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authorSimon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de>2013-07-08 16:55:51 +0200
committerJohannes Berg <johannes.berg@intel.com>2013-07-16 09:58:04 +0300
commit438b61b77082e70d2a408cc77b8c5faac312e940 (patch)
tree2a4575f29605a16fc051a6b81c71d0f3b31d7d77 /net/mac80211/tx.c
parent3de805cf965d69c8d3d7d69368d5fd2c925a2d5a (diff)
downloadlinux-stericsson-438b61b77082e70d2a408cc77b8c5faac312e940.tar.gz
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.c10
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);