linux-toradex.git/net/mac80211, branch v2.6.32.4

mac80211: fix skb buffering issue (and fixes to that)

2010-01-18T18:19:49+00:00

This is a backport of the mainline patches

 cf0277e714a0db302a8f80e1b85fd61c32cf00b3
 045cfb71a3901005bf6dcedae98cecb3360a0bfc
 b49bb574e44226b332c28439999d196ddec2f643

Here is the description of the first of
those patches (the other two just fixed
bugs added by that patch):

Since I removed the master netdev, we've been
keeping internal queues only, and even before
that we never told the networking stack above
the virtual interfaces about congestion. This
means that packets are queued in mac80211 and
the upper layers never know, possibly leading
to memory exhaustion and other problems.

This patch makes all interfaces multiqueue and
uses ndo_select_queue to put the packets into
queues per AC. Additionally, when the driver
stops a queue, we now stop all corresponding
queues for the virtual interfaces as well.

The injection case will use VO by default for
non-data frames, and BE for data frames, but
downgrade any data frames according to ACM. It
needs to be fleshed out in the future to allow
chosing the queue/AC in radiotap.

Signed-off-by: Johannes Berg 
Cc: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

mac80211: add missing sanity checks for action frames

2010-01-18T18:19:47+00:00

commit d79074488083ec0d7ecd15352192dc1631f25643 upstream.

Various missing sanity checks caused rejected action frames to be
interpreted as channel switch announcements, which can cause a client
mode interface to switch away from its operating channel, thereby losing
connectivity. This patch ensures that only spectrum management action
frames are processed by the CSA handling function and prevents rejected
action frames from getting processed by the MLME code.

Signed-off-by: Felix Fietkau 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

mac80211: fix race with suspend and dynamic_ps_disable_work

2010-01-06T23:04:28+00:00

commit b98c06b6debfe84c90200143bb1102f312f50a33 upstream.

When mac80211 suspends it calls a driver's suspend callback
as a last step and after that the driver assumes no calls will
be made to it until we resume and its start callback is kicked.
If such calls are made, however, suspend can end up throwing
hardware in an unexpected state and making the device unusable
upon resume.

Fix this by preventing mac80211 to schedule dynamic_ps_disable_work
by checking for when mac80211 starts to suspend and starts
quiescing. Frames should be allowed to go through though as
that is part of the quiescing steps and we do not flush the
mac80211 workqueue since it was already done towards the
beginning of suspend cycle.

The other mac80211 issue will be hanled in the next patch.

For further details see refer to the thread:

http://marc.info/?t=126144866100001&r=1&w=2

Cc: stable@kernel.org
Signed-off-by: Luis R. Rodriguez 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

mac80211: Fix IBSS merge

2010-01-06T23:04:08+00:00

commit 450aae3d7b60a970f266349a837dfb30a539198b upstream.

Currently, in IBSS mode, a single creator would go into
a loop trying to merge/scan. This happens because the IBSS timer is
rearmed on finishing a scan and the subsequent
timer invocation requests another scan immediately.

This patch fixes this issue by checking if we have just completed
a scan run trying to merge with other IBSS networks.

Signed-off-by: Sujith 
Signed-off-by: John W. Linville 
Cc: Luis Rodriguez 
Signed-off-by: Greg Kroah-Hartman

mac80211: fix WMM AP settings application

2010-01-06T23:04:06+00:00

commit 0183826b58a2712ffe608bc3302447be3e6a3ab8 upstream.

My
  commit 77fdaa12cea26c204cc12c312fe40bc0f3dcdfd8
  Author: Johannes Berg 
  Date:   Tue Jul 7 03:45:17 2009 +0200

      mac80211: rework MLME for multiple authentications

inadvertedly broke WMM because it removed, along with
a bunch of other now useless initialisations, the line
initialising sdata->u.mgd.wmm_last_param_set to -1
which would make it adopt any WMM parameter set. If,
as is usually the case, the AP uses WMM parameter set
sequence number zero, we'd never update it until the
AP changes the sequence number.

Add the missing initialisation back to get the WMM
settings from the AP applied locally.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

mac80211: fix propagation of failed hardware reconfigurations

2010-01-06T23:04:04+00:00

commit 24feda0084722189468a65e20019cdd8ef99702b upstream.

mac80211 does not propagate failed hardware reconfiguration
requests. For suspend and resume this is important due to all
the possible issues that can come out of the suspend <-> resume
cycle. Not propagating the error means cfg80211 will assume
the resume for the device went through fine and mac80211 will
continue on trying to poke at the hardware, enable timers,
queue work, and so on for a device which is completley
unfunctional.

The least we can do is to propagate device start issues and
warn when this occurs upon resume. A side effect of this patch
is we also now propagate the start errors upon harware
reconfigurations (non-suspend), but this should also be desirable
anyway, there is not point in continuing to reconfigure a
device if mac80211 was unable to start the device.

For further details refer to the thread:

http://marc.info/?t=126151038700001&r=1&w=2

Signed-off-by: Luis R. Rodriguez 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

mac80211: Fix dynamic power save for scanning.

2009-12-18T22:05:24+00:00

Upstream commit: 7c3f4bbedc241ddcd3abe1f419c356e625231da1

Not only ps_sdata but also IEEE80211_CONF_PS is to be considered
before restoring PS in scan_ps_disable(). For instance, when ps_sdata
is set but CONF_PS is not set just because the dynamic timer is still
running, a sw scan leads to setting of CONF_PS in scan_ps_disable
instead of restarting the dynamic PS timer.
Also for the above case, a null data frame is to be sent after
returning to operating channel which was not happening with the
current implementation. This patch fixes this too.


Signed-off-by: Vivek Natarajan 
Reviewed-by: Kalle Valo 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

wireless: correctly report signal value for IEEE80211_HW_SIGNAL_UNSPEC

2009-12-18T22:04:25+00:00

commit 19deffbeba930030cfaf000b920333c6ba99ad52 upstream.

This part was missed in "cfg80211: implement get_wireless_stats",
probably because sta_set_sinfo already existed and was only handling
dBm signals.

Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

mac80211: fix scan abort sanity checks

2009-12-18T22:04:24+00:00

commit 6d3560d4fc9c5b9fe1a07a63926ea70512c69c32 upstream.

Since sometimes mac80211 queues up a scan request
to only act on it later, it must be allowed to
(internally) cancel a not-yet-running scan, e.g.
when the interface is taken down. This condition
was missing since we always checked only the
local->scanning variable which isn't yet set in
that situation.

Reported-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

mac80211: Revert 'Use correct sign for mesh active path refresh'

2009-12-18T22:04:23+00:00

commit 7b324d28a94dac5a451e8cba66e8d324601e5b9a upstream.

The patch ("mac80211: Use correct sign for mesh active path
refresh.") was actually a bug.  Reverted it and improved the
explanation of how mesh path refresh works.

Signed-off-by: Javier Cardona 
Signed-off-by: Andrey Yurovsky 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman