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iwlwifi: mvm: rs: remove max_rate_idx

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max_rate_idx constraint is deprecated and it's handling is
faulty as well as it is relevant only for legacy rates but
was considered in HT/VHT. In most cases there was no side effect
as max_rate_idx was set to -1 but in certain cases like P2P
it got set to an actual rate idx which would limit the maximum
rate in HT/VHT by mistake.
max_rate_idx should be replaced by the masks fields but for
now remove it.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Eyal Shapira 2014-08-31 02:33:33 +03:00 committed by Emmanuel Grumbach
parent 099d8086a8
commit 2536e7c350
2 changed files with 3 additions and 29 deletions
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31
drivers/net/wireless/iwlwifi/mvm/rs.c
View File

@ -2036,18 +2036,7 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
return;
}
/* force user max rate if set by user */
if ((lq_sta->max_rate_idx != -1) &&
(lq_sta->max_rate_idx < index)) {
index = lq_sta->max_rate_idx;
update_lq = 1;
window = &(tbl->win[index]);
IWL_DEBUG_RATE(mvm,
"Forcing user max rate %d\n",
index);
goto lq_update;
}
/* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
window = &(tbl->win[index]);
/*
@ -2135,10 +2124,7 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
low = high_low & 0xff;
high = (high_low >> 8) & 0xff;
/* If user set max rate, dont allow higher than user constrain */
if ((lq_sta->max_rate_idx != -1) &&
(lq_sta->max_rate_idx < high))
high = IWL_RATE_INVALID;
/* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
sr = window->success_ratio;
@ -2370,23 +2356,13 @@ static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
struct ieee80211_tx_rate_control *txrc)
{
struct sk_buff *skb = txrc->skb;
struct ieee80211_supported_band *sband = txrc->sband;
struct iwl_op_mode *op_mode __maybe_unused =
(struct iwl_op_mode *)mvm_r;
struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct iwl_lq_sta *lq_sta = mvm_sta;
/* Get max rate if user set max rate */
if (lq_sta) {
lq_sta->max_rate_idx = txrc->max_rate_idx;
if ((sband->band == IEEE80211_BAND_5GHZ) &&
(lq_sta->max_rate_idx != -1))
lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE;
if ((lq_sta->max_rate_idx < 0) ||
(lq_sta->max_rate_idx >= IWL_RATE_COUNT))
lq_sta->max_rate_idx = -1;
}
/* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
/* Treat uninitialized rate scaling data same as non-existing. */
if (lq_sta && !lq_sta->pers.drv) {
@ -2587,7 +2563,6 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
* previous packets? Need to have IEEE 802.1X auth succeed immediately
* after assoc.. */
lq_sta->max_rate_idx = -1;
lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX;
lq_sta->band = sband->band;
/*

1
drivers/net/wireless/iwlwifi/mvm/rs.h
View File

@ -345,7 +345,6 @@ struct iwl_lq_sta {
u8 max_siso_rate_idx;
u8 max_mimo2_rate_idx;
s8 max_rate_idx; /* Max rate set by user */
u8 missed_rate_counter;
struct iwl_lq_cmd lq;