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mac80211: add helper for management / no-ack frame rate decision

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All current rate control algorithms agree to send management and no-ack
frames at the lowest rate. They also agree to do this when sta
and the private rate control data is NULL. We add a hlper to mac80211
for this and simplify the rate control algorithm code.

Developers wishing to make enhancements to rate control algorithms
are for broadcast/multicast can opt to not use this in their
gate_rate() mac80211 callback.

Cc: Zhu Yi <yi.zhu@intel.com>
Acked-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: ipw3945-devel@lists.sourceforge.net
Cc: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Cc: Derek Smithies <derek@indranet.co.nz>
Cc: Chittajit Mitra <Chittajit.Mitra@Atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez
2009-07-16 10:05:41 -07:00
committed by John W. Linville
parent 943ab70f6a
commit 4c6d4f5c33
7 changed files with 59 additions and 60 deletions
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13
drivers/net/wireless/iwlwifi/iwl-3945-rs.c
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@@ -673,7 +673,6 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta,
s8 scale_action = 0;
unsigned long flags;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
__le16 fc;
u16 rate_mask = sta ? sta->supp_rates[sband->band] : 0;
s8 max_rate_idx = -1;
struct iwl_priv *priv = (struct iwl_priv *)priv_r;
@@ -681,16 +680,10 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta,
IWL_DEBUG_RATE(priv, "enter\n");
/* Send management frames and NO_ACK data using lowest rate. */
fc = hdr->frame_control;
if (!ieee80211_is_data(fc) || info->flags & IEEE80211_TX_CTL_NO_ACK ||
!sta || !priv_sta) {
IWL_DEBUG_RATE(priv, "leave: No STA priv data to update!\n");
info->control.rates[0].idx = rate_lowest_index(sband, sta);
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
info->control.rates[0].count = 1;
if (rate_control_send_low(sta, priv_sta, txrc))
return;
}
rate_mask = sta->supp_rates[sband->band];
/* get user max rate if set */
max_rate_idx = txrc->max_rate_idx;