From patchwork Thu Oct 15 15:39:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 7407371 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 73E1E9F302 for ; Thu, 15 Oct 2015 15:42:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 86911207FD for ; Thu, 15 Oct 2015 15:42:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 508A02085C for ; Thu, 15 Oct 2015 15:42:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753649AbbJOPmD (ORCPT ); Thu, 15 Oct 2015 11:42:03 -0400 Received: from foss.arm.com ([217.140.101.70]:36737 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753403AbbJOPjg (ORCPT ); Thu, 15 Oct 2015 11:39:36 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6A65831E; Thu, 15 Oct 2015 08:39:33 -0700 (PDT) Received: from approximate.cambridge.arm.com (approximate.cambridge.arm.com [10.1.209.125]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 186E73F49B; Thu, 15 Oct 2015 08:39:34 -0700 (PDT) From: Marc Zyngier To: Thomas Gleixner , Jiang Liu , Jason Cooper Cc: Ma Jun , , , Subject: [PATCH RFC 2/7] platform-msi: Factor out allocation/free of private data Date: Thu, 15 Oct 2015 16:39:23 +0100 Message-Id: <1444923568-17413-3-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1444923568-17413-1-git-send-email-marc.zyngier@arm.com> References: <1444923568-17413-1-git-send-email-marc.zyngier@arm.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP As we're going to have multiple paths to allocate/free the platform-msi private data, factor this out into separate utility functions. Signed-off-by: Marc Zyngier --- drivers/base/platform-msi.c | 84 ++++++++++++++++++++++++++------------------- 1 file changed, 48 insertions(+), 36 deletions(-) diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index 6148c78..92666cd 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -189,21 +189,11 @@ struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode, return domain; } -/** - * platform_msi_domain_alloc_irqs - Allocate MSI interrupts for @dev - * @dev: The device for which to allocate interrupts - * @nvec: The number of interrupts to allocate - * @write_msi_msg: Callback to write an interrupt message for @dev - * - * Returns: - * Zero for success, or an error code in case of failure - */ -int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec, - irq_write_msi_msg_t write_msi_msg) +static int platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec, + irq_write_msi_msg_t write_msi_msg, + struct platform_msi_priv_data **data) { - struct platform_msi_priv_data *priv_data; - int err; - + struct platform_msi_priv_data *datap; /* * Limit the number of interrupts to 256 per device. Should we * need to bump this up, DEV_ID_SHIFT should be adjusted @@ -222,22 +212,51 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec, if (!list_empty(dev_to_msi_list(dev))) return -EBUSY; - priv_data = kzalloc(sizeof(*priv_data), GFP_KERNEL); - if (!priv_data) + datap = *data = kzalloc(sizeof(**data), GFP_KERNEL); + if (!datap) return -ENOMEM; - priv_data->devid = ida_simple_get(&platform_msi_devid_ida, - 0, 1 << DEV_ID_SHIFT, GFP_KERNEL); - if (priv_data->devid < 0) { - err = priv_data->devid; - goto out_free_data; + datap->devid = ida_simple_get(&platform_msi_devid_ida, + 0, 1 << DEV_ID_SHIFT, GFP_KERNEL); + if (datap->devid < 0) { + int err = datap->devid; + kfree(*data); + return err; } - priv_data->write_msg = write_msi_msg; + datap->write_msg = write_msi_msg; + + return 0; +} + +static void platform_msi_free_priv_data(struct platform_msi_priv_data *data) +{ + ida_simple_remove(&platform_msi_devid_ida, data->devid); + kfree(data); +} + +/** + * platform_msi_domain_alloc_irqs - Allocate MSI interrupts for @dev + * @dev: The device for which to allocate interrupts + * @nvec: The number of interrupts to allocate + * @write_msi_msg: Callback to write an interrupt message for @dev + * + * Returns: + * Zero for success, or an error code in case of failure + */ +int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec, + irq_write_msi_msg_t write_msi_msg) +{ + struct platform_msi_priv_data *priv_data; + int err; + + err = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg, &priv_data); + if (err) + return err; err = platform_msi_alloc_descs(dev, nvec, priv_data); if (err) - goto out_free_id; + goto out_free_priv_data; err = msi_domain_alloc_irqs(dev->msi_domain, dev, nvec); if (err) @@ -247,10 +266,8 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec, out_free_desc: platform_msi_free_descs(dev, 0, nvec); -out_free_id: - ida_simple_remove(&platform_msi_devid_ida, priv_data->devid); -out_free_data: - kfree(priv_data); +out_free_priv_data: + platform_msi_free_priv_data(priv_data); return err; } @@ -261,16 +278,11 @@ out_free_data: */ void platform_msi_domain_free_irqs(struct device *dev) { - struct msi_desc *desc; - - desc = first_msi_entry(dev); - if (desc) { - struct platform_msi_priv_data *data; - - data = desc->platform.msi_priv_data; + if (!list_empty(dev_to_msi_list(dev))) { + struct msi_desc *desc; - ida_simple_remove(&platform_msi_devid_ida, data->devid); - kfree(data); + desc = first_msi_entry(dev); + platform_msi_free_priv_data(desc->platform.msi_priv_data); } msi_domain_free_irqs(dev->msi_domain, dev);