From patchwork Tue Feb 1 21:48:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Don Brace X-Patchwork-Id: 12732348 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 8B72BC433EF for ; Tue, 1 Feb 2022 21:48:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236212AbiBAVsP (ORCPT ); Tue, 1 Feb 2022 16:48:15 -0500 Received: from esa.microchip.iphmx.com ([68.232.153.233]:39807 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236013AbiBAVsN (ORCPT ); Tue, 1 Feb 2022 16:48:13 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1643752093; x=1675288093; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=aqtJqpMWVGv5tB5DS5LDnw+CBwpRS41P24HWh48M/7g=; b=Dhcp9eStj/pyOX97tPqjM8YdnQH93FT7/68EypUC37tmKAhEk8Ls/baX W9VOsf2CWooryHcziEFBTxcatOhZmnavOERGYGfetggD8B3kQRYxqAEdu XD8H46u9I8ShqeFqTtoKn3BHgP1rx3wTxDGPy3GO2hYvKNG/gSnzphVkx RX80l83Us0MYdxHoNZMKoVGGDlbp1zaZnrQ4bM6F40AYP/rs5ZzdtuD/n cWpLG5+bfbYNHW35S3vek963RFlDK2ecrRdlvjCv6s70x2VPMhBtAQysA dKGFgAE/DW9+miEuklZgavJukttWJp6HWLv0GaeX11Fl3/kWL5FMadd50 w==; IronPort-SDR: qJZkNDPXuk5vajnhsKUpJN8GWyPnwIHet1sy65UqxjT6y/xV7z8i7b1c7JohQhrWlFBJYVkMSS bzB09ZRpLiv9Jxznb1txRO6e3443Mnvh9NndEm5zkRtbR/LNeFGPYNZzFo+RDlWMooAkxe2e3v wCxPW9sZljmO0ZZ8h16UT0O/hiW1SX2AfUy+VpO3KVcbpXu8uU4U05AU5LV3Cfhj6fRcZEB+bS A+4OIBaHtWogPSy+FGapRc+SfHyVEv6Rt0o/RG4Mm9bBuS+XXCJ06h31Y8KmHRg+cMoZfmAJZd SjwufRvm+e2kOHoGQU9RcYO4 X-IronPort-AV: E=Sophos;i="5.88,335,1635231600"; d="scan'208";a="160764664" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 01 Feb 2022 14:48:13 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Tue, 1 Feb 2022 14:48:13 -0700 Received: from brunhilda.pdev.net (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Tue, 1 Feb 2022 14:48:13 -0700 Received: from brunhilda.pdev.net (localhost [127.0.0.1]) by brunhilda.pdev.net (Postfix) with ESMTP id 2A07D70236E; Tue, 1 Feb 2022 15:48:13 -0600 (CST) Subject: [PATCH 05/18] smartpqi: propagate path failures to SML quickly From: Don Brace To: , , , , , , , , , , , CC: Date: Tue, 1 Feb 2022 15:48:13 -0600 Message-ID: <164375209313.440833.9992416628621839233.stgit@brunhilda.pdev.net> In-Reply-To: <164375113574.440833.13174600317115819605.stgit@brunhilda.pdev.net> References: <164375113574.440833.13174600317115819605.stgit@brunhilda.pdev.net> User-Agent: StGit/1.4.dev36+g39bf3b02665a MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Murthy Bhat Return DID_NO_CONNECT when a path failure is detected. When a path fails during IO and AIO path gets disabled for a multipath device, the IO was retried in the RAID path slowing down path fail detection. Returning DID_NO_CONNECT allows multipath to switch paths more quickly. Reviewed-by: Scott Benesh Reviewed-by: Scott Teel Reviewed-by: Sagar Biradar Signed-off-by: Murthy Bhat Signed-off-by: Don Brace --- drivers/scsi/smartpqi/smartpqi_init.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index f51605cd098c..9bc2987e280f 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -2291,6 +2291,14 @@ static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device) return false; } +static inline bool pqi_is_multipath_device(struct pqi_scsi_dev *device) +{ + if (pqi_is_logical_device(device)) + return false; + + return (device->path_map & (device->path_map - 1)) != 0; +} + static inline bool pqi_expose_device(struct pqi_scsi_dev *device) { return !device->is_physical_device || !pqi_skip_device(device->scsi3addr); @@ -3216,12 +3224,14 @@ static void pqi_process_aio_io_error(struct pqi_io_request *io_request) int residual_count; int xfer_count; bool device_offline; + struct pqi_scsi_dev *device; scmd = io_request->scmd; error_info = io_request->error_info; host_byte = DID_OK; sense_data_length = 0; device_offline = false; + device = scmd->device->hostdata; switch (error_info->service_response) { case PQI_AIO_SERV_RESPONSE_COMPLETE: @@ -3246,8 +3256,14 @@ static void pqi_process_aio_io_error(struct pqi_io_request *io_request) break; case PQI_AIO_STATUS_AIO_PATH_DISABLED: pqi_aio_path_disabled(io_request); - scsi_status = SAM_STAT_GOOD; - io_request->status = -EAGAIN; + if (pqi_is_multipath_device(device)) { + pqi_device_remove_start(device); + host_byte = DID_NO_CONNECT; + scsi_status = SAM_STAT_CHECK_CONDITION; + } else { + scsi_status = SAM_STAT_GOOD; + io_request->status = -EAGAIN; + } break; case PQI_AIO_STATUS_NO_PATH_TO_DEVICE: case PQI_AIO_STATUS_INVALID_DEVICE: