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 7EEF8C636CE for ; Mon, 19 Jul 2021 15:02:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6808A61002 for ; Mon, 19 Jul 2021 15:02:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242980AbhGSOVe (ORCPT ); Mon, 19 Jul 2021 10:21:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:54960 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241790AbhGSOT6 (ORCPT ); Mon, 19 Jul 2021 10:19:58 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7F47F6113B; Mon, 19 Jul 2021 15:00:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626706838; bh=1sBETN6rIbaTwHUtC11AQYjCwr1sxghOp+CJdkx7l4I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BWdztktwlsQIMv0zJJomSZ/YjKWTaxM4+oU1XQLuSRMCJgNfaGSaqPIJhZbCZnyD4 SU1gWfI42HL/s99Fqvlj4NteeKN2XQ6+TyhYWBcGBkeaquqpxb6tErPfqUn7mcF/v/ etyg2XHMCxNoKJUBJaK/3EefwY7FNgoNdW0FCo54= 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 4.4 121/188] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc. Date: Mon, 19 Jul 2021 16:51:45 +0200 Message-Id: <20210719144940.414168099@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144913.076563739@linuxfoundation.org> References: <20210719144913.076563739@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 7039a58a6a4e..3d62f17111cb 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2555,6 +2555,11 @@ 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