From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:39402 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932863AbdJXNBW (ORCPT ); Tue, 24 Oct 2017 09:01:22 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Larry Finger , Ping-Ke Shih , Kalle Valo Subject: [PATCH 4.4 20/27] rtlwifi: rtl8821ae: Fix connection lost problem Date: Tue, 24 Oct 2017 14:58:05 +0200 Message-Id: <20171024125711.885719493@linuxfoundation.org> In-Reply-To: <20171024125711.074929246@linuxfoundation.org> References: <20171024125711.074929246@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Larry Finger commit b8b8b16352cd90c6083033fd4487f04fae935c18 upstream. 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 Signed-off-by: Larry Finger Cc: Ping-Ke Shih Signed-off-by: Kalle Valo Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c @@ -1127,7 +1127,7 @@ static u8 _rtl8821ae_dbi_read(struct rtl } 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; }