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ath9k: simplify ath_tx_form_aggr 

The check for ATH_AMPDU_SUBFRAME_DEFAULT is unnecessary, since it's set
to half the maximum BlockAck Window size, which is already the maximum
value that h_baw could possibly have. Also remove unnecessary variables.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2013-08-06 14:18:06 +02:00 committed by John W. Linville
parent 18fcf1c6a6
commit a1cd94d345
2 changed files with 12 additions and 22 deletions
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1
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -137,7 +137,6 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
#define ATH_AGGR_ENCRYPTDELIM 10
/* minimum h/w qdepth to be sustained to maximize aggregation */
#define ATH_AGGR_MIN_QDEPTH 2
#define ATH_AMPDU_SUBFRAME_DEFAULT 32
#define IEEE80211_SEQ_SEQ_SHIFT 4
#define IEEE80211_SEQ_MAX 4096

33
drivers/net/wireless/ath/ath9k/xmit.c
View File

@ -906,9 +906,9 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
{
#define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL;
int rl = 0, nframes = 0, ndelim, prev_al = 0;
int nframes = 0, ndelim;
u16 aggr_limit = 0, al = 0, bpad = 0,
al_delta, h_baw = tid->baw_size / 2;
al_delta, h_baw = tid->baw_size / 2;
enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
struct ieee80211_tx_info *tx_info;
struct ath_frame_info *fi;
@ -925,33 +925,24 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
skb = bf->bf_mpdu;
fi = get_frame_info(skb);
if (!bf_first)
if (!bf_first) {
bf_first = bf;
if (!rl) {
ath_set_rates(tid->an->vif, tid->an->sta, bf);
aggr_limit = ath_lookup_rate(sc, bf, tid);
rl = 1;
}
/* do not exceed aggregation limit */
al_delta = ATH_AGGR_DELIM_SZ + fi->framelen;
if (nframes) {
if (aggr_limit < al + bpad + al_delta ||
ath_lookup_legacy(bf) || nframes >= h_baw) {
status = ATH_AGGR_LIMITED;
break;
}
if (nframes &&
((aggr_limit < (al + bpad + al_delta + prev_al)) ||
ath_lookup_legacy(bf))) {
status = ATH_AGGR_LIMITED;
break;
}
tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
if (nframes && (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
break;
/* do not exceed subframe limit */
if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) {
status = ATH_AGGR_LIMITED;
break;
tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
break;
}
/* add padding for previous frame to aggregation length */