From patchwork Thu Jan 12 03:41:16 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 9512001 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2F60A60710 for ; Thu, 12 Jan 2017 03:42:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 207F62864B for ; Thu, 12 Jan 2017 03:42:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 12E832865F; Thu, 12 Jan 2017 03:42:25 +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=-4.1 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C650F2864B for ; Thu, 12 Jan 2017 03:42:24 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cRWHP-0007KX-Kd; Thu, 12 Jan 2017 03:42:23 +0000 Received: from mail-oi0-x242.google.com ([2607:f8b0:4003:c06::242]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cRWHC-00073a-Iu for linux-arm-kernel@lists.infradead.org; Thu, 12 Jan 2017 03:42:12 +0000 Received: by mail-oi0-x242.google.com with SMTP id u143so1126937oif.3 for ; Wed, 11 Jan 2017 19:41:57 -0800 (PST) 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; bh=bYYV2RnTwU/f2RxlkK6ng0Xxnov7Y4Vc/sCye+4hpp0=; b=uv3r3A+ixNm5dq5u2LorZCL2kcgj1aPpe63j1MsjRWCcLWcWUwFh1WM4vxZmVdExYO GYifPDsjvnxojarvlqvnzLshH6KhgoKR7BgrkQ5g4KyUsZ6xq07QenOmJrRFJsad5EHM 8zLfk1gwj0EIfpMALno1Cx9kL4apPB1EsH/WpclSZpFf0tb/bnuprdiclJgNXngUkSJ2 zpdcYFNcrhfYn6dP6hc1wMLheKIBL2Mj1494ZrgxAnn49lS5SuFNuUwjrYEe5slwwGK1 h+mg9XkS0pWALgHX746OAvqQc4xqUsjiCOZEgX9MX2q6R9eThrpEDSEnSY08Si8oGgGJ gMug== 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=bYYV2RnTwU/f2RxlkK6ng0Xxnov7Y4Vc/sCye+4hpp0=; b=T29o7Hl+gkTCgA1Doms6ei62CPi5ns56dugWNno8NUcHqBqkA0q/8IZCwuXmk/Qbyl pG9vmQ6+9UMzerZ5bzAGLaLIOT9FtjS0gwHizAfnhLZ1ZfUKuKi/9h4jQOOeIUwURe2R 31b75qQQXqiUG0Uxg0YPMYr7ZjuExHt0ASmft33ICqiMkdDUyP1R+U9AzklHjswBfETZ 6CjSwN3QBpJ1uzo0Vvi0CIh/F90+d4wJNrnrTlf1CLYNcoeJBMJ9/keAbcmm3xPsxbGK 5cyl7bQ9Y/tK2Yzocy9NRsC14+VqC+T+Yep/pXt87WkMZwxcrSzjhphJihYu08zBHm2m rh5Q== X-Gm-Message-State: AIkVDXJvB3p45E9W41P2RWN9sJMyF72lAQG+p+cNiM7OtYvSNpyDU/kEhDmivz41vCOVGw== X-Received: by 10.157.29.251 with SMTP id w56mr5183134otw.13.1484192516593; Wed, 11 Jan 2017 19:41:56 -0800 (PST) Received: from fainelli-laptop.lan ([2001:470:d:73f:b16f:f382:be58:4136]) by smtp.gmail.com with ESMTPSA id f7sm3585543otb.34.2017.01.11.19.41.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Jan 2017 19:41:56 -0800 (PST) From: Florian Fainelli To: netdev@vger.kernel.org Subject: [PATCH net-next v2 05/10] drivers: base: Add device_find_class() Date: Wed, 11 Jan 2017 19:41:16 -0800 Message-Id: <20170112034121.27697-6-f.fainelli@gmail.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170112034121.27697-1-f.fainelli@gmail.com> References: <20170112034121.27697-1-f.fainelli@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170111_194210_681750_82E5EA53 X-CRM114-Status: GOOD ( 11.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Lunn , Florian Fainelli , Jason Cooper , Vivien Didelot , gregkh@linuxfoundation.org, Russell King , open list , Gregory Clement , "David S. Miller" , "moderated list:ARM SUB-ARCHITECTURES" , Sebastian Hesselbarth MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add a helper function to lookup a device reference given a class name. This is a preliminary patch to remove adhoc code from net/dsa/dsa.c and make it more generic. Signed-off-by: Florian Fainelli --- drivers/base/core.c | 19 +++++++++++++++++++ include/linux/device.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index 020ea7f05520..3dd6047c10d8 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -2065,6 +2065,25 @@ struct device *device_find_child(struct device *parent, void *data, } EXPORT_SYMBOL_GPL(device_find_child); +static int dev_is_class(struct device *dev, void *class) +{ + if (dev->class != NULL && !strcmp(dev->class->name, class)) + return 1; + + return 0; +} + +struct device *device_find_class(struct device *parent, char *class) +{ + if (dev_is_class(parent, class)) { + get_device(parent); + return parent; + } + + return device_find_child(parent, class, dev_is_class); +} +EXPORT_SYMBOL_GPL(device_find_class); + int __init devices_init(void) { devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL); diff --git a/include/linux/device.h b/include/linux/device.h index 491b4c0ca633..8d37f5ecb972 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -1120,6 +1120,7 @@ extern int device_for_each_child_reverse(struct device *dev, void *data, int (*fn)(struct device *dev, void *data)); extern struct device *device_find_child(struct device *dev, void *data, int (*match)(struct device *dev, void *data)); +extern struct device *device_find_class(struct device *parent, char *class); extern int device_rename(struct device *dev, const char *new_name); extern int device_move(struct device *dev, struct device *new_parent, enum dpm_order dpm_order);