agoath9k: fix compile error in non-debug ath_debug_stat_tx() stub
Felix Fietkau [Fri, 28 Jan 2011 16:52:49 +0000 (17:52 +0100)]
ath9k: fix compile error in non-debug ath_debug_stat_tx() stub

"ath9k: fix tx queue index confusion in debugfs code" changed the debug
function but not the stub.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwlwifi: introduce iwl_bt_statistics
Stanislaw Gruszka [Fri, 28 Jan 2011 15:47:51 +0000 (16:47 +0100)]
iwlwifi: introduce iwl_bt_statistics

We use priv->cfg->bt_params && priv->cfg->bt_params->bt_statistics
conditional in few places, merge it into one function.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwlwifi: remove unneeded disable_hw_scan check
Stanislaw Gruszka [Fri, 28 Jan 2011 15:47:48 +0000 (16:47 +0100)]
iwlwifi: remove unneeded disable_hw_scan check

We never set STATUS_SCANNING in softwre scanning mode, disable_hw_scan
check is unneeded. Correct debug message while at it.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwlwifi: introduce iwl_advanced_bt_coexist()
Stanislaw Gruszka [Fri, 28 Jan 2011 15:47:47 +0000 (16:47 +0100)]
iwlwifi: introduce iwl_advanced_bt_coexist()

We use priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist
conditional in few places, merge it into one function.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwlwifi: remove unneeded __packed
Stanislaw Gruszka [Fri, 28 Jan 2011 15:47:46 +0000 (16:47 +0100)]
iwlwifi: remove unneeded __packed

struct iwl_queue is not part of firmware interface, so __packed is not
needed. Remove it since is may affect performance.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwl3945: set STATUS_READY before commit_rxon
Stanislaw Gruszka [Fri, 28 Jan 2011 15:47:45 +0000 (16:47 +0100)]
iwl3945: set STATUS_READY before commit_rxon

Similar change as we already do for agn, need to avoid
"Error setting Tx power (-5)" message when loading module.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoiwlwifi: do not set tx power when channel is changing
Stanislaw Gruszka [Fri, 28 Jan 2011 15:47:44 +0000 (16:47 +0100)]
iwlwifi: do not set tx power when channel is changing

Mac80211 can request for tx power and channel change in one ->config
call. If that happens, *_send_tx_power functions will try to setup tx
power for old channel, what can be not correct because we already change
the band. I.e  error  "Failed to get channel info for channel 140 [0]",
can be printed frequently when operating in software scanning mode.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agonet/wireless/nl80211.c: Avoid call to genlmsg_cancel
Julia Lawall [Fri, 28 Jan 2011 14:17:11 +0000 (15:17 +0100)]
net/wireless/nl80211.c: Avoid call to genlmsg_cancel

genlmsg_cancel subtracts some constants from its second argument before
calling nlmsg_cancel.  nlmsg_cancel then calls nlmsg_trim on the same
arguments.  nlmsg_trim tests for NULL before doing any computation, but a
NULL second argument to genlmsg_cancel is no longer NULL due to the initial
subtraction.  Nothing else happens in this execution, so the call to
genlmsg_cancel is simply unnecessary in this case.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression data;
@@

if (data == NULL) { ...
* genlmsg_cancel(..., data);
  ...
  return ...;
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath5k: Fix short and long retry configuration
Bruno Randolf [Fri, 28 Jan 2011 07:52:11 +0000 (16:52 +0900)]
ath5k: Fix short and long retry configuration

The register definition for retry configuration on AR5212 was wrong, and simply
copied over from AR5210. Update the register definitions from the documentation.

Let the short and long retries be configured from mac80211 and use the standard
values of 7 and 4 by default. Also we need to make sure we don't export more
retries than we are configured for to mac80211 (and the rate module) in
hw->max_rate_tries.

Also clean up the code by removing unused defines and variables and drop the
different values for "station retries" - if these need to be different it can
be handled tru ah_retry_long/short.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agomac80211: Add sdata state and flags to debugfs.
Ben Greear [Fri, 28 Jan 2011 06:09:34 +0000 (22:09 -0800)]
mac80211: Add sdata state and flags to debugfs.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
13 years agoath9k: use common API to avoid code duplication
Rajkumar Manoharan [Fri, 28 Jan 2011 06:05:43 +0000 (11:35 +0530)]
ath9k: use common API to avoid code duplication

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