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=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 9DA2FC636C8 for ; Thu, 15 Jul 2021 19:42:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 79E2961285 for ; Thu, 15 Jul 2021 19:42:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345124AbhGOTom (ORCPT ); Thu, 15 Jul 2021 15:44:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:50994 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244833AbhGOTPQ (ORCPT ); Thu, 15 Jul 2021 15:15:16 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8AC8961421; Thu, 15 Jul 2021 19:11:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626376295; bh=9CZYZH1IJIqZRfQ/cPp5d9YX2cUsPDo8NZVgJPiZQHA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=quPoqpW7ENTCYAdfL286yy9ghNoCuHMwEXlHDIL4KZtEbXD29NSoDbgzvCG+DLZUl DvPAnPP703Pe6mqc1vZhDp0bVB/dyt5QMyppK3693o0m2uJUqkWTn8J/UvxntTi7/l vlVFfjmmBZuiyEXz6UJqw53HNNGVI1Tdy5bgbbWY= 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 5.13 168/266] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc. Date: Thu, 15 Jul 2021 20:38:43 +0200 Message-Id: <20210715182642.081204347@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210715182613.933608881@linuxfoundation.org> References: <20210715182613.933608881@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 1cec9b2353c6..6d23308119d1 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -4071,6 +4071,11 @@ 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