From patchwork Wed Jul 1 21:13:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Winkler X-Patchwork-Id: 11637271 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ED8DB739 for ; Wed, 1 Jul 2020 21:13:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D465E20870 for ; Wed, 1 Jul 2020 21:13:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="X4N13e+9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727050AbgGAVNo (ORCPT ); Wed, 1 Jul 2020 17:13:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726441AbgGAVNn (ORCPT ); Wed, 1 Jul 2020 17:13:43 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 456A6C08C5DC for ; Wed, 1 Jul 2020 14:13:43 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id p22so27394417ybg.21 for ; Wed, 01 Jul 2020 14:13:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=1693jLPCRTZKv04e3tT1L2R/SD/azULEZvoSLa7Hf7o=; b=X4N13e+9sePnsNX3KaC3ifEpq8r8prYY7zHclzCR5upKpuH+zMAIp0a3v81FRPNLSQ G/oEf3GoGKzfnImMohbfzdfak484FP/LerO7QfZnV6oiJy5RkPeJ4JGyaWW4d/KoT+og xaCTxxyLWdrK4Iy5oj1E4JZQLNCwWwFK+QmJ/rHwp8YgFpakYgrdyJcDKvQ7Hhutimdk veAa42QeTkaDOUzn9UlIWlC4KV+uT51zeVpLjn2F2l8a/oToAXzSKFN4laYPXVsvB7KO IWeEQJElTFTPPbn1R8LGZw8Vc3cSYrMYEomRY+SMbjXzjp+LawK0qruJeF/TCA8JmuqR 92mA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=1693jLPCRTZKv04e3tT1L2R/SD/azULEZvoSLa7Hf7o=; b=QCT73f/0KrJgDrlMp5u9VXvMagC7QxmMwFOaFCWtIgmA0zk7XGchTht6R6V8fUqm5k 2DHpTsVXBchec5/3ta1wwstSGH6En44fjXwk5tESballDH5wnAKszuzTAfRSXI0xitba XuJp9M6FeqfaEYPtyvhwO/fLTADOWkeGo7GO/u9zKpCo9UcBpZSKWt4NcFy2Hnf5goSb yKEfYGYyLXM/mROpPmRH78OTRTI+nRkpAQ2e//KFJnHXIFq6V1ff8XYs9n4KmUtZhzLn 6NuLH70oSbZfcCUjGUVwHfJWWS/iTVvMgaBAkSS/pVdTiAx1ilnTEYwugwUw01tmxHsD 4TEA== X-Gm-Message-State: AOAM530D9+UMCYA95XsA4QqXA5cMd1OCICrGNDurpqw/F285bc+/+tZY mTwuHJVdxA3C53SWDst7CribIOS2NRzy5e4Oi0YP X-Google-Smtp-Source: ABdhPJz8wsHLEwNJYlVtw6qZZkh7AGzr6LYq5q8mwTBXuA/WiMwNXf+RKMjvBio06uTM33Rt9QsVW8X11w5NfovFi+WJ X-Received: by 2002:a25:c7d3:: with SMTP id w202mr29331301ybe.84.1593638022312; Wed, 01 Jul 2020 14:13:42 -0700 (PDT) Date: Wed, 1 Jul 2020 14:13:36 -0700 Message-Id: <20200701211337.3027448-1-danielwinkler@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.27.0.212.ge8ba1cc988-goog Subject: [PATCH v2 0/1] Revert "serial: 8250: Fix max baud limit in generic 8250 port" From: Daniel Winkler To: linux-serial@vger.kernel.org, linux-mediatek@lists.infradead.org, Serge Semin , Alexey Malahov Cc: BlueZ , chromeos-bluetooth-upstreaming , stable@vger.kernel.org, abhishekpandit@chromium.org, Daniel Winkler , Aaron Sierra , Andy Shevchenko , Greg Kroah-Hartman , Jiri Slaby , Lukas Wunner , Vignesh Raghavendra , linux-kernel@vger.kernel.org Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org This change regresses the QCA6174A-3 bluetooth chip, preventing firmware from being properly loaded. Without this change, the chip works as intended. The device is the Kukui Chromebook using the Mediatek chipset and the 8250_mtk uart. Initial controller baudrate is 115200 and operating speed is 3000000. Our entire suite of bluetooth tests now fail on this platform due to an apparent failure to sync its firmware on initialization. The driver is in the cros tree at drivers/bluetooth/hci_qca.c and uses the serdev interface. Specifically, this is the QCA_ROME chipset. Daniel Winkler (1): Revert "serial: 8250: Fix max baud limit in generic 8250 port" drivers/tty/serial/8250/8250_port.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)