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47eef9bd10
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Wey-Yi Guy 47eef9bd10 iwlwifi: Use RTS/CTS as the preferred protection mechanism for 6000 series 
When 802.11g was introduced, we had RTS/CTS and CTS-to-Self protection
mechanisms. In an HT Beacon, HT stations use the "Operating Mode" field
in the HT Information Element to determine whether or not to use
protection.

The Operating Mode field has 4 possible settings: 0-3:
Mode 0: If all stations in the BSS are 20/40 MHz HT capable, or if the
BSS is 20/40 MHz capable, or if all stations in the BSS are 20 MHz HT
stations in a 20 MHz BSS
Mode 1: used if there are non-HT stations or APs using the primary or
secondary channels
Mode 2: if only HT stations are associated in the BSS and at least one
20 MHz HT station is associated.
Mode 3: used if one or more non-HT stations are associated in the BSS.

When in operating modes 1 or 3, and the Use_Protection field is 1 in the
Beacon's ERP IE, all HT transmissions must be protected using RTS/CTS or
CTS-to-Self.

By default, CTS-to-self is the preferred protection mechanism for less
overhead and higher throughput; but using the full RTS/CTS will better
protect the inner exchange from interference, especially in
highly-congested environment.

For 6000 series WIFI NIC, RTS/CTS protection mechanism is the
recommended choice for HT traffic based on the HW design.

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>
2009-10-07 16:39:33 -04:00
..
accessibility
acpi Merge branch 'acpi-pad' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2009-10-04 15:03:00 -07:00
amba
ata trivial: fix comment typo in drivers/ata/pata_hpt37x.c 2009-09-21 15:15:53 +02:00
atm net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
auxdisplay
base mm: oom analysis: add shmem vmstat 2009-09-22 07:17:27 -07:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2009-10-04 12:39:14 -07:00
bluetooth
cdrom sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
char headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
clocksource
connector connector: Removed the destruct_data callback since it is always kfree_skb() 2009-10-02 10:54:05 -07:00
cpufreq
cpuidle cpuidle: menu governor: reduce latency on exit 2009-09-22 07:17:45 -07:00
crypto
dca
dio
dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx into for-linus 2009-09-23 18:31:11 +10:00
edac edac: core: remove completion-wait for complete with rcu_barrier 2009-09-24 07:21:05 -07:00
eisa
firewire headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
firmware mm: don't use alloc_bootmem_low() where not strictly needed 2009-09-22 07:17:38 -07:00
gpio const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
gpu Merge branch 'drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2009-09-30 08:03:00 -07:00
hid headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
hwmon ltc4215/ltc4245: Discard obsolete detect methods 2009-10-04 22:53:42 +02:00
i2c i2c: Hide probe errors caused by ACPI resource conflicts 2009-10-04 22:53:45 +02:00
ide Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2009-09-23 09:32:11 -07:00
idle
ieee1394 const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
ieee802154
infiniband net: Convert ethtool {get_stats, self_test}_count() ops to get_sset_count() 2009-10-05 00:10:10 -07:00
input headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
isdn headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
leds leds: leds-pca9532 - Drop unused module parameters 2009-10-04 22:53:43 +02:00
lguest const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
macintosh macintosh: Don't assume i2c device probing always succeeds 2009-10-04 22:53:46 +02:00
mca
md Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2009-10-04 12:39:14 -07:00
media headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
memstick memstick: move dev_dbg 2009-09-24 07:21:05 -07:00
message Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
mfd headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
misc max6875: Discard obsolete detect method 2009-10-04 22:53:41 +02:00
mmc Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-10-02 16:20:43 -07:00
mtd block: use normal I/O path for discard requests 2009-10-01 21:19:30 +02:00
net iwlwifi: Use RTS/CTS as the preferred protection mechanism for 6000 series 2009-10-07 16:39:33 -04:00
nubus
of of: remove "stm,m25p40" alias 2009-09-23 07:39:43 -07:00
oprofile cpumask: use zalloc_cpumask_var() where possible 2009-09-24 09:34:24 +09:30
parisc mm: replace various uses of num_physpages by totalram_pages 2009-09-22 07:17:38 -07:00
parport sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
pci ACPICA: fixup after acpi_get_object_info() change 2009-09-25 14:24:22 -04:00
pcmcia Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-10-02 16:20:43 -07:00
platform Merge branches 'sony-laptop', 'bugzilla-14247' and 'bugzilla-14271' into release 2009-10-02 11:27:57 -04:00
pnp ACPI: remove acpi_device.flags.hardware_id 2009-09-25 15:09:48 -04:00
power Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-09-23 03:49:27 +04:00
pps
ps3
rapidio
regulator regulator: fix voltage range in da9034 ldo12 2009-09-22 13:58:23 +01:00
rtc Merge branch 'origin' into for-linus 2009-09-24 21:22:33 +01:00
s390 qeth: Convert ethtool get_stats_count() ops to get_sset_count() 2009-10-05 00:10:09 -07:00
sbus const: make block_device_operations const 2009-09-22 07:17:25 -07:00
scsi const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
serial Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-10-02 16:20:43 -07:00
sfi SFI: remove __init from sfi_verify_table 2009-10-03 01:16:12 -04:00
sh
sn
spi spi-imx: strip down chipselect function to only drive the chipselect 2009-10-01 16:11:17 -07:00
ssb ssb/sdio: fix printk format warnings 2009-09-23 11:35:41 -04:00
staging Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2009-10-04 14:59:14 -07:00
tc
telephony
thermal thermal: add missing Kconfig dependency 2009-09-19 01:41:49 -04:00
uio const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
usb headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
uwb const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
video Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-10-02 13:37:18 -07:00
virtio virtio: add virtio IDs file 2009-09-23 22:26:32 +09:30
vlynq drivers/vlynq/vlynq.c: fix resource size off by 1 error 2009-09-24 07:21:05 -07:00
w1 ds2482: Discard obsolete detect method 2009-10-04 22:53:41 +02:00
watchdog [WATCHDOG] Add support for the Avionic Design Xanthos watchdog timer. 2009-09-25 08:38:16 +00:00
xen headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
zorro
Kconfig
Makefile Merge git://git.infradead.org/mtd-2.6 2009-09-23 10:07:49 -07:00