From: Miaoqing Pan Subject: [PATCH] ath10k: fix latency issue for QCA988x Date: Thu, 29 Aug 2019 10:45:12 +0800 Bad latency is found on QCA988x, the issue was introduced by commit 4504f0e5b571 ("ath10k: sdio: workaround firmware UART pin configuration bug"). If uart_pin_workaround is false, this change will set uart pin even if uart_print is false. Tested HW: QCA9880 Tested FW: 10.2.4-1.0-00037 Fixes: 4504f0e5b571 ("ath10k: sdio: workaround firmware UART pin configuration bug") Signed-off-by: Miaoqing Pan --- drivers/net/wireless/ath/ath10k/core.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -2124,12 +2124,15 @@ static int ath10k_init_uart(struct ath10 return ret; } - if (!uart_print && ar->hw_params.uart_pin_workaround) { - ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin, - ar->hw_params.uart_pin); - if (ret) { - ath10k_warn(ar, "failed to set UART TX pin: %d", ret); - return ret; + if (!uart_print) { + if (ar->hw_params.uart_pin_workaround) { + ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin, + ar->hw_params.uart_pin); + if (ret) { + ath10k_warn(ar, "failed to set UART TX pin: %d", + ret); + return ret; + } } return 0;