[PATCH rtw-next v2 2/2] wifi: rtw89: Lower the timeout in rtw89_fwdl_check_path_ready_ax() for USB

[Bitterblue Smith <rtl8821cerfe2@gmail.com>]

When the chip is not powered on correctly (like during driver
development) rtw89_fwdl_check_path_ready_ax() can fail.
read_poll_timeout_atomic() with a delay of 1 µs and a timeout of
400000 µs can take 50 seconds with USB because of the time it takes to
send a USB control message. The firmware upload is tried 5 times, so
in total it takes 250 seconds.

Lower the timeout to 3200 for USB in order to reduce the time
rtw89_fwdl_check_path_ready_ax() takes from 50 seconds to less than 1
second.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
---
v2:
 - Lower the timeout for USB instead of increasing the delay.
 - Don't change rtw89_fwdl_check_path_ready_be().  It uses a larger
   timeout than rtw89_fwdl_check_path_ready_ax(). Leave it for later
   when I can test it.
---
 drivers/net/wireless/realtek/rtw89/fw.h  | 1 +
 drivers/net/wireless/realtek/rtw89/mac.c | 8 +++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw89/fw.h b/drivers/net/wireless/realtek/rtw89/fw.h
index a731c242f389..7e07df4beba7 100644
--- a/drivers/net/wireless/realtek/rtw89/fw.h
+++ b/drivers/net/wireless/realtek/rtw89/fw.h
@@ -4697,6 +4697,7 @@ struct rtw89_c2h_rf_tas_info {
 #define RTW89_FW_BACKTRACE_KEY 0xBACEBACE
 
 #define FWDL_WAIT_CNT 400000
+#define FWDL_WAIT_CNT_USB 3200
 
 int rtw89_fw_check_rdy(struct rtw89_dev *rtwdev, enum rtw89_fwdl_check_type type);
 int rtw89_fw_recognize(struct rtw89_dev *rtwdev);
diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index f6bbc796329c..dfaf33173611 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -6932,10 +6932,16 @@ int rtw89_fwdl_check_path_ready_ax(struct rtw89_dev *rtwdev,
 				   bool h2c_or_fwdl)
 {
 	u8 check = h2c_or_fwdl ? B_AX_H2C_PATH_RDY : B_AX_FWDL_PATH_RDY;
+	u32 timeout;
 	u8 val;
 
+	if (rtwdev->hci.type == RTW89_HCI_TYPE_USB)
+		timeout = FWDL_WAIT_CNT_USB;
+	else
+		timeout = FWDL_WAIT_CNT;
+
 	return read_poll_timeout_atomic(rtw89_read8, val, val & check,
-					1, FWDL_WAIT_CNT, false,
+					1, timeout, false,
 					rtwdev, R_AX_WCPU_FW_CTRL);
 }
 
-- 
2.50.0