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=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 B183EC11F6F for ; Tue, 6 Jul 2021 11:48:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A95C561FE6 for ; Tue, 6 Jul 2021 11:48:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241021AbhGFLts (ORCPT ); Tue, 6 Jul 2021 07:49:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:47608 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237614AbhGFLgT (ORCPT ); Tue, 6 Jul 2021 07:36:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2F1F461F50; Tue, 6 Jul 2021 11:28:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625570923; bh=flRU1/nWCDRQ6R0bshuPatNPWKM0h0EUK/k/aA8oMCQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a9YVj14tZ60OPO0qN2cgr3yzVJKu6W01MZsDLetMjvU98IrWJ/K6LycT7Ypy7B/x4 nBXHa1Ys4L1M1A9sxhoARZh67d5YyQRpSVebGtoipHaCN4QuSBZt0k/tHQsaouftq3 Wru3zy+2tXu0htq20DrKxatJn56T4WY2sc+1kigVBv3ytNlZ/rLLgZfsGtP9sxodoc cHEfdxhh0MkNIucCG0cvGpKBLQfhO4V9FdUJaDntYdNwX0iD81bpTSJ9RKAgYabmzY lBHZWk0gKaNiwJVaG6xUzqqb6Wj0cD46Mt2+aUJrhRYky9lWMWb1DRRsxGLuPqkNdl 1vh7X2NxLx7dg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tim Jiang , Marcel Holtmann , Sasha Levin , linux-bluetooth@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 43/45] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc. Date: Tue, 6 Jul 2021 07:27:47 -0400 Message-Id: <20210706112749.2065541-43-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210706112749.2065541-1-sashal@kernel.org> References: <20210706112749.2065541-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@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