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authorMaxim Altshul <maxim.altshul@ti.com>2016-08-22 17:14:04 +0300
committerJohannes Berg <johannes.berg@intel.com>2016-09-12 12:36:21 +0300
commit480dd46b9d6812e5fb7172c305ee0f1154c26eed (patch)
tree858fa5173c1f03edde7f4f260d10c805e7faa817 /net/mac80211
parente4819013840bbad025ed6da660c1e8b3e9e8430a (diff)
downloadlinux-480dd46b9d6812e5fb7172c305ee0f1154c26eed.tar.xz
mac80211: RX BA support for sta max_rx_aggregation_subframes
The ability to change the max_rx_aggregation frames is useful in cases of IOP. There exist some devices (latest mobile phones and some AP's) that tend to not respect a BA sessions maximum size (in Kbps). These devices won't respect the AMPDU size that was negotiated during association (even though they do respect the maximal number of packets). This violation is characterized by a valid number of packets in a single AMPDU. Even so, the total size will exceed the size negotiated during association. Eventually, this will cause some undefined behavior, which in turn causes the hw to drop packets, causing the throughput to plummet. This patch will make the subframe limitation to be held by each station, instead of being held only by hw. Signed-off-by: Maxim Altshul <maxim.altshul@ti.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/agg-rx.c7
-rw-r--r--net/mac80211/sta_info.c3
2 files changed, 8 insertions, 2 deletions
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index a9aff6079c42..282e99bdb301 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -298,10 +298,13 @@ void __ieee80211_start_rx_ba_session(struct sta_info *sta,
buf_size = IEEE80211_MAX_AMPDU_BUF;
/* make sure the size doesn't exceed the maximum supported by the hw */
- if (buf_size > local->hw.max_rx_aggregation_subframes)
- buf_size = local->hw.max_rx_aggregation_subframes;
+ if (buf_size > sta->sta.max_rx_aggregation_subframes)
+ buf_size = sta->sta.max_rx_aggregation_subframes;
params.buf_size = buf_size;
+ ht_dbg(sta->sdata, "AddBA Req buf_size=%d for %pM\n",
+ buf_size, sta->sta.addr);
+
/* examine state machine */
mutex_lock(&sta->ampdu_mlme.mtx);
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 19f14c907d74..5e70fa52e1ff 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -340,6 +340,9 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
memcpy(sta->addr, addr, ETH_ALEN);
memcpy(sta->sta.addr, addr, ETH_ALEN);
+ sta->sta.max_rx_aggregation_subframes =
+ local->hw.max_rx_aggregation_subframes;
+
sta->local = local;
sta->sdata = sdata;
sta->rx_stats.last_rx = jiffies;