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* mac80211: allow driver to impose WoWLAN restrictionsJohannes Berg2011-07-051-6/+10
| | | | | | | | | | | If the driver can't support WoWLAN in the current state, this patch allows it to return 1 from the suspend callback to do the normal deconfiguration instead of using suspend/resume calls. Note that if it does this, resume won't be called. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: fix smatch complainsChristian Lamparter2011-07-052-3/+5
| | | | | | | | | | | | | mlme.c l.757 ieee80211_dynamic_ps_enable_work(11) variable dereferenced before check 'sdata' mesh_pathtbl.c l.650 mesh_path_del(20) double lock 'bottom_half' l.663 mesh_path_del(33) double unlock 'bottom_half' Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: Skip tailroom reservation for full HW-crypto devices with race fixYogesh Ashok Powar2011-07-053-11/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on inputs from Johannes Berg <johannes@sipsolutions.net> from http://article.gmane.org/gmane.linux.kernel.wireless.general/68193 and http://article.gmane.org/gmane.linux.kernel.wireless.general/71702 In xmit path, devices that do full hardware crypto (including MMIC and ICV) need no tailroom. For such devices, tailroom reservation can be skipped if all the keys are programmed into the hardware (i.e software crypto is not used for any of the keys) and none of the keys wants software to generate Michael MIC and IV. v2: Added check for IV along with MMIC. Reported-by: Fabio Rossi <rossi.f@inwind.it> Tested-by: Fabio Rossi <rossi.f@inwind.it> Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com> Cc: Mohammed Shafi Shajakhan <mshajakhan@atheros.com> v3: Fixing races to avoid WARNING: at net/mac80211/wpa.c:397 ccmp_encrypt_skb+0xc4/0x1f0 Reported-by: Andreas Hartmann <andihartmann@01019freenet.de> Tested-by: Andreas Hartmann <andihartmann@01019freenet.de> v4: Added links with message ID Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: propagate information about STA WME support downArik Nemtsov2011-06-291-1/+4
| | | | | | | | Add a memeber to the ieee80211_sta structure to indicate whether the STA supports WME. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Merge branch 'master' of ↵John W. Linville2011-06-281-1/+7
|\ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-tx.c
| * mac80211: fix rx->key NULL dereference during mic failureArik Nemtsov2011-06-271-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Sometimes when reporting a MIC failure rx->key may be unset. This code path is hit when receiving a packet meant for a multicast address, and decryption is performed in HW. Fortunately, the failing key_idx is not used for anything up to (and including) usermode, so we allow ourselves to drop it on the way up when a key cannot be retrieved. Signed-off-by: Arik Nemtsov <arik@wizery.com> Cc: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: dynamic PS - don't enter PS when TX frames are pendingArik Nemtsov2011-06-271-12/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the tx_frames_pending() driver callback to determine if Tx frames are pending for its internal queues. If so postpone the dynamic PS timeout to avoid interrupting Tx traffic. The commit e8306f989483e4b97a8b37dd268de6c8c6f35e75 enabled this behavior for drivers with IEEE80211_HW_PS_NULLFUNC_STACK. We enable this for all drivers supporting dynamic PS. This patch helps improve performance in noisy environments. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: Drop DS Channel PARAM in directed probePaul Stewart2011-06-275-11/+26
| | | | | | | | | | | | | | | | | | | | Do not send DS Channel parameter for directed probe requests in order to maximize the chance that we get a response. Some badly-behaved APs don't respond when this parameter is included. Signed-off-by: Paul Stewart <pstew@chromium.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: reestablish mis-configured existing Rx BA sessionsArik Nemtsov2011-06-271-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When forming a Rx BA session, sometimes the ADDBA response gets lost. This leads to a situation where the session is configured locally, but doesn't exist on the remote side. Subsequent ADDBA requests are declined by mac80211. Fix this by assuming the session state of the initiator is the correct one. When receiving an unexpected ADDBA request on a TID with an active Rx BA session, delete the existing one and establish a new session. Signed-off-by: Arik Nemtsov <arik@wizery.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: restrict advertised HW scan ratesJohannes Berg2011-06-271-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Advertise only user-requested bitrates in a HW scan. Note that the hw_scan API doesn't currently have a way of asking for a specific probe request bitrate, so we might end up using a bitrate that we don't advertise as supported. I'll fix that later. Also add a hexdump printk to hwsim to verify this. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | wireless: unify QoS control field definitionsJohannes Berg2011-06-273-8/+2Star
