From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D849CA9EA0 for ; Tue, 22 Oct 2019 08:26:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F79421783 for ; Tue, 22 Oct 2019 08:26:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="eb0dm47I"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="DH4Qnrxr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388404AbfJVI0k (ORCPT ); Tue, 22 Oct 2019 04:26:40 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:46376 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388155AbfJVI0j (ORCPT ); Tue, 22 Oct 2019 04:26:39 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 1DE316079D; Tue, 22 Oct 2019 08:26:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1571732799; bh=K/gWunNfzWpOoNvgi+N0faiER3IPcKA6AOuagWiAEAY=; h=Subject:From:In-Reply-To:References:To:Cc:Date:From; b=eb0dm47I0/sBoWudqGk9JM2i4FLYHWx2OMpG5wMTL7sjikPQfQVes9IPdczF8vzVt QyTcF9pFqVCU+E/ldC6tBvQ4KvDrgH9QS+DYnXiPuzwXVW9rNP/cpXngql5laRRi/h LpmPliwWjnwhLBdwxLLF+bncCg+uH7vV3iEXlBGw= Received: from potku.adurom.net (88-114-240-156.elisa-laajakaista.fi [88.114.240.156]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: kvalo@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 393CC60779; Tue, 22 Oct 2019 08:26:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1571732798; bh=K/gWunNfzWpOoNvgi+N0faiER3IPcKA6AOuagWiAEAY=; h=Subject:From:In-Reply-To:References:To:Cc:From; b=DH4QnrxraDMwUgEb33K7vebJVkhj04kFQWh9z8Nc0Kg6plBEnjFBUpfL+VZLQ002r noANk2vFykv+fJ4iXttxitkT/RL1j2TIErEOv3c5SJr1JY1B/sQBp9rbGGZbJ063EB nUedHV3HGlS4uELVtrIsmnBaSQduJhb6WMJv/7uY= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 393CC60779 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=kvalo@codeaurora.org Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [PATCH v2] rtl8xxxu: fix RTL8723BU connection failure issue after warm reboot From: Kalle Valo In-Reply-To: <20191016015408.11091-1-chiu@endlessm.com> References: <20191016015408.11091-1-chiu@endlessm.com> To: Chris Chiu Cc: Jes.Sorensen@gmail.com, davem@davemloft.net, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux@endlessm.com User-Agent: pwcli/0.0.0-git (https://github.com/kvalo/pwcli/) Python/2.7.12 Message-Id: <20191022082639.1DE316079D@smtp.codeaurora.org> Date: Tue, 22 Oct 2019 08:26:39 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Chris Chiu wrote: > The RTL8723BU has problems connecting to AP after each warm reboot. > Sometimes it returns no scan result, and in most cases, it fails > the authentication for unknown reason. However, it works totally > fine after cold reboot. > > Compare the value of register SYS_CR and SYS_CLK_MAC_CLK_ENABLE > for cold reboot and warm reboot, the registers imply that the MAC > is already powered and thus some procedures are skipped during > driver initialization. Double checked the vendor driver, it reads > the SYS_CR and SYS_CLK_MAC_CLK_ENABLE also but doesn't skip any > during initialization based on them. This commit only tells the > RTL8723BU to do full initialization without checking MAC status. > > Signed-off-by: Chris Chiu > Signed-off-by: Jes Sorensen Patch applied to wireless-drivers-next.git, thanks. 0eeb91ade90c rtl8xxxu: fix RTL8723BU connection failure issue after warm reboot -- https://patchwork.kernel.org/patch/11192201/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches