From patchwork Thu Aug 30 03:26:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suganath Prabu S X-Patchwork-Id: 10581179 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 180DA13AC for ; Thu, 30 Aug 2018 03:27:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 07D482BCE4 for ; Thu, 30 Aug 2018 03:27:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F08B42BCE6; Thu, 30 Aug 2018 03:27:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 66E0C2BCE4 for ; Thu, 30 Aug 2018 03:27:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727502AbeH3H1N (ORCPT ); Thu, 30 Aug 2018 03:27:13 -0400 Received: from mail-qk0-f194.google.com ([209.85.220.194]:38538 "EHLO mail-qk0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727281AbeH3H1N (ORCPT ); Thu, 30 Aug 2018 03:27:13 -0400 Received: by mail-qk0-f194.google.com with SMTP id g197-v6so4861957qke.5 for ; Wed, 29 Aug 2018 20:27:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HI35y/L3200GR8R++CHCn/fbAmgZDygUDDKi3dtV03g=; b=B1eqVOg9GR6EC5afv7n7Z9NbEhosy7igASrdqZZwTgtWZHHTyJkzRr2gfbnF02W0/m mJQLeJ6mlKQEbaFHlopqJNKuVxrmypv46erULfRzmZAyQuCHTHfwxPx6wSnkj+cxXRm5 Uij77dUG8IjRSNK2QhVGZ/L2UQbEt7UJ4vI2U= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HI35y/L3200GR8R++CHCn/fbAmgZDygUDDKi3dtV03g=; b=l8KXej8s6OmIYIlWba8Vrx6cn6JaPORwsgsx5r3Cedz/3rDt3xv305IUZ3zb6psAy2 QkK1ceC67GOxYwTqoCiU3/hU4mj3qajRkVKK3oY8pkZoCebWHZjwsdeuBROkSBZQvHDh w/5FF34Q0WMotyIgj50SsOa5kDRD7n54+mDaa+X79wZIe8QOM6qFX2hl68uAjKNGxA3v ZL9CLSX70+W+YjFEFN/joHTU3ZgZVgMJULTxzEAFccuHPCgNuoOYgGcOFiAnlqkYo2S4 oHlegrg34eo8cw9WXu77/LDzoCIRdwSxAYNgg6YqtpZiU92wsdkiVK1+SYUqOU78MPW3 EfqQ== X-Gm-Message-State: APzg51AWWZ9YTAOnCfWA+/iZFoLwR33P6SlCgitTPG/oRlDZYeeKo5ia DMJqEIOVmsmgqZcn8Dva1AkrYo22lp4= X-Google-Smtp-Source: ANB0VdamBCTpka/4EVNZuW/TV9lw7C7XpSpZnP2x8r/hcX63Tjx29vI77lEE38zQ/WlLJhld7yyPgg== X-Received: by 2002:a37:9242:: with SMTP id u63-v6mr8944896qkd.189.1535599631168; Wed, 29 Aug 2018 20:27:11 -0700 (PDT) Received: from localhost.localdomain.localdomain ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id f184-v6sm3215427qkc.23.2018.08.29.20.27.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 29 Aug 2018 20:27:10 -0700 (PDT) From: Suganath Prabu S To: linux-scsi@vger.kernel.org Cc: Sathya.Prakash@broadcom.com, sreekanth.reddy@broadcom.com, Suganath Prabu S Subject: [PATCH 4/7] mpt3sas: Introdude _scsih_get_shost_and_ioc. Date: Wed, 29 Aug 2018 23:26:30 -0400 Message-Id: <1535599593-4739-5-git-send-email-suganath-prabu.subramani@broadcom.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1535599593-4739-1-git-send-email-suganath-prabu.subramani@broadcom.com> References: <1535599593-4739-1-git-send-email-suganath-prabu.subramani@broadcom.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The code for getting shost and IOC is redundant so moved that to function "scsih_get_shost_and_ioc". Also checks for NULL are added to IOC and shost. Signed-off-by: Suganath Prabu S --- drivers/scsi/mpt3sas/mpt3sas_scsih.c | 98 ++++++++++++++++++++++++++++++------ 1 file changed, 82 insertions(+), 16 deletions(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index 7e0c4ec..2c7f44c 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -9809,6 +9809,35 @@ _scsih_ir_shutdown(struct MPT3SAS_ADAPTER *ioc) } /** + * _scsih_get_shost_and_ioc - get shost and ioc + * and verify whether they are NULL or not + * @pdev: PCI device struct + * @shost: address of scsi host pointer + * @ioc: address of HBA adapter pointer + * + * Return zero if *shost and *ioc are not NULL otherwise return error number. + */ +static int +_scsih_get_shost_and_ioc(struct pci_dev *pdev, + struct Scsi_Host **shost, struct MPT3SAS_ADAPTER **ioc) +{ + *shost = pci_get_drvdata(pdev); + if (*shost == NULL) { + dev_err(&pdev->dev, "pdev's driver data is null\n"); + return -ENXIO; + } + + *ioc = shost_priv(*shost); + if (*ioc == NULL) { + dev_err(&pdev->dev, "shost's