| | | | | | | | | | | | | | | | | | | | Move all that mac80211 has into the generic ieee80211.h header file and use them. At the same time move them from mask+shift to just bits and rename them for consistent names. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: quiesce vif before suspendingEliad Peller2011-06-201-16/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cancel all relevant timers/works before suspending (wowlan). This patch handles the following warning: WARNING: at net/mac80211/util.c:565 queueing ieee80211 work while going to suspend Backtrace: [<bf07b598>] (ieee80211_can_queue_work+0x0/0x4c [mac80211]) [<bf07c28c>] (ieee80211_queue_work+0x0/0x30 [mac80211]) [<bf0690dc>] (ieee80211_sta_timer+0x0/0x3c [mac80211]) [<c00a3008>] (run_timer_softirq+0x0/0x220) [<c009e530>] (__do_softirq+0x0/0x130) [<c009e660>] (irq_exit+0x0/0xb4) [<c004c4a0>] (ipi_timer+0x0/0x4c) [<c0046350>] (do_local_timer+0x0/0x88) [<c00488ec>] (cpu_idle+0x0/0xe0) [<c05294e8>] (rest_init+0x0/0xe0) [<c0008958>] (start_kernel+0x0/0x314) Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: add cancel_hw_scan() callbackEliad Peller2011-06-173-16/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When suspending, __ieee80211_suspend() calls ieee80211_scan_cancel(), which will only cancel sw scan. In order to cancel hw scan, the low-level driver has to cancel it in the suspend() callback. however, this is too late, as a new scan_work will be enqueued (while the driver is going into suspend). Add a new cancel_hw_scan() callback, asking the driver to cancel an active hw scan, and call it in ieee80211_scan_cancel(). Signed-off-by: Eliad Peller <eliad@wizery.com> Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: Start monitor work on restartPaul Stewart2011-06-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | Trigger connection monitor on resume from suspend. Since we have been sleeping, there is reason to suspect that we might not still be associated. The speed of detecting loss of {connection,authentication} is worth the cost of the small additional traffic at resume. Signed-off-by: Paul Stewart <pstew@chromium.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | networking: fix warning about unused label wake_upVincent Zweije2011-06-101-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Function ieee80211_reconfig in net/mac80211/util.c contains label wake_up which is defined unconditionally, but only used with CONFIG_PM. Gcc warns about this when CONFIG_PM is not defined. This patch makes the label's definition dependent on CONFIG_PM too, eliminating the warning. The issue was apparently introduced in git commit eecc48000afe2ca6da22122d553b7cad294e42fc. Signed-off-by: Vincent Zweije <vincent@zweije.nl> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: add ieee80211_get_operstate() functionEliad Peller2011-06-101-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | Add ieee80211_get_operstate() function to get the operstate of the netdevice. This is needed for drivers that need to know when the interface is IF_OPER_UP (e.g. wl12xx), and block notifiers can't be used (e.g. because the interface is already IF_OPER_UP, like after resuming from suspend) Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'master' of ↵John W. Linville2011-06-102-8/+4Star
|\| | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-agn-rxon.c drivers/net/wireless/rtlwifi/pci.c
| * mac80211: fix IBSS teardown raceJohannes Berg2011-06-081-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ignacy reports that sometimes after leaving an IBSS joining a new one didn't work because there still were stations on the list. He fixed it by flushing stations when attempting to join a new IBSS, but this shouldn't be happening in the first case. When I looked into it I saw a race condition in teardown that could cause stations to be added after flush, and thus cause this situation. Ignacy confirms that after applying my patch he hasn't seen this happen again. Reported-by: Ignacy Gawedzki <i@lri.fr> Debugged-by: Ignacy Gawedzki <i@lri.fr> Tested-by: Ignacy Gawedzki <i@lri.fr> Cc: stable@kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * Revert "mac80211: stop queues before rate control updation"John W. Linville2011-06-071-6/+0Star
| | | | | | | | | | | | | | | | | | | | This reverts commit 1d38c16ce4156f63b45abbd09dd28ca2ef5172b4. The mac80211 maintainer raised complaints about abuse of the CSA stop reason, and about whether this patch actually serves its intended purpose at all. Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: Stop BA session event from deviceShahar Levi2011-06-073-0/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some devices support BT/WLAN co-existence algorigthms. In order not to harm the system performance and user experience, the device requests not to allow any RX BA session and tear down existing RX BA sessions based on system constraints such as periodic BT activity that needs to limit WLAN activity (eg.SCO or A2DP). In such cases, the intention is to limit the duration of the RX PPDU and therefore prevent the peer device to use A-MPDU aggregation. Adding ieee80211_stop_rx_ba_session() callback that can be used by the driver to stop existing BA sessions. Signed-off-by: Shahar Levi <shahar_levi@ti.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'master' of ↵John W. Linville2011-06-074-23/+12Star
|\| | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
| * Revert "mac80211: Skip tailroom reservation for full HW-crypto devices"John W. Linville2011-06-063-23/+8Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit aac6af5534fade2b18682a0b9efad1a6c04c34c6. Conflicts: net/mac80211/key.c That commit has a race that causes a warning, as documented in the thread here: http://marc.info/?l=linux-wireless&m=130717684914101&w=2 Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: call dev_alloc_name before copying name to sdataThadeu Lima de Souza Cascardo2011-06-031-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This partially reverts 1c5cae815d19ffe02bdfda1260949ef2b1806171, because the netdev name is copied into sdata->name, which is used for debugging messages, for example. Otherwise, we get messages like this: wlan%d: authenticated Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Cc: Jiri Pirko <jpirko@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: "John W. Linville" <linville@tuxdriver.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | minstrel_ht: fixed rate mode through debugfsZefir Kurtisi2011-06-013-0/+28
| | | | | | | | | | | | | | | | | | Found several threads about fixed rate mode in minstrel_ht for test environments, but no patches for it. This patch provides such a mode through debugfs. Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | nl80211: add testmode dump supportWey-Yi Guy2011-06-011-0/+14
|/ | | | | | | | | | | | This adds dump support to testmode. The testmode dump support in nl80211 requires using two of the six cb->args, the rest can be used by the driver to figure out where the dump position is at or to store other data across invocations. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Merge ↵John W. Linville2011-05-272-1/+7
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
| * mac80211: Remove duplicate linux/slab.h include from net/mac80211/scan.cJesper Juhl2011-05-271-1/+0Star
| | | | | | | | | | | | | | | | | | Commit 79f460ca49d8d5700756ab7071c951311c7f29cc add a duplicate linux/slab.h include to net/mac80211/scan.c - remove it. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Acked-by: Luciano Coelho <coelho@ti.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: clear local->ps_data on disassocEliad Peller2011-05-271-0/+1
| | | | | | | | | | | | | | | | | | local->ps_data wasn't cleared on disassociation, which (in some corner cases) caused reconnections to enter psm before association completed. Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: stop queues before rate control updationRajkumar Manoharan2011-05-261-0/+6
| | | | | | | | | | | | | | | | | | Stop tx queues before updating rate control to ensure proper rate selection. Otherwise packets can be transmitted in 40 Mhz whereas hw is configured in HT20. Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge ↵John W. Linville2011-05-245-85/+157
|\| | | | | | | ssh://master.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
| * mac80211: Don't sleep when growing the mesh pathJavier Cardona2011-05-191-3/+3
| | | | | | | | | | | | | | | | | | | | After commit 1928ecab620907a0953f811316d05f367f3f4dba (mac80211: fix and simplify mesh locking) mesh table allocation is performed with the pathtbl_resize_lock taken. Under those conditions one should not sleep. This patch makes the allocations GFP_ATOMIC to prevent that. Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: annotate and fix RCU in mesh codeJohannes Berg2011-05-162-56/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds proper RCU annotations to the mesh path table code, and fixes a number of bugs in the code that I found while checking the sparse warnings I got as a result of the annotations. Some things like the changes in mesh_path_add() or mesh_pathtbl_init() only serve to shut up sparse, but other changes like the changes surrounding the for_each_mesh_entry() macro fix real RCU bugs in the code. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: fix and simplify mesh lockingJohannes Berg2011-05-162-22/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The locking in mesh_{mpath,mpp}_table_grow not only has an rcu_read_unlock() missing, it's also racy (though really only technically since it's invoked from a single function only) since it obtains the new size of the table without any locking, so two invocations of the function could attempt the same resize. Additionally, it uses synchronize_rcu() which is rather expensive and can be avoided trivially here. Modify the functions to only use the table lock and use call_rcu() instead of synchronize_rcu(). Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: add missing rcu_barrierJohannes Berg2011-05-161-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | mac80211 uses call_rcu() with functions that are defined in the module, so it must use rcu_barrier() at module exit time. Luckily, this seems to not be a problem in practice as module unload and unregistration takes a long time and probably does multiple synchronize_rcu(). Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: abort scan_work immediately when the device goes downRajkumar Manoharan2011-05-162-2/+7
| | | | | | | | | | | | | | | | | | | | | | As long as no delay is required b/w channel change, scan work is proceeding without scheduling a new work. In such case, we can not abort scan work when the card was unplugged. This patch completes the scanning immediately whenever the device goes down. Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: verify IBSS in interface combinationsJohannes Berg2011-05-161-3/+17
| | | | | | | | | | | | | | | | | | | | Drivers shouldn't attempt to advertise support for more than one IBSS interface since mac80211 doesn't support that. Check and return an error from ieee80211_register_hw() in that case. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: Deactivate mesh path timers when freeing nodesJavier Cardona2011-05-161-1/+3
| | | | | | | | | | | | | | | | | | | | | | Mesh paths are deleted via mesh_path_del() which properly deactivates the timer associated to a mesh path. But if paths were deleted by mesh_table_free(..., true) timers would not be deactivated. This fixes this case. Reported-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds2011-05-2039-690/+1301
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
| * \ Merge branch 'master' of ↵David S. Miller2011-05-171-0/+4
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/vmxnet3/vmxnet3_ethtool.c net/core/dev.c
| * \ \ Merge branch 'master' of ↵John W. Linville2011-05-1729-422/+835
| |\ \ \ | | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem Conflicts: drivers/net/wireless/iwlwifi/iwl-agn-tx.c net/mac80211/sta_info.h
