linux.git/net/mac80211/scan.c, branch v3.13

mac80211: fix scheduled scan rtnl deadlock

2013-11-25T15:50:04+00:00

When changing cfg80211 to use RTNL locking, this caused a
deadlock in mac80211 as it calls cfg80211_sched_scan_stopped()
from a work item that's on a workqueue that is flushed with
the RTNL held.

Fix this by simply using schedule_work(), the work only needs
to finish running before the wiphy is unregistered, no other
synchronisation (e.g. with suspend) is really required since
for suspend userspace is already blocked anyway when we flush
the workqueue so will only pick up the event after resume.

Cc: stable@vger.kernel.org
Fixes: 5fe231e87372 ("cfg80211: vastly simplify locking")
Reported-and-tested-by: Eliad Peller 
Signed-off-by: Johannes Berg

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2013-10-23T20:49:34+00:00

Conflicts:
	drivers/net/usb/qmi_wwan.c
	include/net/dst.h

Trivial merge conflicts, both were overlapping changes.

Signed-off-by: David S. Miller

mac80211: correctly close cancelled scans

2013-10-09T16:40:07+00:00

__ieee80211_scan_completed is called from a worker. This
means that the following flow is possible.

 * driver calls ieee80211_scan_completed
 * mac80211 cancels the scan (that is already complete)
 * __ieee80211_scan_completed runs

When scan_work will finally run, it will see that the scan
hasn't been aborted and might even trigger another scan on
another band. This leads to a situation where cfg80211's
scan is not done and no further scan can be issued.

Fix this by setting a new flag when a HW scan is being
cancelled so that no other scan will be triggered.

Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg

mac80211: change beacon/connection polling

2013-09-26T11:27:11+00:00

Since when we detect beacon lost we do active AP probing (using nullfunc
frame or probe request) there is no need to have beacon polling. Flags
IEEE80211_STA_BEACON_POLL seems to be used just for historical reasons.

Change also make that after we start connection poll due to beacon loss,
next received beacon will abort the poll.

Signed-off-by: Stanislaw Gruszka 
Signed-off-by: Johannes Berg

mac80211: allow scanning for 5/10 MHz channels in IBSS

2013-07-16T06:58:09+00:00

Use a chandef instead of just the channel for scanning, and enable
5/10 Mhz scanning for IBSS mode. Also reporting is changed to the new
inform_bss functions.

Signed-off-by: Simon Wunderlich 
Signed-off-by: Mathias Kretschmer 
Signed-off-by: Johannes Berg

mac80211: select and adjust bitrates according to channel mode

2013-07-16T06:58:06+00:00

The various components accessing the bitrates table must use consider
the used channel bandwidth to select only available rates or calculate
the bitrate correctly.

There are some rates in reduced bandwidth modes which can't be
represented as multiples of 500kbps, like 2.25 MBit/s in 5 MHz mode. The
standard suggests to round up to the next multiple of 500kbps, just do
that in mac80211 as well.

Signed-off-by: Simon Wunderlich 
Signed-off-by: Mathias Kretschmer 
[make rate unsigned in ieee80211_add_tx_radiotap_header(), squash fix]
Signed-off-by: Johannes Berg

mac80211: track AP's beacon rate and give it to the driver

2013-06-13T09:58:47+00:00

Track the AP's beacon rate in the scan BSS data and in the
interface configuration to let the drivers know which rate
the AP is using. This information may be used by drivers,
in our case to let the firmware optimise beacon RX.

Signed-off-by: Alexander Bondar 
Signed-off-by: Johannes Berg

mac80211: parse VHT channel switch IEs

2013-04-16T13:29:45+00:00

VHT introduces multiple IEs that need to be parsed for a
wide bandwidth channel switch. Two are (currently) needed
in mac80211:
 * wide bandwidth channel switch element
 * channel switch wrapper element

The former is contained in the latter for beacons and probe
responses, but not for the spectrum management action frames
so the IE parser needs a new argument to differentiate them.

Signed-off-by: Johannes Berg

mac80211: check ERP info IE length in parser

2013-04-08T07:16:57+00:00

It's always just one byte, so check for that and
remove the length field from the parser struct.

Signed-off-by: Johannes Berg

mac80211: Use a cfg80211_chan_def in ieee80211_hw_conf_chan

2013-03-25T18:19:35+00:00

Drivers that don't use chanctxes cannot perform VHT association because
they still use a "backward compatibility" pair of {ieee80211_channel,
nl80211_channel_type} in ieee80211_conf and ieee80211_local.

Signed-off-by: Karl Beldan 
[fix kernel-doc]
Signed-off-by: Johannes Berg