linux-kernel - [021/139] mac80211: fix PREQ processing and one small bug

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Date:	Thu, 22 Apr 2010 12:53:18 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Marco Porsch <marco.porsch@...mens.com>,
	Javier Cardona <javier@...ybit.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [021/139] mac80211: fix PREQ processing and one small bug

2.6.33-stable review patch.  If anyone has any objections, please let us know.

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

From: Porsch, Marco <marco.porsch@...mens.com>

commit 533866b12cce484994163b1e201778cbac4c04c5 upstream.

1st) a PREQ should only be processed, if it has the same SN and better
metric (instead of better or equal).
2nd) next_hop[ETH_ALEN] now actually used to buffer
mpath->next_hop->sta.addr for use out of lock.

Signed-off-by: Marco Porsch <marco.porsch@...mens.com>
Acked-by: Javier Cardona <javier@...ybit.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

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

--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -391,7 +391,7 @@ static u32 hwmp_route_info_get(struct ie
 				if (SN_GT(mpath->sn, orig_sn) ||
 				    (mpath->sn == orig_sn &&
 				     action == MPATH_PREQ &&
-				     new_metric > mpath->metric)) {
+				     new_metric >= mpath->metric)) {
 					process = false;
 					fresh_info = false;
 				}
@@ -611,7 +611,7 @@ static void hwmp_prep_frame_process(stru
 
 	mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr,
 		cpu_to_le32(orig_sn), 0, target_addr,
-		cpu_to_le32(target_sn), mpath->next_hop->sta.addr, hopcount,
+		cpu_to_le32(target_sn), next_hop, hopcount,
 		ttl, cpu_to_le32(lifetime), cpu_to_le32(metric),
 		0, sdata);
 	rcu_read_unlock();


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