| | * | cfg80211: make stripping of 802.11 header optional from AMSDUYogesh Ashok Powar2011-05-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the devices that have already stripped IEEE 802.11 header from the AMSDU SKB can not use ieee80211_amsdu_to_8023s routine. This patch enhances ieee80211_amsdu_to_8023s() API by changing mandatory removing of IEEE 802.11 header from AMSDU to optional. Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | nl80211: Move peer link state definition to nl80211Javier Cardona2011-05-165-44/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These definitions need to be exposed now that we can set the peer link states via NL80211_ATTR_STA_PLINK_STATE. They were already being (opaquely) reported by NL80211_STA_INFO_PLINK_STATE. Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | mac80211: sparse RCU annotationsJohannes Berg2011-05-1616-74/+118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds sparse RCU annotations to most of mac80211, only the mesh code remains to be done. Due the the previous patches, the annotations are pretty simple. The only thing that this actually changes is removing the RCU usage of key->sta in debugfs since this pointer isn't actually an RCU-managed pointer (it only has a single assignment done before the key even goes live). As that is otherwise harmless, I decided to make it part of this patch. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | mac80211: fix TX a-MPDU lockingJohannes Berg2011-05-163-12/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During my quest to make mac80211 not have any RCU warnings from sparse, I came across the a-MPDU code again and it wasn't quite clear why it isn't racy. So instead of assigning the tid_tx array with just the spinlock held in ieee80211_start_tx_ba_session use a separate temporary array protected only by the spinlock and protect all assignments to the "live" array by both the spinlock and the mutex so that other code is easily verified to be correct. Due to pointer assignment atomicity I don't think this is a real issue, but I'm not sure, especially on Alpha the current code might be problematic. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | cfg80211: advertise possible interface combinationsJohannes Berg2011-05-161-4/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the ability to advertise interface combinations in nl80211. This allows the driver to indicate what the combinations are that it supports. "Combinations" of just a single interface are implicit, as previously. Note that cfg80211 will enforce that the restrictions are met, but not for all drivers yet (once all drivers are updated, we can remove the flag and enforce for all). When no combinations are actually supported, an empty list will be exported so that userspace can know if the kernel exported this info or not (although it isn't clear to me what tools using the info should do if the kernel didn't export it). Since some interface types are purely virtual/software and don't fit the restrictions, those are exposed in a new list of pure SW types, not subject to restrictions. This mainly exists to handle AP-VLAN and monitor interfaces in mac80211. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | mac80211: mesh: move some code to make it staticJohannes Berg2011-05-123-54/+53Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's no need to have table functions in one file and all users in another, move the functions to the right file and make them static. Also move a static variable to the beginning of the file to make it easier to find. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | cfg80211/mac80211: avoid bounce back mac->cfg->mac on sched_scan_stoppedLuciano Coelho2011-05-124-11/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When sched_scan_stopped was called by the driver, mac80211 calls cfg80211, which in turn was calling mac80211 back with a flag "driver_initiated". This flag was used so that mac80211 would do the necessary cleanup but would not call the driver. This was enough to prevent the bounce back between the driver and mac80211, but not between mac80211 and cfg80211. To fix this, we now do the cleanup in mac80211 before calling cfg80211. To help with locking issues, the workqueue was moved from cfg80211 to mac80211. Reported-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Luciano Coelho <coelho@ti.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | mac80211: fix a few RCU issuesJohannes Berg2011-05-121-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A few configuration functions correctly do rcu_read_lock() but don't correctly reference some pointers protected by RCU. Fix that. Cc: stable@kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | mac80211: fix another key non-raceJohannes Berg2011-05-121-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code here is only not racy because all the places that assign the pointers it uses are holding the sta_mtx as well as the key_mtx and so can't race against this because this code holds the sta_mtx. But that's not intuitive, so fix it to hold the key_mtx. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | mac80211: make key locking clearerJohannes Berg2011-05-123-27/+20Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code in ieee80211_del_key() doesn't acquire the key_mtx properly when it dereferences the keys. It turns out that isn't actually necessary since the key_mtx itself seems to be redundant since all key manipulations are done under the RTNL, but as long as we have the key_mtx we should use it the right way too. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-12 10:06:25 +0200