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authorJohannes Berg <johannes@sipsolutions.net>2009-03-23 17:28:41 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-03-27 20:13:22 -0400
commitcd8ffc800ce18e558335c4946b2217864fc16045 (patch)
treee9bb8c3d6011e89374f9df353ff1f15d45a63590 /net/mac80211/ieee80211_i.h
parenta220858d30604902f650074bfac5a7598bc97ea4 (diff)
mac80211: fix aggregation to not require queue stop
Instead of stopping the entire AC queue when enabling aggregation (which was only done for hardware with aggregation queues) buffer the packets for each station, and release them to the pending skb queue once aggregation is turned on successfully. We get a little more code, but it becomes conceptually simpler and we can remove the entire virtual queue mechanism from mac80211 in a follow-up patch. This changes how mac80211 behaves towards drivers that support aggregation but have no hardware queues -- those drivers will now not be handed packets while the aggregation session is being established, but only after it has been fully established. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/ieee80211_i.h')
-rw-r--r--net/mac80211/ieee80211_i.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 6ce62e553dc..32345b479ad 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -639,6 +639,14 @@ struct ieee80211_local {
struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
struct tasklet_struct tx_pending_tasklet;
+ /*
+ * This lock is used to prevent concurrent A-MPDU
+ * session start/stop processing, this thus also
+ * synchronises the ->ampdu_action() callback to
+ * drivers and limits it to one at a time.
+ */
+ spinlock_t ampdu_lock;
+
/* number of interfaces with corresponding IFF_ flags */
atomic_t iff_allmultis, iff_promiscs;