From patchwork Thu Dec 17 22:53:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miao-chen Chou X-Patchwork-Id: 11980963 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 3DDE6C2BBCF for ; Thu, 17 Dec 2020 22:54:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A15E23A56 for ; Thu, 17 Dec 2020 22:54:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732142AbgLQWy0 (ORCPT ); Thu, 17 Dec 2020 17:54:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732039AbgLQWyS (ORCPT ); Thu, 17 Dec 2020 17:54:18 -0500 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AA0AC0617B0 for ; Thu, 17 Dec 2020 14:53:38 -0800 (PST) Received: by mail-pf1-x432.google.com with SMTP id w6so346570pfu.1 for ; Thu, 17 Dec 2020 14:53:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=fRqpnsxfl7qHr4VGqHrEfBZUN2xnW4XoVy0GlNX3IEw=; b=M7tyJ75ZEoEHtHRFHXWzjAukeGU6uZWu4hbrVNbxb4pviOUrB3bQahQtCfSC+9p2m0 YDbKmXSabg6qZDYR7dqyDdhad3kdv7qLeVSxCaRhSh8fTvXp8w00pJZo8oMSmq2YxgXl fNBAwH8sxrhgbeSxvMpB24u/EOf+k1SOiNXGw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=fRqpnsxfl7qHr4VGqHrEfBZUN2xnW4XoVy0GlNX3IEw=; b=m3j957p8AXsYuMQ+JAyJNqKmcAERnc+OUOfygAlKabBVt8WBQX0rFLv41qGlNmMJz0 2a2fqV5UlpjxaDrhhye4Y36sedDBb3WXdOXFuEfXr7y+JB6/UaTJv513gBcxTfBUIrG7 gRopoUfI5oHL0Vrz+rsYl0MD17rbsEdzLqKNJ8wgVwS6dVHa4Rsfw19s3IgLAmT/+6jf /iTTRpnHt8kE1zBWttenZCEvdilZpNf9ZC+gfbdwhuQotdMN/ZL2AUV1NpUA7l1IFtf9 svc5p3nZezvF+kVeqd5qQj8iY2ryFcpze7+DQ+RIOrK/M3tcb+WNLREvmBy9VHkAFbbx aKDA== X-Gm-Message-State: AOAM531x0BDah6EIw9eMfE7zGRLvTxEhW6AnbJ/t/Xpylqh+I3faAWBq Q7DUxwyGnNPv9JyiwSJcEAU0uMlcz2MMZg== X-Google-Smtp-Source: ABdhPJyOQPClQLF1y6Xhcm5nUIsJcSrkwCk6ErtPzkEBtpkBszZYYYcHnTdPbU3QjM4VER8TSicGxw== X-Received: by 2002:aa7:8701:0:b029:19e:561:d476 with SMTP id b1-20020aa787010000b029019e0561d476mr1477814pfo.2.1608245617759; Thu, 17 Dec 2020 14:53:37 -0800 (PST) Received: from localhost ([2620:15c:202:201:de4a:3eff:fe75:1314]) by smtp.gmail.com with ESMTPSA id c14sm6559544pfd.37.2020.12.17.14.53.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Dec 2020 14:53:37 -0800 (PST) From: Miao-chen Chou To: Bluetooth Kernel Mailing List Cc: Alain Michaud , Luiz Augusto von Dentz , Archie Pusaka , Marcel Holtmann , Miao-chen Chou , Abhishek Pandit-Subedi , "David S. Miller" , Jakub Kicinski , Johan Hedberg , Luiz Augusto von Dentz , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v2 1/4] Bluetooth: Keep MSFT ext info throughout a hci_dev's life cycle Date: Thu, 17 Dec 2020 14:53:15 -0800 Message-Id: <20201217145149.v2.1.Id9bc5434114de07512661f002cdc0ada8b3d6d02@changeid> X-Mailer: git-send-email 2.29.2.684.gfbc64c5ab5-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org This moves msft_do_close() from hci_dev_do_close() to hci_unregister_dev() to avoid clearing MSFT extension info. This also avoids retrieving MSFT info upon every msft_do_open() if MSFT extension has been initialized. The following test steps were performed. (1) boot the test device and verify the MSFT support debug log in syslog (2) restart bluetoothd and verify msft_do_close() doesn't get invoked Signed-off-by: Miao-chen Chou Reviewed-by: Abhishek Pandit-Subedi Reviewed-by: Archie Pusaka --- (no changes since v1) net/bluetooth/hci_core.c | 4 ++-- net/bluetooth/msft.c | 3 ++- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 9d2c9a1c552fd..8471be105a2ac 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -1780,8 +1780,6 @@ int hci_dev_do_close(struct hci_dev *hdev) hci_sock_dev_event(hdev, HCI_DEV_DOWN); - msft_do_close(hdev); - if (hdev->flush) hdev->flush(hdev); @@ -3869,6 +3867,8 @@ void hci_unregister_dev(struct hci_dev *hdev) unregister_pm_notifier(&hdev->suspend_notifier); cancel_work_sync(&hdev->suspend_prepare); + msft_do_close(hdev); + hci_dev_do_close(hdev); if (!test_bit(HCI_INIT, &hdev->flags) && diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c index 4b39534a14a18..d9d2269bc93ef 100644 --- a/net/bluetooth/msft.c +++ b/net/bluetooth/msft.c @@ -76,7 +76,8 @@ void msft_do_open(struct hci_dev *hdev) { struct msft_data *msft; - if (hdev->msft_opcode == HCI_OP_NOP) + /* Skip if opcode is not supported or MSFT has been initiatlized */ + if (hdev->msft_opcode == HCI_OP_NOP || hdev->msft_data) return; bt_dev_dbg(hdev, "Initialize MSFT extension");