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| author | Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de> | 2013-07-08 16:55:51 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-07-16 09:58:04 +0300 |
| commit | 438b61b77082e70d2a408cc77b8c5faac312e940 (patch) | |
| tree | 2a4575f29605a16fc051a6b81c71d0f3b31d7d77 /net/mac80211/tx.c | |
| parent | 3de805cf965d69c8d3d7d69368d5fd2c925a2d5a (diff) | |
| download | linux-438b61b77082e70d2a408cc77b8c5faac312e940.tar.gz linux-438b61b77082e70d2a408cc77b8c5faac312e940.tar.bz2 linux-438b61b77082e70d2a408cc77b8c5faac312e940.zip | |
mac80211: fix timing for 5 MHz and 10 MHz channels
according to IEEE 802.11-2012 section 18, various timings change
when using 5 MHz and 10 MHz. Reflect this by using a "shift" when
calculating durations.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 4105d0ca963e..3523daa0b15c 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -40,7 +40,7 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, struct sk_buff *skb, int group_addr, int next_frag_len) { - int rate, mrate, erp, dur, i; + int rate, mrate, erp, dur, i, shift; struct ieee80211_rate *txrate; struct ieee80211_local *local = tx->local; struct ieee80211_supported_band *sband; @@ -153,6 +153,8 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, rate = mrate; } + shift = ieee80211_vif_get_shift(&tx->sdata->vif); + /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ if (ieee80211_is_data_qos(hdr->frame_control) && *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) @@ -162,7 +164,8 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up * to closest integer */ dur = ieee80211_frame_duration(sband->band, 10, rate, erp, - tx->sdata->vif.bss_conf.use_short_preamble); + tx->sdata->vif.bss_conf.use_short_preamble, + shift); if (next_frag_len) { /* Frame is fragmented: duration increases with time needed to @@ -171,7 +174,8 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, /* next fragment */ dur += ieee80211_frame_duration(sband->band, next_frag_len, txrate->bitrate, erp, - tx->sdata->vif.bss_conf.use_short_preamble); + tx->sdata->vif.bss_conf.use_short_preamble, + shift); } return cpu_to_le16(dur); |