package/kernel/mac80211/patches/301-ath9k-force-rx_clear-when-disabling-rx.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Sun, 7 Jun 2015 13:53:35 +0200
   3 Subject: [PATCH] ath9k: force rx_clear when disabling rx
   4
   5 This makes stopping Rx more reliable and should reduce the frequency of
   6 Rx related DMA stop warnings. Don't use rx_clear in TX99 mode.
   7
   8 Cc: stable@vger.kernel.org
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
  11 ---
  12
  13 --- a/drivers/net/wireless/ath/ath9k/mac.c
  14 +++ b/drivers/net/wireless/ath/ath9k/mac.c
  15 @@ -677,13 +677,18 @@ void ath9k_hw_startpcureceive(struct ath
  16
  17         ath9k_ani_reset(ah, is_scanning);
  18
  19 -       REG_CLR_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
  20 +       REG_CLR_BIT(ah, AR_DIAG_SW,
  21 +                   AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT | AR_DIAG_FORCE_RX_CLEAR);
  22  }
  23  EXPORT_SYMBOL(ath9k_hw_startpcureceive);
  24
  25  void ath9k_hw_abortpcurecv(struct ath_hw *ah)
  26  {
  27 -       REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_ABORT | AR_DIAG_RX_DIS);
  28 +       u32 reg = AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT;
  29 +
  30 +       if (!config_enabled(CPTCFG_ATH9K_TX99))
  31 +               reg |= AR_DIAG_FORCE_RX_CLEAR;
  32 +       REG_SET_BIT(ah, AR_DIAG_SW, reg);
  33
  34         ath9k_hw_disable_mib_counters(ah);
  35  }