linux.git/drivers/net/wireless/rt2x00/rt2x00queue.c, branch master

rt2x00: move under ralink vendor directory

2015-11-18T12:28:31+00:00

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo

rt2x00: use helper to check capability/requirement

2015-01-07T08:41:42+00:00

Use rt2x00_has_cap_flag macro to check rt2x00dev->cap_flags.

Signed-off-by: Fred Chou 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo

rt2x00: do not align payload on modern H/W

2014-11-11T21:12:44+00:00

RT2800 and newer hardware require padding between header and payload if
header length is not multiple of 4.

For historical reasons we also align payload to to 4 bytes boundary, but
such alignment is not needed on modern H/W.

Patch fixes skb_under_panic problems reported from time to time:

https://bugzilla.kernel.org/show_bug.cgi?id=84911
https://bugzilla.kernel.org/show_bug.cgi?id=72471
http://marc.info/?l=linux-wireless&m=139108549530402&w=2
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087591

Panic happened because we eat 4 bytes of skb headroom on each
(re)transmission when sending frame without the payload and the header
length not being multiple of 4 (i.e. QoS header has 26 bytes). On such
case because paylad_aling=2 is bigger than header_align=0 we increase
header_align by 4 bytes. To prevent that we could change the check to:

	if (payload_length && payload_align > header_align)
		header_align += 4;

but not aligning payload at all is more effective and alignment is not
really needed by H/W (that has been tested on OpenWrt project for few
years now).

Reported-and-tested-by: Antti S. Lankila 
Debugged-by: Antti S. Lankila 
Reported-by: Henrik Asp 
Originally-From: Helmut Schaa 
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka 
Signed-off-by: John W. Linville

rt2x00: change beaconing locking

2014-06-19T19:49:14+00:00

This patch is needed for further changes to keep global variables
consistent when changing beaconing on diffrent vif's.

Signed-off-by: Stanislaw Gruszka 
Signed-off-by: John W. Linville

rt2x00: Fix FSF address in file headers

2013-12-11T15:56:19+00:00

Several files refer to an old address for the Free Software Foundation
in the file header comment.  Resolve by replacing the address with
the URL  so that we do not have to keep
updating the header comments anytime the address changes.

CC: linux-wireless@vger.kernel.org
CC: Ivo van Doorn 
CC: Gertjan van Wingerde 
CC: Helmut Schaa 
Signed-off-by: Jeff Kirsher 
Acked-by: Gertjan van Wingerde 
Signed-off-by: John W. Linville

rt2x00: fix HT TX descriptor settings regression

2013-11-11T19:38:59+00:00

Since:

commit 36323f817af0376c78612cfdab714b0feb05fea5
Author: Thomas Huehn 
Date:   Mon Jul 23 21:33:42 2012 +0200

    mac80211: move TX station pointer and restructure TX

we do not pass sta pointer to rt2x00queue_create_tx_descriptor_ht(),
hence we do not correctly set station WCID and AMPDU density parameters.

Cc: stable@vger.kernel.org # 3.7+
Signed-off-by: Stanislaw Gruszka 
Acked-by: Gertjan van Wingerde 
Signed-off-by: John W. Linville

rt2x00: rt2x00lib: use rt2x00_has_cap_* helpers

2013-10-14T17:39:57+00:00

Use the appropriate helper functions instead of
directly accessing the rt2x00dev->cap_flags field
to check device capability flags.

This improves readability of the code a bit.

Signed-off-by: Gabor Juhos 
Signed-off-by: John W. Linville

rt2x00: do not pause queue on flush

2013-10-10T17:49:28+00:00

Pausing queue on flush make no sense since txdone procedure un-pause
queue. Before flush procedure we have to assure queue is stopped,
i.e. on receive path h/w RX is disabled, on transmit path queue is
disabled in mac80211. That conditions are true except one function:
rt2x00usb_watchdog_tx_dma(), so add stop/start queue there.

Note stop/start queue can be racy if we do this from multiple paths,
but currently we stop TX queues only on rt2x00lib_disable_radio(),
which also stop/sync watchdog, hance we have no race condition.

Signed-off-by: Stanislaw Gruszka 
Signed-off-by: John W. Linville

net: wireless: rt2x00: Staticize rt2x00queue_pause_queue_nocheck()

2013-08-09T19:57:55+00:00

rt2x00queue_pause_queue_nocheck()is used only in this file.
Fix the following sparse warning:

drivers/net/wireless/rt2x00/rt2x00queue.c:939:6: warning: symbol 'rt2x00queue_pause_queue_nocheck' was not declared. Should it be
static?

Signed-off-by: Jingoo Han 
Acked-by: Gertjan van Wingerde 
Signed-off-by: John W. Linville

rt2x00: fix stop queue

2013-07-29T18:39:44+00:00

Since we clear QUEUE_STARTED in rt2x00queue_stop_queue(), following
call to rt2x00queue_pause_queue() reduce to noop, i.e we do not
stop queue in mac80211.

To fix that introduce rt2x00queue_pause_queue_nocheck() function,
which will stop queue in mac80211 directly.

Note that rt2x00_start_queue() explicitly set QUEUE_PAUSED bit.

Note also that reordering operations i.e. first call to
rt2x00queue_pause_queue() and then clear QUEUE_STARTED bit, will race
with rt2x00queue_unpause_queue(), so calling ieee80211_stop_queue()
directly is the only available solution to fix the problem without
major rework.

Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka 
Signed-off-by: John W. Linville