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=-20.2 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 E0F01C07E9B for ; Mon, 19 Jul 2021 16:07:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC3C46008E for ; Mon, 19 Jul 2021 16:07:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347585AbhGSPTv (ORCPT ); Mon, 19 Jul 2021 11:19:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:35202 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237711AbhGSOoJ (ORCPT ); Mon, 19 Jul 2021 10:44:09 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 872A86120E; Mon, 19 Jul 2021 15:22:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626708148; bh=flRU1/nWCDRQ6R0bshuPatNPWKM0h0EUK/k/aA8oMCQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KT4nSl+fkGC9Z3fMrwGeBlBPi+N5tEXfrHJ137EBDpghJwO4u8w/4xj8may5hxvSK ZXlB+09hhq8cjVNWbNUFGNS69da614sKlNzFmPq0oqxpJp7p2VoPnURR+HYnt4XUR6 Z7SG66ruDUkRbp+YKxZ9KoE7O2eMMGsToenOJ8oo= 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 4.14 199/315] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc. Date: Mon, 19 Jul 2021 16:51:28 +0200 Message-Id: <20210719144949.971770642@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144942.861561397@linuxfoundation.org> References: <20210719144942.861561397@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: linux-kernel@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 424f399cc79b..f2e84e09c970 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2614,6 +2614,11 @@ 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