From patchwork Sat Jun 6 00:35:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 199499 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=-17.4 required=3.0 tests=DKIMWL_WL_MED, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 88DD0C433DF for ; Sat, 6 Jun 2020 00:36:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62466207DF for ; Sat, 6 Jun 2020 00:36:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="hDabG4zj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728624AbgFFAgA (ORCPT ); Fri, 5 Jun 2020 20:36:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728517AbgFFAf7 (ORCPT ); Fri, 5 Jun 2020 20:35:59 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10D2FC08C5C3 for ; Fri, 5 Jun 2020 17:35:59 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id z7so13858002ybn.21 for ; Fri, 05 Jun 2020 17:35:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=yfWV0PXIV5PpQ5wJBNut7KX55zaCQiiUSrjbwEbMGQE=; b=hDabG4zjcTPcxEXraRYdCV5IGq5A5N+2z/Kwosmi2e8VE0UeXfqNaXSzz9G1/2Lfrs 1gfGPtg/SSbtaU7GYKC+lIhWX9tVXm1SXXD77ml3Mx1DF7zKbQAMU/LRwE1N+qF0gIqx 6F4QneK92uZu516vUeWP0nRO7ZincYWZbqwD2AAX1qLItxpazt+PGZXqocwLlomvxT6k 4lDCdyOJGrqCPSajxsGxkdybLsL+jo3hGIH+mXXZIuK5gVBMPFCXDcjsPCCN8AKdwokU mrDzmx/c2B8wI5DOhyAbOLqerxHD1Ve1E+5eCi+ChberuGBbwRecPbox5uKUr+oZdGHk 6cdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=yfWV0PXIV5PpQ5wJBNut7KX55zaCQiiUSrjbwEbMGQE=; b=JAz/gyvzBiS9VzW9wNP1jt3ibwdYJOLmZcdPelkCL1lZTSDp/iIdenmpT62pxZ+qr1 iV7aJgdYgpro1sK2eKH/o328osSrwcqRtW/eBmvc1m9ZtQD4CQ1KLzfJfR7KcSlyECqE 27G55NHlt90JTuR7L9K3dYZIJIOMlaoJUogvYytVUvm+pU1U8hZq2bApCwXxM8eV3XZe eFAClY5Q8chzNA017buHoaQ8U9lipvZPnl85L75khylZJLk4N+xZejdljw38t9zuw48g ezCVtxYsTb4VBgixZaUKuxXcp7itXCKxl8cR86/9A1HOwUpGv8/iyx1uCi4NomOnUbZm PMmA== X-Gm-Message-State: AOAM53063IhklQbCMegTlFyxWpy9Ei/t5iKTUwqkAIQ9pIl87Hp3TmDM ia6ji1Ew/DCxjpT4hvl6vkK0J9dkisqxrcU= X-Google-Smtp-Source: ABdhPJyamEg7iPPMO/P4Ajg/c05XHJ4f4AwNLvmL3Kp8Mx8OKK5lAA5mkRGzah80mh3MNvTlFcsjfT0ggbfnvfc= X-Received: by 2002:a25:2d24:: with SMTP id t36mr20076041ybt.426.1591403758190; Fri, 05 Jun 2020 17:35:58 -0700 (PDT) Date: Fri, 5 Jun 2020 17:35:51 -0700 In-Reply-To: <20200606003552.247693-1-saravanak@google.com> Message-Id: <20200606003552.247693-2-saravanak@google.com> Mime-Version: 1.0 References: <20200606003552.247693-1-saravanak@google.com> X-Mailer: git-send-email 2.27.0.278.ge193c7cf3a9-goog Subject: [PATCH v1 1/2] driver core: Add device_is_dependent() to linux/device.h From: Saravana Kannan To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Rob Herring , Frank Rowand Cc: Saravana Kannan , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, John Stultz , kernel-team@android.com Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org DT implementation of fw_devlink needs this function to detect cycles. So make it available. Signed-off-by: Saravana Kannan --- drivers/base/core.c | 2 +- include/linux/device.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index 139cdf7e7327..509b13610b56 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -118,7 +118,7 @@ int device_links_read_lock_held(void) * Check if @target depends on @dev or any device dependent on it (its child or * its consumer etc). Return 1 if that is the case or 0 otherwise. */ -static int device_is_dependent(struct device *dev, void *target) +int device_is_dependent(struct device *dev, void *target) { struct device_link *link; int ret; diff --git a/include/linux/device.h b/include/linux/device.h index ac8e37cd716a..5c618effc51e 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -829,6 +829,7 @@ extern int device_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid); extern const char *device_get_devnode(struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid, const char **tmp); +extern int device_is_dependent(struct device *dev, void *target); static inline bool device_supports_offline(struct device *dev) {