diff options
| author | Thomas Pedersen <thomas@cozybit.com> | 2012-03-06 03:31:48 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-03-07 00:16:17 +0400 |
| commit | 6b62bf326393deede630731a933713de9d574128 (patch) | |
| tree | 73d17abe9a0c55938dae6378bab61dc82343881a /net/mac80211/mesh_hwmp.c | |
| parent | 8097e1494459a4f9cdbaba7440334d9bd11a39f0 (diff) | |
| download | linux-6b62bf326393deede630731a933713de9d574128.tar.xz | |
mac80211: fix mesh airtime link metric estimating
Airtime link metric estimation was broken in HT mesh, use
cfg80211_calculate_bitrate to get the right rate value.
Also factor out tx rate copying from sta_set_sinfo().
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/mesh_hwmp.c')
| -rw-r--r-- | net/mac80211/mesh_hwmp.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index 4a993f2d1ae1..1c6f3d02aebf 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -324,6 +324,7 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local, struct sta_info *sta) { struct ieee80211_supported_band *sband; + struct rate_info rinfo; /* This should be adjusted for each device */ int device_constant = 1 << ARITH_SHIFT; int test_frame_len = TEST_FRAME_LEN << ARITH_SHIFT; @@ -337,7 +338,9 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local, if (sta->fail_avg >= 100) return MAX_METRIC; - if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS) + sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo); + rate = cfg80211_calculate_bitrate(&rinfo); + if (WARN_ON(!rate)) return MAX_METRIC; err = (sta->fail_avg << ARITH_SHIFT) / 100; @@ -345,7 +348,6 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local, /* bitrate is in units of 100 Kbps, while we need rate in units of * 1Mbps. This will be corrected on tx_time computation. */ - rate = sband->bitrates[sta->last_tx_rate.idx].bitrate; tx_time = (device_constant + 10 * test_frame_len / rate); estimated_retx = ((1 << (2 * ARITH_SHIFT)) / (s_unit - err)); result = (tx_time * estimated_retx) >> (2 * ARITH_SHIFT) ; |