From patchwork Thu Mar 11 20:15:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Don Brace X-Patchwork-Id: 12132829 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 32898C43381 for ; Thu, 11 Mar 2021 20:15:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA50E64F89 for ; Thu, 11 Mar 2021 20:15:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229938AbhCKUPR (ORCPT ); Thu, 11 Mar 2021 15:15:17 -0500 Received: from esa.microchip.iphmx.com ([68.232.153.233]:63181 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229555AbhCKUPI (ORCPT ); Thu, 11 Mar 2021 15:15:08 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1615493709; x=1647029709; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Uctky9EkB2d4SYpQGrVLids7YPzyLIIV2KMGUTrBut4=; b=iqrPc2YuhLUuKFwF3gGAF9qOlnw23Gnmnd+HBlfZcklQ2maIQjtRPRWD JZpSvBTqi7roH39Dtcw71gsA6IpSWis8tb/27A4XqzPWptVG7BAeRBLys HdZ/Bvidr2kkvX5is8NDNCmEAsiGmgTM8jAaK/cL03o9XGXeJNO43XAr9 Xp6xgfsEXzyF/E0aA9uHXcd8LtEsUwcHvAI2vo3gMpJUnLlFASYHhjuMu oOxn9OYCnmglPmsBdxnmemuJGTDt1asssAvZT2ycTIlASomMI55JXbjMW iuGU0onHXlYpN2NgCtq/2A+8Yajj1hcXYmnjC1wCJ3oqyOA1KYp6qzera A==; IronPort-SDR: z8VVbDL0kzKs+NFxwEm9nc5UchPuHzOeqcATUUXcYGI9d0PnUzkKZaLVMWK+AkYmvAOI8erPYW jlymU3zGdzf38yoso3cNb8gutGVTTkUToTErkVMnK5Ux0mJlhG1WSk4PaXHTUJefFEF8d+KKIq 6xUYhJelUho0EnUX3Gjyi4+tVlEU9aXHcgvf7OTtXkBcKB7UdlsYXssrQR132zV2gZr+DyN4Ub OEc2F/pj7TPoND9JU8FDRjAq6uSUQWXHtIOJL0UrXAoGvnklQy/wj0H7KDx1OSGvL9Kzk5eT98 jHo= X-IronPort-AV: E=Sophos;i="5.81,241,1610434800"; d="scan'208";a="112405943" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 11 Mar 2021 13:15:09 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 11 Mar 2021 13:15:04 -0700 Received: from [127.0.1.1] (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2176.2 via Frontend Transport; Thu, 11 Mar 2021 13:15:03 -0700 Subject: [PATCH V5 02/31] smartpqi: fix request leakage From: Don Brace To: , , , , , , , , , , , CC: Date: Thu, 11 Mar 2021 14:15:03 -0600 Message-ID: <161549370379.25025.12793264112620796062.stgit@brunhilda> In-Reply-To: <161549045434.25025.17473629602756431540.stgit@brunhilda> References: <161549045434.25025.17473629602756431540.stgit@brunhilda> User-Agent: StGit/0.23-dirty MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Murthy Bhat Correct request leakage during reset operations. * While failing queued IOs in TMF path, there was a request leak and hence stale entries in request pool with ref count being nonzero. In shutdown path, we have a BUG_ON to catch stuck IO either in f/w or in the driver. The stale requests caused a system crash. The IO request pool leakage also lead to a significant performance drop. Reviewed-by: Scott Teel Reviewed-by: Scott Benesh Reviewed-by: Kevin Barnett Signed-off-by: Murthy Bhat Signed-off-by: Don Brace --- drivers/scsi/smartpqi/smartpqi_init.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 61e3a5afaf07..4533085c4de6 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -5489,6 +5489,8 @@ static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info, list_del(&io_request->request_list_entry); set_host_byte(scmd, DID_RESET); + pqi_free_io_request(io_request); + scsi_dma_unmap(scmd); pqi_scsi_done(scmd); } @@ -5525,6 +5527,8 @@ static void pqi_fail_io_queued_for_all_devices(struct pqi_ctrl_info *ctrl_info) list_del(&io_request->request_list_entry); set_host_byte(scmd, DID_RESET); + pqi_free_io_request(io_request); + scsi_dma_unmap(scmd); pqi_scsi_done(scmd); }