From patchwork Mon May 24 18:50:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russ Weight X-Patchwork-Id: 12276819 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 E43E8C47084 for ; Mon, 24 May 2021 18:50:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C630A61415 for ; Mon, 24 May 2021 18:50:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232746AbhEXSwW (ORCPT ); Mon, 24 May 2021 14:52:22 -0400 Received: from mga06.intel.com ([134.134.136.31]:38093 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233109AbhEXSwW (ORCPT ); Mon, 24 May 2021 14:52:22 -0400 IronPort-SDR: qxvmaDjblpvbNaFb47WQFExjsaLp2AwgTR7XdLv9NDR2GpFu7CcZA80JKSFiILDLS5yOkRHduO +MTOlOtqvy9Q== X-IronPort-AV: E=McAfee;i="6200,9189,9993"; a="263214829" X-IronPort-AV: E=Sophos;i="5.82,325,1613462400"; d="scan'208";a="263214829" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 May 2021 11:50:53 -0700 IronPort-SDR: U2psI/69G+XjjHh51rwSBlHS4Bgu2GPCE4VbXF8fpUQLQvP2wa9B6juHVQw3JK6ABki25jHA56 bg0lOqjs6rIg== X-IronPort-AV: E=Sophos;i="5.82,325,1613462400"; d="scan'208";a="476020727" Received: from rhweight-mobl2.amr.corp.intel.com (HELO rhweight-mobl2.ra.intel.com) ([10.212.182.29]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 May 2021 11:50:53 -0700 From: Russ Weight To: mdf@kernel.org, linux-fpga@vger.kernel.org Cc: trix@redhat.com, lgoncalv@redhat.com, yilun.xu@intel.com, hao.wu@intel.com, matthew.gerlach@intel.com, richard.gong@intel.com, Russ Weight Subject: [PATCH v3 3/3] fpga: region: Use standard dev_release for class driver Date: Mon, 24 May 2021 11:50:49 -0700 Message-Id: <20210524185049.681683-4-russell.h.weight@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210524185049.681683-1-russell.h.weight@intel.com> References: <20210524185049.681683-1-russell.h.weight@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org The FPGA region class driver data structure is being treated as a managed resource instead of using standard dev_release call-back to release the class data structure. This change removes the managed resource code and combines the create() and register() functions into a single register() function. Signed-off-by: Russ Weight --- v3: - Cleaned up comment header for fpga_region_register() - Fix fpga_region_register() error return on ida_simple_get() failure v2: - No changes --- drivers/fpga/dfl-fme-region.c | 10 +-- drivers/fpga/dfl.c | 10 +-- drivers/fpga/fpga-region.c | 103 ++++++------------------------- drivers/fpga/of-fpga-region.c | 10 +-- include/linux/fpga/fpga-region.h | 12 +--- 5 files changed, 32 insertions(+), 113 deletions(-) diff --git a/drivers/fpga/dfl-fme-region.c b/drivers/fpga/dfl-fme-region.c index 1eeb42af1012..631c8ce160e3 100644 --- a/drivers/fpga/dfl-fme-region.c +++ b/drivers/fpga/dfl-fme-region.c @@ -39,9 +39,9 @@ static int fme_region_probe(struct platform_device *pdev) if (IS_ERR(mgr)) return -EPROBE_DEFER; - region = devm_fpga_region_create(dev, mgr, fme_region_get_bridges); - if (!region) { - ret = -ENOMEM; + region = fpga_region_register(dev, mgr, fme_region_get_bridges); + if (IS_ERR(region)) { + ret = PTR_ERR(region); goto eprobe_mgr_put; } @@ -49,10 +49,6 @@ static int fme_region_probe(struct platform_device *pdev) region->compat_id = mgr->compat_id; platform_set_drvdata(pdev, region); - ret = fpga_region_register(region); - if (ret) - goto eprobe_mgr_put; - dev_dbg(dev, "DFL FME FPGA Region probed\n"); return 0; diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 511b20ff35a3..2fb3a5bfe4df 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -1400,9 +1400,9 @@ dfl_fpga_feature_devs_enumerate(struct dfl_fpga_enum_info *info) if (!cdev) return ERR_PTR(-ENOMEM); - cdev->region = devm_fpga_region_create(info->dev, NULL, NULL); - if (!cdev->region) { - ret = -ENOMEM; + cdev->region = fpga_region_register(info->dev, NULL, NULL); + if (IS_ERR(cdev->region)) { + ret = PTR_ERR(cdev->region); goto free_cdev_exit; } @@ -1410,10 +1410,6 @@ dfl_fpga_feature_devs_enumerate(struct dfl_fpga_enum_info *info) mutex_init(&cdev->lock); INIT_LIST_HEAD(&cdev->port_dev_list); - ret = fpga_region_register(cdev->region); - if (ret) - goto free_cdev_exit; - /* create and init build info for enumeration */ binfo = devm_kzalloc(info->dev, sizeof(*binfo), GFP_KERNEL); if (!binfo) { diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c index c3134b89c3fe..f65f60367e2c 100644 --- a/drivers/fpga/fpga-region.c +++ b/drivers/fpga/fpga-region.c @@ -180,39 +180,35 @@ static struct attribute *fpga_region_attrs[] = { ATTRIBUTE_GROUPS(fpga_region); /** - * fpga_region_create - alloc and init a struct fpga_region + * fpga_region_register - create and register a FPGA Region device * @dev: device parent * @mgr: manager that programs this region * @get_bridges: optional function to get bridges to a list * - * The caller of this function is responsible for freeing the resulting region - * struct with fpga_region_free(). Using devm_fpga_region_create() instead is - * recommended. - * - * Return: struct fpga_region or NULL + * Returns a struct fpga_region pointer on success, or