linux-toradex.git/net/mac80211/pm.c, branch v3.2.62

mac80211: optimise station flags

2011-09-30T19:57:19+00:00

The flaglock in struct sta_info has long been
something that I wanted to get rid of, this
finally does the conversion to atomic bitops.

The conversion itself is straight-forward in
most places, a few things needed to change a
bit since we can no longer use multiple bits
at the same time.

On x86-64, this is a fairly significant code
size reduction:
   text	   data	    bss	    dec	    hex
 427861	  23648	   1008	 452517	  6e7a5	before
 425383	  23648	    976	 450007	  6ddd7	after

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: be more careful in suspend/resume

2011-07-15T17:39:42+00:00

When suspending with all netdevs down, the device
is stopped but we still call a number of driver
callbacks that the driver might not expect. The
same happens during resume, we might call a few
callbacks without starting the driver. Fix this
by checking open_count around more things and
exiting quickly if it is 0.

Also, while at this I noticed that the coverage
class isn't reprogrammed after resume, so add
that.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: allow driver to impose WoWLAN restrictions

2011-07-05T19:26:56+00:00

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 
Signed-off-by: John W. Linville

mac80211: quiesce vif before suspending

2011-06-20T19:34:18+00:00

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:
[] (ieee80211_can_queue_work+0x0/0x4c [mac80211])
[] (ieee80211_queue_work+0x0/0x30 [mac80211])
[] (ieee80211_sta_timer+0x0/0x3c [mac80211])
[] (run_timer_softirq+0x0/0x220)
[] (__do_softirq+0x0/0x130)
[] (irq_exit+0x0/0xb4)
[] (ipi_timer+0x0/0x4c)
[] (do_local_timer+0x0/0x88)
[] (cpu_idle+0x0/0xe0)
[] (rest_init+0x0/0xe0)
[] (start_kernel+0x0/0x314)

Signed-off-by: Eliad Peller 
Signed-off-by: John W. Linville

mac80211: add basic support for WoWLAN

2011-05-05T18:59:20+00:00

This adds basic support for the new WoWLAN
configuration in mac80211. The behaviour is
completely offloaded to the driver though,
with two new callbacks (suspend/resume).

Options for the driver include a complete
reconfiguration after wakeup, and exposing
all the triggers it wants to support.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: tear down BA sessions properly on suspend

2011-04-25T18:50:16+00:00

Currently, the code to tear down BA sessions will
execute after queues are stopped, but attempt to
send frames, so those frames will just get queued,
which isn't intended. Move this code to before to
tear down the sessions properly.

Additionally, after stopping queues, flush the TX
queues in the driver driver to make sure all the
frames went out.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: assure we also cancel deferred scan request

2010-10-06T20:30:42+00:00

This is partial revert and fix for commit
85f72bc839705294b32b6c16b491c0422f0a71b3 "mac80211: only cancel
software-based scans on suspend"

When cfg80211 request the scan and mac80211 perform some management work,
we defer the scan request. We do not canceling such requests when calling
ieee80211_scan_cancel(), because of SCAN_SW_SCANNING bit check just
before the call. So fix that problem.

Another problem, which commit 85f72bc839705294b32b6c16b491c0422f0a71b3
tries to solve, is we can not cancel HW scan. Hence patch make
ieee80211_scan_cancel() ignore HW scan (see code comments). Keeping
local->mtx lock assures that the deferred scan will not become
"working" HW scan.

Signed-off-by: Stanislaw Gruszka 
Acked-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: avoid transmitting delBA to old AP

2010-10-06T20:30:40+00:00

When roaming while we have active BA session,
we can end up transmitting delBA frames to
the old AP while we're already on the new AP's
channel, which can cause warnings.

Simply avoid sending those frames, but still
tear down the internal session state, since
they are not really necessary anyway as we
will implicitly disassociate when sending the
association to the new AP.

Signed-off-by: Johannes Berg 
Acked-by: Luis R. Rodriguez 
Signed-off-by: John W. Linville

mac80211: only cancel software-based scans on suspend

2010-09-01T20:12:28+00:00

Otherwise the hardware scan handler could access an invalid scan request
structure.  The driver should cancel any pending hardware scans during
the suspend process anyway, so also add a warning if the hardware scan
is still pending when the device resumes.

Signed-off-by: John W. Linville

mac80211: use common work struct

2010-06-14T19:38:17+00:00

IBSS, managed and mesh modes all have their
own work struct, and in the future we want
to also use it in other modes to process
frames from the now common skb queue.

This also makes the skb queue and work safe
to use from other interface types.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville