From patchwork Wed Sep 29 07:00:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Po-Wen Kao X-Patchwork-Id: 12524701 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5F3DC433F5 for ; Wed, 29 Sep 2021 07:01:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F1BB613C8 for ; Wed, 29 Sep 2021 07:01:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244481AbhI2HCz (ORCPT ); Wed, 29 Sep 2021 03:02:55 -0400 Received: from mailgw01.mediatek.com ([60.244.123.138]:34276 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S229536AbhI2HCz (ORCPT ); Wed, 29 Sep 2021 03:02:55 -0400 X-UUID: 565c1f70ef764a769e0909e9db7ccfee-20210929 X-UUID: 565c1f70ef764a769e0909e9db7ccfee-20210929 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1605795204; Wed, 29 Sep 2021 15:01:10 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Wed, 29 Sep 2021 15:01:09 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 29 Sep 2021 15:01:09 +0800 From: Po-Wen Kao To: , , , , , , , , CC: , , , , , , , , , Subject: [PATCH 0/2] Fix UFS task management command timeout Date: Wed, 29 Sep 2021 15:00:45 +0800 Message-ID: <20210929070047.4223-1-powen.kao@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On UTP_TASK_REQ_COMPL interrupt, ufshcd_tmc_handler() iterates through busy requests in tags->rqs and complete request if corresponding doorbell flag is reset. However, ufshcd_issue_tm_cmd() allocates requests from tags->static_rqs and trigger doorbell directly without dispatching request through block layer, thus requests can never be found in tags->rqs and completed properly. Any TM command issued by ufshcd_issue_tm_cmd() inevitably timeout and further leads to recovery flow failure when LU Reset or Abort Task is issued. In this patch, blk_mq_tagset_busy_iter() call in ufshcd_tmc_handler() is replaced with new interface, blk_mq_drv_tagset_busy_iter(), to allow completion of request allocted by driver. The new interface is introduced for driver to iterate through requests in static_rqs. Po-Wen Kao (2): blk-mq: new busy request iterator for driver scsi: ufs: fix TM request timeout block/blk-mq-tag.c | 36 ++++++++++++++++++++++++++++++------ drivers/scsi/ufs/ufshcd.c | 2 +- include/linux/blk-mq.h | 4 ++++ 3 files changed, 35 insertions(+), 7 deletions(-)