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=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 00468C07E9B for ; Mon, 19 Jul 2021 15:43:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DBAB361283 for ; Mon, 19 Jul 2021 15:43:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344550AbhGSPC2 (ORCPT ); Mon, 19 Jul 2021 11:02:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:53808 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344224AbhGSO7b (ORCPT ); Mon, 19 Jul 2021 10:59:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BF1946138C; Mon, 19 Jul 2021 15:39:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626709160; bh=dUcqScZ99UmglqjM0SgZlPfZ5qO4WHRNMphFVA1USQo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qpE+iR116rowMkU6swbO2Id4ajhuumc/NYad1CTc/nvojYZAA4YbnPQvWwY5JF81s gVzQBgMpJp3fPau9iGv5deBrlEDjw4CG9C5C/1fP+Ay8uKyFxj2pE9PwbbM4j/BRHn seiDYdrlabVjD+aG3ynzZQ7irSf8g7YdP1KGXthM= 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 4.19 275/421] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc. Date: Mon, 19 Jul 2021 16:51:26 +0200 Message-Id: <20210719144955.883932144@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144946.310399455@linuxfoundation.org> References: <20210719144946.310399455@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 1b0adf5c2376..7188f0fb2e05 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2595,6 +2595,11 @@ 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