Save a memcpy by just storing updates directly in the skb
control block.
Signed-off-by: Bob Copeland <m...@bobcopeland.com>
---
drivers/net/wireless/ath/ath5k/base.c | 41 +++++++++++++++++----------------
1 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/drivers/net/wireless/ath/ath5k/base.c
b/drivers/net/wireless/ath/ath5k/base.c
index c4adf98..10bf015 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -1741,7 +1741,7 @@ ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct
sk_buff *skb,
static void
ath5k_tasklet_rx(unsigned long data)
{
- struct ieee80211_rx_status rxs = {};
+ struct ieee80211_rx_status *rxs;
struct ath5k_rx_status rs = {};
struct sk_buff *skb, *next_skb;
dma_addr_t next_skb_addr;
@@ -1751,6 +1751,7 @@ ath5k_tasklet_rx(unsigned long data)
int ret;
int hdrlen;
int padsize;
+ int rx_flag;
spin_lock(&sc->rxbuflock);
if (list_empty(&sc->rxbuf)) {
@@ -1758,7 +1759,7 @@ ath5k_tasklet_rx(unsigned long data)
goto unlock;
}
do {
- rxs.flag = 0;
+ rx_flag = 0;
bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
BUG_ON(bf->skb == NULL);
@@ -1802,7 +1803,7 @@ ath5k_tasklet_rx(unsigned long data)
goto accept;
}
if (rs.rs_status & AR5K_RXERR_MIC) {
- rxs.flag |= RX_FLAG_MMIC_ERROR;
+ rx_flag |= RX_FLAG_MMIC_ERROR;
goto accept;
}
@@ -1840,6 +1841,7 @@ accept:
memmove(skb->data + padsize, skb->data, hdrlen);
skb_pull(skb, padsize);
}
+ rxs = IEEE80211_SKB_RXCB(skb);
/*
* always extend the mac timestamp, since this information is
@@ -1861,41 +1863,40 @@ accept:
* impossible to comply to that. This affects IBSS merge only
* right now, so it's not too bad...
*/
- rxs.mactime = ath5k_extend_tsf(sc->ah, rs.rs_tstamp);
- rxs.flag |= RX_FLAG_TSFT;
+ rxs->mactime = ath5k_extend_tsf(sc->ah, rs.rs_tstamp);
+ rxs->flag = rx_flag | RX_FLAG_TSFT;
- rxs.freq = sc->curchan->center_freq;
- rxs.band = sc->curband->band;
+ rxs->freq = sc->curchan->center_freq;
+ rxs->band = sc->curband->band;
- rxs.noise = sc->ah->ah_noise_floor;
- rxs.signal = rxs.noise + rs.rs_rssi;
+ rxs->noise = sc->ah->ah_noise_floor;
+ rxs->signal = rxs->noise + rs.rs_rssi;
/* An rssi of 35 indicates you should be able use
* 54 Mbps reliably. A more elaborate scheme can be used
* here but it requires a map of SNR/throughput for each
* possible mode used */
- rxs.qual = rs.rs_rssi * 100 / 35;
+ rxs->qual = rs.rs_rssi * 100 / 35;
/* rssi can be more than 35 though, anything above that
* should be considered at 100% */
- if (rxs.qual > 100)
- rxs.qual = 100;
+ if (rxs->qual > 100)
+ rxs->qual = 100;
- rxs.antenna = rs.rs_antenna;
- rxs.rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate);
- rxs.flag |= ath5k_rx_decrypted(sc, ds, skb, &rs);
+ rxs->antenna = rs.rs_antenna;
+ rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate);
+ rxs->flag |= ath5k_rx_decrypted(sc, ds, skb, &rs);
- if (rxs.rate_idx >= 0 && rs.rs_rate ==
- sc->curband->bitrates[rxs.rate_idx].hw_value_short)
- rxs.flag |= RX_FLAG_SHORTPRE;
+ if (rxs->rate_idx >= 0 && rs.rs_rate ==
+ sc->curband->bitrates[rxs->rate_idx].hw_value_short)
+ rxs->flag |= RX_FLAG_SHORTPRE;
ath5k_debug_dump_skb(sc, skb, "RX ", 0);
/* check beacons in IBSS mode */
if (sc->opmode == NL80211_IFTYPE_ADHOC)
- ath5k_check_ibss_tsf(sc, skb, &rxs);
+ ath5k_check_ibss_tsf(sc, skb, rxs);
- memcpy(IEEE80211_SKB_RXCB(skb), &rxs, sizeof(rxs));
ieee80211_rx(sc->hw, skb);
bf->skb = next_skb;
--
1.6.2.5
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