From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:41360 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751192AbeC0Q3a (ORCPT ); Tue, 27 Mar 2018 12:29:30 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Larry Finger , James Cameron , Kalle Valo Subject: [PATCH 4.4 27/43] rtlwifi: rtl8723be: Fix loss of signal Date: Tue, 27 Mar 2018 18:27:31 +0200 Message-Id: <20180327162717.940562599@linuxfoundation.org> In-Reply-To: <20180327162716.407986916@linuxfoundation.org> References: <20180327162716.407986916@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 78dc897b7ee67205423dbbc6b56be49fb18d15b5 upstream. In commit c713fb071edc ("rtlwifi: rtl8821ae: Fix connection lost problem correctly") a problem in rtl8821ae that caused loss of signal was fixed. That same problem has now been reported for rtl8723be. Accordingly, the ASPM L1 latency has been increased from 0 to 7 to fix the instability. Signed-off-by: Larry Finger Cc: Stable Tested-by: James Cameron Signed-off-by: Kalle Valo Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/realtek/rtlwifi/rtl8723be/hw.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/hw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/hw.c @@ -1123,7 +1123,8 @@ static void _rtl8723be_enable_aspm_back_ /* Configuration Space offset 0x70f BIT7 is used to control L0S */ tmp8 = _rtl8723be_dbi_read(rtlpriv, 0x70f); - _rtl8723be_dbi_write(rtlpriv, 0x70f, tmp8 | BIT(7)); + _rtl8723be_dbi_write(rtlpriv, 0x70f, tmp8 | BIT(7) | + ASPM_L1_LATENCY << 3); /* Configuration Space offset 0x719 Bit3 is for L1 * BIT4 is for clock request