ERR_PTR() on error. */ -struct fpga_region -*fpga_region_create(struct device *dev, - struct fpga_manager *mgr, - int (*get_bridges)(struct fpga_region *)) +struct fpga_region * +fpga_region_register(struct device *dev, struct fpga_manager *mgr, + int (*get_bridges)(struct fpga_region *)) { struct fpga_region *region; int id, ret = 0; region = kzalloc(sizeof(*region), GFP_KERNEL); if (!region) - return NULL; + return ERR_PTR(-ENOMEM); id = ida_simple_get(&fpga_region_ida, 0, 0, GFP_KERNEL); - if (id < 0) + if (id < 0) { + ret = id; goto err_free; + } region->mgr = mgr; region->get_bridges = get_bridges; mutex_init(®ion->mutex); INIT_LIST_HEAD(®ion->bridge_list); - device_initialize(®ion->dev); region->dev.class = fpga_region_class; region->dev.parent = dev; region->dev.of_node = dev->of_node; @@ -222,6 +218,12 @@ struct fpga_region if (ret) goto err_remove; + ret = device_register(®ion->dev); + if (ret) { + put_device(®ion->dev); + return ERR_PTR(ret); + } + return region; err_remove: @@ -229,76 +231,7 @@ struct fpga_region err_free: kfree(region); - return NULL; -} -EXPORT_SYMBOL_GPL(fpga_region_create); - -/** - * fpga_region_free - free a FPGA region created by fpga_region_create() - * @region: FPGA region - */ -void fpga_region_free(struct fpga_region *region) -{ - ida_simple_remove(&fpga_region_ida, region->dev.id); - kfree(region); -} -EXPORT_SYMBOL_GPL(fpga_region_free); - -static void devm_fpga_region_release(struct device *dev, void *res) -{ - struct fpga_region *region = *(struct fpga_region **)res; - - fpga_region_free(region); -} - -/** - * devm_fpga_region_create - create and initialize a managed FPGA region struct - * @dev: device parent - * @mgr: manager that programs this region - * @get_bridges: optional function to get bridges to a list - * - * This function is intended for use in a FPGA region driver's probe function. - * After the region driver creates the region struct with - * devm_fpga_region_create(), it should register it with fpga_region_register(). - * The region driver's remove function should call fpga_region_unregister(). - * The region struct allocated with this function will be freed automatically on - * driver detach. This includes the case of a probe function returning error - * before calling fpga_region_register(), the struct will still get cleaned up. - * - * Return: struct fpga_region or NULL - */ -struct fpga_region -*devm_fpga_region_create(struct device *dev, - struct fpga_manager *mgr, - int (*get_bridges)(struct fpga_region *)) -{ - struct fpga_region **ptr, *region; - - ptr = devres_alloc(devm_fpga_region_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return NULL; - - region = fpga_region_create(dev, mgr, get_bridges); - if (!region) { - devres_free(ptr); - } else { - *ptr = region; - devres_add(dev, ptr); - } - - return region; -} -EXPORT_SYMBOL_GPL(devm_fpga_region_create); - -/** - * fpga_region_register - register a FPGA region - * @region: FPGA region - * - * Return: 0 or -errno - */ -int fpga_region_register(struct fpga_region *region) -{ - return device_add(®ion->dev); + return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(fpga_region_register); @@ -316,6 +249,10 @@ EXPORT_SYMBOL_GPL(fpga_region_unregister); static void fpga_region_dev_release(struct device *dev) { + struct fpga_region *region = to_fpga_region(dev); + + ida_simple_remove(&fpga_region_ida, region->dev.id); + kfree(region); } /** diff --git a/drivers/fpga/of-fpga-region.c b/drivers/fpga/of-fpga-region.c index e405309baadc..466e083654ae 100644 --- a/drivers/fpga/of-fpga-region.c +++ b/drivers/fpga/of-fpga-region.c @@ -405,16 +405,12 @@ static int of_fpga_region_probe(struct platform_device *pdev) if (IS_ERR(mgr)) return -EPROBE_DEFER; - region = devm_fpga_region_create(dev, mgr, of_fpga_region_get_bridges); - if (!region) { - ret = -ENOMEM; + region = fpga_region_register(dev, mgr, of_fpga_region_get_bridges); + if (IS_ERR(region)) { + ret = PTR_ERR(region); goto eprobe_mgr_put; } - ret = fpga_region_register(region); - if (ret) - goto eprobe_mgr_put; - of_platform_populate(np, fpga_region_of_match, NULL, ®ion->dev); platform_set_drvdata(pdev, region); diff --git a/include/linux/fpga/fpga-region.h b/include/linux/fpga/fpga-region.h index 27cb706275db..ca793f43af14 100644 --- a/include/linux/fpga/fpga-region.h +++ b/include/linux/fpga/fpga-region.h @@ -37,15 +37,9 @@ struct fpga_region *fpga_region_class_find( int fpga_region_program_fpga(struct fpga_region *region); -struct fpga_region -*fpga_region_create(struct device *dev, struct fpga_manager *mgr, - int (*get_bridges)(struct fpga_region *)); -void fpga_region_free(struct fpga_region *region); -int fpga_region_register(struct fpga_region *region); +struct fpga_region * +fpga_region_register(struct device *dev, struct fpga_manager *mgr, + int (*get_bridges)(struct fpga_region *)); void fpga_region_unregister(struct fpga_region *region); -struct fpga_region -*devm_fpga_region_create(struct device *dev, struct fpga_manager *mgr, - int (*get_bridges)(struct fpga_region *)); - #endif /* _FPGA_REGION_H */