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authorJohannes Berg <johannes.berg@intel.com>2010-06-10 10:21:29 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-06-14 15:38:16 -0400
commit2a419056c15478d2df3f3e9d4fa64e34eb1faa7d (patch)
tree680342d6b883c18eec9003f2b93abd8ffd1e6ae6 /net/mac80211/agg-tx.c
parent9d38d85de0270e3927bffab94973a9c78d1dc800 (diff)
mac80211: simplify station/aggregation code
A number of places use RCU locking for accessing the station list, even though they do not need to. Use mutex locking instead to prepare for the locking changes I want to make. The mlme code is also using a WLAN_STA_DISASSOC flag that has the same meaning as WLAN_STA_BLOCK_BA, so use that. While doing so, combine places where we loop over stations twice, and optimise away some of the loops by checking if the hardware supports aggregation at all first. Also fix a more theoretical race condition: right now we could resume, set up an aggregation session, and right after tear it down again due to the code that is needed for hardware reconfiguration here. Also mark add a comment to that code marking it as a workaround. Finally, remove a pointless aggregation disabling loop when an interface is stopped, directly after that we remove all stations from it which will also disable all aggregation sessions that may still be active, and does so in a race-free way unlike the current loop that doesn't block new sessions. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/agg-tx.c')
-rw-r--r--net/mac80211/agg-tx.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index d1b6664a253..9b9f21be0ff 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -239,17 +239,9 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
sdata->vif.type != NL80211_IFTYPE_AP)
return -EINVAL;
- if (test_sta_flags(sta, WLAN_STA_DISASSOC)) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "Disassociation is in progress. "
- "Denying BA session request\n");
-#endif
- return -EINVAL;
- }
-
if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "Suspend in progress. "
+ printk(KERN_DEBUG "BA sessions blocked. "
"Denying BA session request\n");
#endif
return -EINVAL;