linux-kernel - [243/264] mac80211: fix remain_off

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Date:	Wed, 09 Nov 2011 13:34:50 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Eliad Peller <eliad@...ery.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [243/264] mac80211: fix remain_off_channel regression

3.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eliad Peller <eliad@...ery.com>

commit eaa7af2ae582c9a8c51b374c48d5970b748a5ce2 upstream.

The offchannel code is currently broken - we should
remain_off_channel if the work was started, and
the work's channel and channel_type are the same
as local->tmp_channel and local->tmp_channel_type.

However, if wk->chan_type and local->tmp_channel_type
coexist (e.g. have the same channel type), we won't
remain_off_channel.

This behavior was introduced by commit da2fd1f
("mac80211: Allow work items to use existing
channel type.")

Tested-by: Ben Greear <greearb@...delatech.com>
Signed-off-by: Eliad Peller <eliad@...ery.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 net/mac80211/work.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/mac80211/work.c
+++ b/net/mac80211/work.c
@@ -1086,8 +1086,8 @@ static void ieee80211_work_work(struct w
 			continue;
 		if (wk->chan != local->tmp_channel)
 			continue;
-		if (ieee80211_work_ct_coexists(wk->chan_type,
-					       local->tmp_channel_type))
+		if (!ieee80211_work_ct_coexists(wk->chan_type,
+						local->tmp_channel_type))
 			continue;
 		remain_off_channel = true;
 	}

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