From patchwork Fri Jan 15 01:36:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Can Guo X-Patchwork-Id: 364244 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,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 18256C433E0 for ; Fri, 15 Jan 2021 01:37:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DCD9823A7C for ; Fri, 15 Jan 2021 01:37:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731548AbhAOBh3 (ORCPT ); Thu, 14 Jan 2021 20:37:29 -0500 Received: from labrats.qualcomm.com ([199.106.110.90]:13949 "EHLO labrats.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731543AbhAOBh2 (ORCPT ); Thu, 14 Jan 2021 20:37:28 -0500 IronPort-SDR: bTWwoMesqL3F8HKe1G74d+N1DyTdenKBbnMJQzc5luVeAA1Kf7HWzxcbXMVRPqP0BJNoTjHN1x 2QIe92xPCA2Rj1HIc7zKb4HCHOcTdt44G7o2wQGAfnAbli9dL+OySyi8eNTyzzREIlNai0Jq7Z jGq9vIGWI+e8knqQC78XXIh7Kz0UzkxXUcN4W5Kmm6Zx0a2W2GN6quT2TspMDqBRTvGSFf2/z9 DAYwEPmgRQh8cNlNV5y5l+XxjYavnUmbSf9f+rqG1L1BNZedMiB8Pri/IagBmG/BudOp8RHzE6 t6E= X-IronPort-AV: E=Sophos;i="5.79,347,1602572400"; d="scan'208";a="29542003" Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by labrats.qualcomm.com with ESMTP; 14 Jan 2021 17:36:33 -0800 X-QCInternal: smtphost Received: from stor-presley.qualcomm.com ([192.168.140.85]) by ironmsg04-sd.qualcomm.com with ESMTP; 14 Jan 2021 17:36:32 -0800 Received: by stor-presley.qualcomm.com (Postfix, from userid 359480) id 0F54F218C5; Thu, 14 Jan 2021 17:36:32 -0800 (PST) From: Can Guo To: asutoshd@codeaurora.org, nguyenb@codeaurora.org, hongwus@codeaurora.org, linux-scsi@vger.kernel.org, kernel-team@android.com, cang@codeaurora.org Cc: Nitin Rawat , Andy Gross , Bjorn Andersson , Alim Akhtar , Avri Altman , "James E.J. Bottomley" , "Martin K. Petersen" , linux-arm-msm@vger.kernel.org (open list:ARM/QUALCOMM SUPPORT), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 2/2] scsi: ufs-qcom: Disable interrupt in reset path Date: Thu, 14 Jan 2021 17:36:19 -0800 Message-Id: <1610674580-20811-3-git-send-email-cang@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1610674580-20811-1-git-send-email-cang@codeaurora.org> References: <1610674580-20811-1-git-send-email-cang@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Nitin Rawat Disable interrupt in reset path to flush pending IRQ handler in order to avoid possible NoC issues. Signed-off-by: Nitin Rawat Signed-off-by: Can Guo diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 2206b1e..e55201f 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -253,12 +253,17 @@ static int ufs_qcom_host_reset(struct ufs_hba *hba) { int ret = 0; struct ufs_qcom_host *host = ufshcd_get_variant(hba); + bool reenable_intr = false; if (!host->core_reset) { dev_warn(hba->dev, "%s: reset control not set\n", __func__); goto out; } + reenable_intr = hba->is_irq_enabled; + disable_irq(hba->irq); + hba->is_irq_enabled = false; + ret = reset_control_assert(host->core_reset); if (ret) { dev_err(hba->dev, "%s: core_reset assert failed, err = %d\n", @@ -280,6 +285,11 @@ static int ufs_qcom_host_reset(struct ufs_hba *hba) usleep_range(1000, 1100); + if (reenable_intr) { + enable_irq(hba->irq); + hba->is_irq_enabled = true; + } + out: return ret; }