From: Larry Finger <Larry.Finger@lwfinger.net>
Date: Wed, 20 Sep 2017 21:15:05 +0000 (-0500)
Subject: rtlwifi: rtl8821ae: Fix connection lost problem
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b8b8b16352cd90c6083033fd4487f04fae935c18;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

rtlwifi: rtl8821ae: Fix connection lost problem

In commit 40b368af4b75 ("rtlwifi: Fix alignment issues"), the read
of REG_DBI_READ was changed from 16 to 8 bits. For unknown reasonsi
this change results in reduced stability for the wireless connection.
This regression was located using bisection.

Fixes: 40b368af4b75 ("rtlwifi: Fix alignment issues")
Reported-and-tested-by: James Cameron <quozl@laptop.org>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org> # 4.11+
Cc: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
index 4f73012978e9..1d431d4bf6d2 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
@@ -1122,7 +1122,7 @@ static u8 _rtl8821ae_dbi_read(struct rtl_priv *rtlpriv, u16 addr)
 	}
 	if (0 == tmp) {
 		read_addr = REG_DBI_RDATA + addr % 4;
-		ret = rtl_read_byte(rtlpriv, read_addr);
+		ret = rtl_read_word(rtlpriv, read_addr);
 	}
 	return ret;
 }