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Date:   Tue, 22 Dec 2020 21:17:03 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Ching-Te Ku <ku920601@...ltek.com>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 060/130] rtw88: coex: change the decode method from firmware

From: Ching-Te Ku <ku920601@...ltek.com>

[ Upstream commit 362c4a5cc886e9c369bf2106ab648c2ad076abb6 ]

Fix sometimes FW information will be parsed as wrong value,
do a correction of sign bit to show the correct information.
(Ex, Value should be 20, but it shows 236.)

Signed-off-by: Ching-Te Ku <ku920601@...ltek.com>
Signed-off-by: Ping-Ke Shih <pkshih@...ltek.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Link: https://lore.kernel.org/r/20201112031430.4846-12-pkshih@realtek.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/realtek/rtw88/coex.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw88/coex.c b/drivers/net/wireless/realtek/rtw88/coex.c
index 853ac1c2ed73c..634044a14bb78 100644
--- a/drivers/net/wireless/realtek/rtw88/coex.c
+++ b/drivers/net/wireless/realtek/rtw88/coex.c
@@ -2451,7 +2451,7 @@ void rtw_coex_wl_fwdbginfo_notify(struct rtw_dev *rtwdev, u8 *buf, u8 length)
 		if (buf[i] >= val)
 			coex_stat->wl_fw_dbg_info[i] = buf[i] - val;
 		else
-			coex_stat->wl_fw_dbg_info[i] = val - buf[i];
+			coex_stat->wl_fw_dbg_info[i] = 255 - val + buf[i];
 
 		coex_stat->wl_fw_dbg_info_pre[i] = buf[i];
 	}
-- 
2.27.0

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