package/kernel/mac80211/patches/326-ath9k-use-one-shot-read-in-ath9k_hw_update_mibstats.patch

   1 From: Oleksij Rempel <linux@rempel-privat.de>
   2 Date: Sun, 22 Mar 2015 19:29:53 +0100
   3 Subject: [PATCH] ath9k: use one shot read in ath9k_hw_update_mibstats
   4
   5 this will reduce some overhead on usb bus.
   6
   7 Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
   8 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
   9 ---
  10
  11 --- a/drivers/net/wireless/ath/ath9k/ani.c
  12 +++ b/drivers/net/wireless/ath/ath9k/ani.c
  13 @@ -107,11 +107,21 @@ static const struct ani_cck_level_entry
  14  static void ath9k_hw_update_mibstats(struct ath_hw *ah,
  15                                      struct ath9k_mib_stats *stats)
  16  {
  17 -       stats->ackrcv_bad += REG_READ(ah, AR_ACK_FAIL);
  18 -       stats->rts_bad += REG_READ(ah, AR_RTS_FAIL);
  19 -       stats->fcs_bad += REG_READ(ah, AR_FCS_FAIL);
  20 -       stats->rts_good += REG_READ(ah, AR_RTS_OK);
  21 -       stats->beacons += REG_READ(ah, AR_BEACON_CNT);
  22 +       u32 addr[5] = {AR_RTS_OK, AR_RTS_FAIL, AR_ACK_FAIL,
  23 +                      AR_FCS_FAIL, AR_BEACON_CNT};
  24 +       u32 data[5];
  25 +
  26 +       REG_READ_MULTI(ah, &addr[0], &data[0], 5);
  27 +       /* AR_RTS_OK */
  28 +       stats->rts_good += data[0];
  29 +       /* AR_RTS_FAIL */
  30 +       stats->rts_bad += data[1];
  31 +       /* AR_ACK_FAIL */
  32 +       stats->ackrcv_bad += data[2];
  33 +       /* AR_FCS_FAIL */
  34 +       stats->fcs_bad += data[3];
  35 +       /* AR_BEACON_CNT */
  36 +       stats->beacons += data[4];
  37  }
  38
  39  static void ath9k_ani_restart(struct ath_hw *ah)