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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 E2FBBC3B1A6 for ; Fri, 14 Feb 2020 17:33:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C065C2082F for ; Fri, 14 Feb 2020 17:33:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581701616; bh=sBaDOmkokyuUEfU4qYFt7arvizx6kazNaHDll8IyLF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NCQuPpJFGqWylYJlvLH+XPRUzROCRCqcI0u4u70Mstr338fSVcpQ8ZPg71EvEpTwA eBiLz3gu04orbUiO7+18CbVhRDKVWajbcv6hONoQPw9eujZD21a8iCnJJY5seX9GFY zOCC/mVi1wVZ64SFsgmQh7UF4CsZD7DsxPGZuubs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390398AbgBNQGW (ORCPT ); Fri, 14 Feb 2020 11:06:22 -0500 Received: from mail.kernel.org ([198.145.29.99]:56780 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389715AbgBNQGW (ORCPT ); Fri, 14 Feb 2020 11:06:22 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 02E1E206D7; Fri, 14 Feb 2020 16:06:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696380; bh=sBaDOmkokyuUEfU4qYFt7arvizx6kazNaHDll8IyLF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VBTGJWstKHMalC9dD7MiSmk55u30racvx2Ygnn6dGGnhQZDUMy9Y3gmF1BxToRzoi rqwqg1JACcv65L8tgVo4Wmd9SVtejS1GPgclXcW5ngbzcrlltptvIhBGgHbpjg4WMF uUl2bl7gdHF7I+73FYfpmp+pnS/EiZj+6T+tXPqw= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Can Guo , Alim Akhtar , Bean Huo , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 208/459] scsi: ufs: Complete pending requests in host reset and restore path Date: Fri, 14 Feb 2020 10:57:38 -0500 Message-Id: <20200214160149.11681-208-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214160149.11681-1-sashal@kernel.org> References: <20200214160149.11681-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Can Guo [ Upstream commit 2df74b6985b51e77756e2e8faa16c45ca3ba53c5 ] In UFS host reset and restore path, before probe, we stop and start the host controller once. After host controller is stopped, the pending requests, if any, are cleared from the doorbell, but no completion IRQ would be raised due to the hba is stopped. These pending requests shall be completed along with the first NOP_OUT command (as it is the first command which can raise a transfer completion IRQ) sent during probe. Since the OCSs of these pending requests are not SUCCESS (because they are not yet literally finished), their UPIUs shall be dumped. When there are multiple pending requests, the UPIU dump can be overwhelming and may lead to stability issues because it is in atomic context. Therefore, before probe, complete these pending requests right after host controller is stopped and silence the UPIU dump from them. Link: https://lore.kernel.org/r/1574751214-8321-5-git-send-email-cang@qti.qualcomm.com Reviewed-by: Alim Akhtar Reviewed-by: Bean Huo Tested-by: Bean Huo Signed-off-by: Can Guo Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/ufs/ufshcd.c | 24 ++++++++++-------------- drivers/scsi/ufs/ufshcd.h | 2 ++ 2 files changed, 12 insertions(+), 14 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index b0d6978d78bf8..6b5ec4bbcdb02 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4788,7 +4788,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) break; } /* end of switch */ - if (host_byte(result) != DID_OK) + if ((host_byte(result) != DID_OK) && !hba->silence_err_logs) ufshcd_print_trs(hba, 1 << lrbp->task_tag, true); return result; } @@ -5321,8 +5321,8 @@ static void ufshcd_err_handler(struct work_struct *work) /* * if host reset is required then skip clearing the pending - * transfers forcefully because they will automatically get - * cleared after link startup. + * transfers forcefully because they will get cleared during + * host reset and restore */ if (needs_reset) goto skip_pending_xfer_clear; @@ -6205,9 +6205,15 @@ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba) int err; unsigned long flags; - /* Reset the host controller */ + /* + * Stop the host controller and complete the requests + * cleared by h/w + */ spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_hba_stop(hba, false); + hba->silence_err_logs = true; + ufshcd_complete_requests(hba); + hba->silence_err_logs = false; spin_unlock_irqrestore(hba->host->host_lock, flags); /* scale up clocks to max frequency before full reinitialization */ @@ -6241,7 +6247,6 @@ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba) static int ufshcd_reset_and_restore(struct ufs_hba *hba) { int err = 0; - unsigned long flags; int retries = MAX_HOST_RESET_RETRIES; do { @@ -6251,15 +6256,6 @@ static int ufshcd_reset_and_restore(struct ufs_hba *hba) err = ufshcd_host_reset_and_restore(hba); } while (err && --retries); - /* - * After reset the door-bell might be cleared, complete - * outstanding requests in s/w here. - */ - spin_lock_irqsave(hba->host->host_lock, flags); - ufshcd_transfer_req_compl(hba); - ufshcd_tmc_handler(hba); - spin_unlock_irqrestore(hba->host->host_lock, flags); - return err; } diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 52c9676a12425..089013b758a19 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -513,6 +513,7 @@ struct ufs_stats { * @uic_error: UFS interconnect layer error status * @saved_err: sticky error mask * @saved_uic_err: sticky UIC error mask + * @silence_err_logs: flag to silence error logs * @dev_cmd: ufs device management command information * @last_dme_cmd_tstamp: time stamp of the last completed DME command * @auto_bkops_enabled: to track whether bkops is enabled in device @@ -670,6 +671,7 @@ struct ufs_hba { u32 saved_err; u32 saved_uic_err; struct ufs_stats ufs_stats; + bool silence_err_logs; /* Device management request data */ struct ufs_dev_cmd dev_cmd; -- 2.20.1