package/kernel/mac80211/patches/ath/982-ath10k-fix-latency-issue-for-QCA988x.patch

   1 From: Miaoqing Pan <miaoqing@codeaurora.org>
   2 Subject: [PATCH] ath10k: fix latency issue for QCA988x
   3 Date: Thu, 29 Aug 2019 10:45:12 +0800
   4
   5 Bad latency is found on QCA988x, the issue was introduced by
   6 commit 4504f0e5b571 ("ath10k: sdio: workaround firmware UART
   7 pin configuration bug"). If uart_pin_workaround is false, this
   8 change will set uart pin even if uart_print is false.
   9
  10 Tested HW: QCA9880
  11 Tested FW: 10.2.4-1.0-00037
  12
  13 Fixes: 4504f0e5b571 ("ath10k: sdio: workaround firmware UART pin configuration bug")
  14 Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
  15 ---
  16  drivers/net/wireless/ath/ath10k/core.c | 15 +++++++++------
  17  1 file changed, 9 insertions(+), 6 deletions(-)
  18
  19 --- a/drivers/net/wireless/ath/ath10k/core.c
  20 +++ b/drivers/net/wireless/ath/ath10k/core.c
  21 @@ -2124,12 +2124,15 @@ static int ath10k_init_uart(struct ath10
  22                 return ret;
  23         }
  24
  25 -       if (!uart_print && ar->hw_params.uart_pin_workaround) {
  26 -               ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin,
  27 -                                        ar->hw_params.uart_pin);
  28 -               if (ret) {
  29 -                       ath10k_warn(ar, "failed to set UART TX pin: %d", ret);
  30 -                       return ret;
  31 +       if (!uart_print) {
  32 +               if (ar->hw_params.uart_pin_workaround) {
  33 +                       ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin,
  34 +                                                ar->hw_params.uart_pin);
  35 +                       if (ret) {
  36 +                               ath10k_warn(ar, "failed to set UART TX pin: %d",
  37 +                                           ret);
  38 +                               return ret;
  39 +                       }
  40                 }
  41
  42                 return 0;