private data is null\n"); + return -ENXIO; + } + + return 0; +} + + +/** * scsih_remove - detach and remove add host * @pdev: PCI device struct * @@ -9816,8 +9845,8 @@ _scsih_ir_shutdown(struct MPT3SAS_ADAPTER *ioc) */ static void scsih_remove(struct pci_dev *pdev) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; struct _sas_port *mpt3sas_port, *next_port; struct _raid_device *raid_device, *next; struct MPT3SAS_TARGET *sas_target_priv_data; @@ -9825,6 +9854,10 @@ static void scsih_remove(struct pci_dev *pdev) struct workqueue_struct *wq; unsigned long flags; + if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) { + dev_err(&pdev->dev, "unable to remove device\n"); + return; + } ioc->remove_host = 1; mpt3sas_wait_for_commands_to_complete(ioc); @@ -9900,11 +9933,16 @@ static void scsih_remove(struct pci_dev *pdev) static void scsih_shutdown(struct pci_dev *pdev) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; struct workqueue_struct *wq; unsigned long flags; + if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) { + dev_err(&pdev->dev, "unable to shutdown device\n"); + return; + } + ioc->remove_host = 1; mpt3sas_wait_for_commands_to_complete(ioc); @@ -10721,10 +10759,16 @@ out_add_shost_fail: static int scsih_suspend(struct pci_dev *pdev, pm_message_t state) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; pci_power_t device_state; + int rc; + rc = _scsih_get_shost_and_ioc(pdev, &shost, &ioc); + if (rc) { + dev_err(&pdev->dev, "unable to suspend device\n"); + return rc; + } mpt3sas_base_stop_watchdog(ioc); mpt3sas_base_stop_hba_unplug_watchdog(ioc); flush_scheduled_work(); @@ -10749,11 +10793,17 @@ scsih_suspend(struct pci_dev *pdev, pm_message_t state) static int scsih_resume(struct pci_dev *pdev) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; pci_power_t device_state = pdev->current_state; int r; + r = _scsih_get_shost_and_ioc(pdev, &shost, &ioc); + if (r) { + dev_err(&pdev->dev, "unable to resume device\n"); + return r; + } + pr_info(MPT3SAS_FMT "pdev=0x%p, slot=%s, previous operating state [D%d]\n", ioc->name, pdev, pci_name(pdev), device_state); @@ -10786,9 +10836,13 @@ scsih_resume(struct pci_dev *pdev) static pci_ers_result_t scsih_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; + if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) { + dev_err(&pdev->dev, "device unavailable\n"); + return PCI_ERS_RESULT_DISCONNECT; + } pr_info(MPT3SAS_FMT "PCI error: detected callback, state(%d)!!\n", ioc->name, state); @@ -10825,10 +10879,14 @@ scsih_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) static pci_ers_result_t scsih_pci_slot_reset(struct pci_dev *pdev) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; int rc; + if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) { + dev_err(&pdev->dev, "unable to perform slot reset\n"); + return PCI_ERS_RESULT_DISCONNECT; + } pr_info(MPT3SAS_FMT "PCI error: slot reset callback!!\n", ioc->name); @@ -10861,9 +10919,13 @@ scsih_pci_slot_reset(struct pci_dev *pdev) static void scsih_pci_resume(struct pci_dev *pdev) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; + if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) { + dev_err(&pdev->dev, "unable to resume device\n"); + return; + } pr_info(MPT3SAS_FMT "PCI error: resume callback!!\n", ioc->name); pci_cleanup_aer_uncorrect_error_status(pdev); @@ -10879,9 +10941,13 @@ scsih_pci_resume(struct pci_dev *pdev) static pci_ers_result_t scsih_pci_mmio_enabled(struct pci_dev *pdev) { - struct Scsi_Host *shost = pci_get_drvdata(pdev); - struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); + struct Scsi_Host *shost = NULL; + struct MPT3SAS_ADAPTER *ioc = NULL; + if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) { + dev_err(&pdev->dev, "unable to enable mmio\n"); + return PCI_ERS_RESULT_DISCONNECT; + } pr_info(MPT3SAS_FMT "PCI error: mmio enabled callback!!\n", ioc->name);