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Helmut Schaa e69deded2b mac80211: Tear down BA session on BAR tx failure 
As described at [1] some STAs (i.e. Intel 5100 Windows) can end up
correctly BlockAcking incoming frames without delivering them to user
space if a AMPDU subframe got lost and we don't flush the receipients
reorder buffer with a BlockAckReq. This in turn results in stuck
connections.

According to 802.11n-2009 it is not necessary to send a BAR to flush
the recepients RX reorder buffer but we still do that to be polite.

However, assume the following frame exchange:

AP -> STA, AMPDU (failed)
AP -> STA, BAR (failed)

The client in question then ends up in the same situation and won't
deliver frames to userspace anymore since we weren't able to flush
its reorder buffer.

This is not a hypothetical situation but I was able to observe this
exact behavior during a stress test between a rt2800pci AP and a Intel
5100 Windows client.

In order to work around this issue just tear down the BA session as
soon as a BAR failed to be TX'ed.

[1] http://comments.gmane.org/gmane.linux.kernel.wireless.general/66867

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
 		2011-08-22 14:45:58 -04:00
..
Kconfig mac80211: remove the dependency on crypto_blkcipher 2011-04-04 16:20:00 -04:00
Makefile mac80211: add the minstrel_ht rate control algorithm 2010-06-02 16:12:59 -04:00
aes_ccm.c mac80211: use AES_BLOCK_SIZE 2011-07-08 11:11:24 -04:00
aes_ccm.h mac80211: use AES_BLOCK_SIZE 2011-07-08 11:11:24 -04:00
aes_cmac.c mac80211: use AES_BLOCK_SIZE 2011-07-08 11:11:24 -04:00
aes_cmac.h mac80211: fix CMAC races 2011-07-08 11:11:20 -04:00
agg-rx.c mac80211: check sta_info_get() return value 2011-07-20 15:04:36 -04:00
agg-tx.c wireless: Introduce defines for BAR TID_INFO & MULTI_TID fields 2011-08-22 14:45:58 -04:00
cfg.c mac80211: remove offchannel_tx API 2011-08-08 16:04:05 -04:00
cfg.h [MAC80211]: rename ieee80211_cfg.h to cfg.h 2007-10-10 16:52:34 -07:00
chan.c mac80211: fix channel type recalculation with HT and non-HT interfaces 2011-03-14 14:46:58 -04:00
debugfs.c mac80211: add basic support for WoWLAN 2011-05-05 14:59:20 -04:00
debugfs.h mac80211: refactor debugfs function generation code 2010-11-15 13:24:48 -05:00
debugfs_key.c mac80211: fix CMAC races 2011-07-08 11:11:20 -04:00
debugfs_key.h mac80211: support separate default keys 2010-12-13 15:23:29 -05:00
debugfs_netdev.c mac80211: fix SMPS debugfs locking 2011-04-20 16:05:59 -04:00
debugfs_netdev.h mac80211: reduce reliance on netdev 2009-12-21 18:38:52 -05:00
debugfs_sta.c mac80211: fix debugfs printk format warning 2011-04-19 15:38:03 -04:00
debugfs_sta.h mac80211: RCU-ify STA info structure access 2008-03-06 15:30:46 -05:00
driver-ops.h mac80211: remove offchannel_tx API 2011-08-08 16:04:05 -04:00
driver-trace.c mac80211: fix sparse warnings/errors 2009-08-04 16:43:25 -04:00
driver-trace.h mac80211: sync driver before TX 2011-07-20 15:04:35 -04:00
event.c cfg80211: use proper allocation flags 2009-07-10 15:01:49 -04:00
ht.c mac80211: Stop BA session event from device 2011-06-07 14:41:36 -04:00
ibss.c mac80211: fix IBSS teardown race 2011-06-08 14:19:05 -04:00
ieee80211_i.h cfg80211/mac80211: move information element parsing logic to cfg80211 2011-08-12 13:45:03 -04:00
iface.c net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared 2011-07-27 22:39:30 -07:00
key.c mac80211: let key iteration get keys in install order 2011-07-15 13:38:33 -04:00
key.h mac80211: allow driver to disconnect after resume 2011-07-13 14:49:43 -04:00
led.c mac80211: remove stray extern 2011-01-05 16:07:12 -05:00
led.h mac80211: selective throughput LED trigger active 2010-12-22 14:33:37 -05:00
main.c mac80211: Don't use a buf_size=0 in ADDBA requests 2011-08-08 16:04:09 -04:00
mesh.c mac80211: mesh: move some code to make it static 2011-05-12 14:10:55 -04:00
mesh.h mac80211: annotate and fix RCU in mesh code 2011-05-16 14:25:29 -04:00
mesh_hwmp.c mac80211: fix erroneous clearing of MESH_PATH_SN_VALID flag 2011-08-10 14:07:43 -04:00
mesh_pathtbl.c mac80211: fix smatch complains 2011-07-05 15:26:53 -04:00
mesh_plink.c nl80211: Move peer link state definition to nl80211 2011-05-16 14:10:49 -04:00
michael.c mac80211: remove ieee80211_get_hdr_info 2008-07-08 14:16:01 -04:00
michael.h mac80211: remove ieee80211_get_hdr_info 2008-07-08 14:16:01 -04:00
mlme.c mac80211: sync driver before TX 2011-07-20 15:04:35 -04:00
offchannel.c mac80211: Optimize scans on current operating channel. 2011-02-04 16:30:32 -05:00
pm.c mac80211: be more careful in suspend/resume 2011-07-15 13:39:42 -04:00
rate.c cfg80211/mac80211: improve ad-hoc multicast rate handling 2010-11-24 16:19:35 -05:00
rate.h mac80211: add the minstrel_ht rate control algorithm 2010-06-02 16:12:59 -04:00
rc80211_minstrel.c minstrel_ht: fixed rate mode through debugfs 2011-06-01 15:12:29 -04:00
rc80211_minstrel.h minstrel_ht: fixed rate mode through debugfs 2011-06-01 15:12:29 -04:00
rc80211_minstrel_debugfs.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
rc80211_minstrel_ht.c mac80211: Don't use EAPOL frames for rate sampling 2011-08-09 15:52:02 -04:00
rc80211_minstrel_ht.h minstrel_ht: move minstrel_mcs_groups declaration to header file 2010-06-24 15:42:18 -04:00
rc80211_minstrel_ht_debugfs.c mac80211: disallow seeks in minstrel debug code 2010-09-16 10:33:17 +02:00
rc80211_pid.h Fix common misspellings 2011-03-31 11:26:23 -03:00
rc80211_pid_algo.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
rc80211_pid_debugfs.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-10-23 11:47:02 -07:00
rx.c mac80211: allow driver to disconnect after resume 2011-07-13 14:49:43 -04:00
scan.c mac80211: implement scan supported rates 2011-07-19 16:50:00 -04:00
spectmgmt.c mac80211: reduce reliance on netdev 2009-12-21 18:38:52 -05:00
sta_info.c nl80211/cfg80211: Make addition of new sinfo fields safer 2011-08-11 14:23:06 -04:00
sta_info.h mac80211: simplify RX PN/IV handling 2011-07-08 11:42:21 -04:00
status.c mac80211: Tear down BA session on BAR tx failure 2011-08-22 14:45:58 -04:00
tkip.c mac80211: allow driver access to TKIP RX P1K 2011-07-15 13:38:32 -04:00
tkip.h mac80211: fix TKIP races, make API easier to use 2011-07-08 11:11:19 -04:00
tx.c mac80211: Fill in skb->protocol information for injected frames 2011-08-09 15:52:01 -04:00
util.c cfg80211/mac80211: move information element parsing logic to cfg80211 2011-08-12 13:45:03 -04:00
wep.c mac80211: remove the dependency on crypto_blkcipher 2011-04-04 16:20:00 -04:00
wep.h mac80211: remove the dependency on crypto_blkcipher 2011-04-04 16:20:00 -04:00
wme.c wireless: unify QoS control field definitions 2011-06-27 15:09:39 -04:00
wme.h wireless: unify QoS control field definitions 2011-06-27 15:09:39 -04:00
work.c mac80211: sync driver before TX 2011-07-20 15:04:35 -04:00
wpa.c mac80211: simplify RX PN/IV handling 2011-07-08 11:42:21 -04:00
wpa.h mac80211: 802.11w - Add BIP (AES-128-CMAC) 2009-01-29 16:00:02 -05:00