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=-19.4 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=ham 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 5867EC636C9 for ; Thu, 15 Jul 2021 19:02:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 417FC613ED for ; Thu, 15 Jul 2021 19:02:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241989AbhGOTFU (ORCPT ); Thu, 15 Jul 2021 15:05:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:38918 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242359AbhGOTDi (ORCPT ); Thu, 15 Jul 2021 15:03:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 71854613C4; Thu, 15 Jul 2021 18:59:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626375576; bh=uNeipIKXrHdGL9rAuof73YYg8QiXPXN5XDsB8t2siVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1qREWxDFyeeSuxGDQvUu+xI+6Owhrt34FYkIhk9+ahnBjVkPZz6cK6xSqb7zyB6wB smZktILM5USN3fjzBSFviqImNPIJjSC10jyVnSsYats7JLKWma+D9QdgKruh9QJYNU AEDeT3MChFs8IRI8hS2kkfYLds3OXWbXGEdMnYnA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tim Jiang , Marcel Holtmann , Sasha Levin Subject: [PATCH 5.12 145/242] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc. Date: Thu, 15 Jul 2021 20:38:27 +0200 Message-Id: <20210715182618.735895954@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210715182551.731989182@linuxfoundation.org> References: <20210715182551.731989182@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tim Jiang [ Upstream commit 4f00bfb372674d586c4a261bfc595cbce101fbb6 ] This is btsoc timing issue, after host start to downloading bt firmware, ep2 need time to switch from function acl to function dfu, so host add 20ms delay as workaround. Signed-off-by: Tim Jiang Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- drivers/bluetooth/btusb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 64b0e68c68eb..a97e5c476adf 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -4136,6 +4136,11 @@ static int btusb_setup_qca_download_fw(struct hci_dev *hdev, sent += size; count -= size; + /* ep2 need time to switch from function acl to function dfu, + * so we add 20ms delay here. + */ + msleep(20); + while (count) { size = min_t(size_t, count, QCA_DFU_PACKET_LEN); -- 2.30.2