From patchwork Thu Oct 1 12:25:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vaibhav Gupta X-Patchwork-Id: 11811399 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1DDE8112C for ; Thu, 1 Oct 2020 12:31:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED37621707 for ; Thu, 1 Oct 2020 12:31:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="SMCaefO+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732401AbgJAMbv (ORCPT ); Thu, 1 Oct 2020 08:31:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731936AbgJAMbv (ORCPT ); Thu, 1 Oct 2020 08:31:51 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34FB9C0613D0; Thu, 1 Oct 2020 05:31:51 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id x16so3942699pgj.3; Thu, 01 Oct 2020 05:31:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=yCf+5pBHtGakI8vGh3iG+XqVcPWuJKKA8L3HBDKw1hc=; b=SMCaefO+GDy2LTqmcPRkWQzQePduXz/8CGCTNsh/8EIR8JfCXCVnh2Cs1IaTM5UDKc gz0Nl37bLENTFOZGFkklP8NUuiW+iwPxpXjr3R7XCT0hX56VqUVK3c1uDfigpK+8CdOz QNGOhCEDX0kytXW6hnYuRWbTPi342VGN+FtmWBxcSm1ikbfJ2IDIaUrayFC90L7r2R+l WQ13Kr+71cPKp/EqDKJDbhnfYB7tPkQ88LCmVyGRGQy8KDNF2JB5KSLSaeE9/dMBzb8E sxzSVZJhZlEk1Cml4/GrkMV4DXn8SpuiMWvYuFXHlhNGzP1gIgeEhWYddpHm2d3E1/pF 24Fg== 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:mime-version:content-transfer-encoding; bh=yCf+5pBHtGakI8vGh3iG+XqVcPWuJKKA8L3HBDKw1hc=; b=jmoqNMDr7htAB4XMRZDtwC/VuBZdVc4XMG/rRgW2hE7+PGPThN5oVakiIk+LRpS2jD 8CtFa3IDwgrxCW0ru10dOnLLZWYlOh0x3OMaxPKAqXZOSyE/LIzcCVMDA5cslK9IOc2Y mn2z1RnZAsII9i/Za1yrKP7f0f86vx0CN65qMgtqNn6x3QzIDAr7gUD8nM/tpjrtZnXU NANKhILZxQDYmJDgSzU+WlZrjjMUaYSIEoGZGg1inBmNffV3PJMHLKkBBuOUK27ktX1t Ybv8+cgsSb51fKQhHmi+xuc+klO8KKaaFznnIOtbHqnGRfGbRFNEPolPWeLGzKr1NrP2 wt9Q== X-Gm-Message-State: AOAM533e5xipjFDkvwz5nCuVqWebuMaYYYVf6RMO7XMQuniSgFxFfXUg jNi0pc8lz618HRaBTOkGsC8= X-Google-Smtp-Source: ABdhPJyaWJwo00IH02FqAlYVk3iDFt3m09OedfhK544ZN2l6gEpfDhkFeia4cyHlU5Y/1x6rQ0Zh9A== X-Received: by 2002:a63:d648:: with SMTP id d8mr5912533pgj.4.1601555510725; Thu, 01 Oct 2020 05:31:50 -0700 (PDT) Received: from varodek.localdomain ([171.61.143.130]) by smtp.gmail.com with ESMTPSA id m13sm5695199pjl.45.2020.10.01.05.31.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Oct 2020 05:31:50 -0700 (PDT) From: Vaibhav Gupta To: Bjorn Helgaas , Bjorn Helgaas , Bjorn Helgaas , Vaibhav Gupta , Adam Radford , "James E.J. Bottomley" , "Martin K. Petersen" , Adaptec OEM Raid Solutions , Hannes Reinecke , Bradley Grove , John Garry , Don Brace , James Smart , Dick Kennedy , Kashyap Desai , Sumit Saxena , Shivasharan S , Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani , Jack Wang Cc: Vaibhav Gupta , Shuah Khan , linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, linux-scsi@vger.kernel.org, esc.storagedev@microsemi.com, megaraidlinux.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com Subject: [PATCH v3 23/28] scsi: 3w-sas: use generic power management Date: Thu, 1 Oct 2020 17:55:06 +0530 Message-Id: <20201001122511.1075420-24-vaibhavgupta40@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201001122511.1075420-1-vaibhavgupta40@gmail.com> References: <20201001122511.1075420-1-vaibhavgupta40@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Drivers should do only device-specific jobs. But in general, drivers using legacy PCI PM framework for .suspend()/.resume() have to manage many PCI PM-related tasks themselves which can be done by PCI Core itself. This brings extra load on the driver and it directly calls PCI helper functions to handle them. Switch to the new generic framework by updating function signatures and define a "struct dev_pm_ops" variable to bind PM callbacks. Also, remove unnecessary calls to the PCI Helper functions along with the legacy .suspend & .resume bindings. Signed-off-by: Vaibhav Gupta --- drivers/scsi/3w-sas.c | 31 +++++++------------------------ 1 file changed, 7 insertions(+), 24 deletions(-) diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c index 0b4888199699..b8f1848ecef2 100644 --- a/drivers/scsi/3w-sas.c +++ b/drivers/scsi/3w-sas.c @@ -1756,11 +1756,10 @@ static void twl_remove(struct pci_dev *pdev) twl_device_extension_count--; } /* End twl_remove() */ -#ifdef CONFIG_PM /* This function is called on PCI suspend */ -static int twl_suspend(struct pci_dev *pdev, pm_message_t state) +static int __maybe_unused twl_suspend(struct device *dev) { - struct Scsi_Host *host = pci_get_drvdata(pdev); + struct Scsi_Host *host = dev_get_drvdata(dev); TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no); @@ -1779,31 +1778,18 @@ static int twl_suspend(struct pci_dev *pdev, pm_message_t state) /* Clear doorbell interrupt */ TWL_CLEAR_DB_INTERRUPT(tw_dev); - pci_save_state(pdev); - pci_disable_device(pdev); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - return 0; } /* End twl_suspend() */ /* This function is called on PCI resume */ -static int twl_resume(struct pci_dev *pdev) +static int __maybe_unused twl_resume(struct device *dev) { int retval = 0; + struct pci_dev *pdev = to_pci_dev(dev); struct Scsi_Host *host = pci_get_drvdata(pdev); TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no); - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - - retval = pci_enable_device(pdev); - if (retval) { - TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume"); - return retval; - } - - pci_set_master(pdev); pci_try_set_mwi(pdev); retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); @@ -1841,11 +1827,9 @@ static int twl_resume(struct pci_dev *pdev) out_disable_device: scsi_remove_host(host); - pci_disable_device(pdev); return retval; } /* End twl_resume() */ -#endif /* PCI Devices supported by this driver */ static struct pci_device_id twl_pci_tbl[] = { @@ -1854,16 +1838,15 @@ static struct pci_device_id twl_pci_tbl[] = { }; MODULE_DEVICE_TABLE(pci, twl_pci_tbl); +static SIMPLE_DEV_PM_OPS(twl_pm_ops, twl_suspend, twl_resume); + /* pci_driver initializer */ static struct pci_driver twl_driver = { .name = "3w-sas", .id_table = twl_pci_tbl, .probe = twl_probe, .remove = twl_remove, -#ifdef CONFIG_PM - .suspend = twl_suspend, - .resume = twl_resume, -#endif + .driver.pm = &twl_pm_ops, .shutdown = twl_shutdown };