From patchwork Fri Feb 11 07:56:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zijun Hu X-Patchwork-Id: 542202 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B068C433EF for ; Fri, 11 Feb 2022 07:56:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347859AbiBKH4t (ORCPT ); Fri, 11 Feb 2022 02:56:49 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:57724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245121AbiBKH4s (ORCPT ); Fri, 11 Feb 2022 02:56:48 -0500 Received: from m43-7.mailgun.net (m43-7.mailgun.net [69.72.43.7]) by lindbergh.monkeyblade.net (Postfix) with UTF8SMTPS id 5D453BD2 for ; Thu, 10 Feb 2022 23:56:48 -0800 (PST) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1644566208; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=KMBfuQ9cnWhBdTSAfP+/B5gEDLZBEABwyfbhSdmF+zE=; b=jyHrWM/Yj6deOkL+dxn23ylnr6deXoYR31RxXTWVO6zBEfGA7CQ5tFTAGx77L5CKvt1fwtTh 0O1sPHHxEaX96PJ3iBnchPMAodnzoH4JWoocPMDMQb70d7caGfQXITmQC/C3t7vXu3q/tItQ qqdIL/rroj+rjh03f6DchvDVAEs= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n06.prod.us-east-1.postgun.com with SMTP id 620616be2afeb7f9b5f89407 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 11 Feb 2022 07:56:46 GMT Sender: zijuhu=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id E1B83C43616; Fri, 11 Feb 2022 07:56:45 +0000 (UTC) Received: from zijuhu-gv.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: zijuhu) by smtp.codeaurora.org (Postfix) with ESMTPSA id 518FDC4338F; Fri, 11 Feb 2022 07:56:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org 518FDC4338F Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org From: Zijun Hu To: marcel@holtmann.org, johan.hedberg@gmail.com, luiz.dentz@gmail.com Cc: linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-arm-msm@vger.kernel.org, c-hbandi@codeaurora.org, hemantg@codeaurora.org, rjliao@codeaurora.org, zijuhu@codeaurora.org, tjiang@codeaurora.org, Zijun Hu Subject: [PATCH v1] Bluetooth: btusb: Improve stability for QCA devices Date: Fri, 11 Feb 2022 15:56:36 +0800 Message-Id: <1644566196-15424-1-git-send-email-zijuhu@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Zijun Hu Controller will reset after NVM is downloaded for QCA device, so wait a moment for reset Done then go ahead to improve stability. Signed-off-by: Zijun Hu --- drivers/bluetooth/btusb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index e03dfbd92fcc..0ec2f17fe1d3 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2994,6 +2994,7 @@ static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev, #define QCA_PATCH_UPDATED 0x80 #define QCA_DFU_TIMEOUT 3000 #define QCA_FLAG_MULTI_NVM 0x80 +#define QCA_BT_RESET_WAIT_MS 100 #define WCN6855_2_0_RAM_VERSION_GF 0x400c1200 #define WCN6855_2_1_RAM_VERSION_GF 0x400c1211 @@ -3320,6 +3321,10 @@ static int btusb_setup_qca(struct hci_dev *hdev) err = btusb_setup_qca_load_nvm(hdev, &ver, info); if (err < 0) return err; + /* Controller will reset after NVM is downloaded, so wait a moment + * for reset Done, it will prevent controller from potential crash. + */ + msleep(QCA_BT_RESET_WAIT_MS); } return 0;