From mboxrd@z Thu Jan 1 00:00:00 1970 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 3E362C606CF for ; Mon, 8 Jul 2019 22:56:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 104732173E for ; Mon, 8 Jul 2019 22:56:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="WGI50DdY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728820AbfGHW4u (ORCPT ); Mon, 8 Jul 2019 18:56:50 -0400 Received: from mail-qt1-f202.google.com ([209.85.160.202]:33332 "EHLO mail-qt1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728708AbfGHW4s (ORCPT ); Mon, 8 Jul 2019 18:56:48 -0400 Received: by mail-qt1-f202.google.com with SMTP id y19so17792192qtm.0 for ; Mon, 08 Jul 2019 15:56:47 -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=u1eu5Q6qNnosVNL7ZS50tOQF+TSWAKuZjVys5X8lD3k=; b=WGI50DdYYx+Uhgt7xYtokHpc+GBb8ht5o/y+/bOew2g9L4TI3CIL3otG9zQBwG6pKj zBvvqcnXmdQCddkCO/0mOEPYwl9XkVTHDBHJuaONn/jcEploVqB982SvtJfhJDl3N4EW rUeKytatMYLpHjrJzjLXjhDqCD7ctM+rz+QhWCPVBClBTxexTGKq4ebLdaxj24Yeja1q nF2tTDG1LOJM3yZ+iNYLO+ZtUfvlpGWE8r0DoX8gnlg0I5IFtu7ttKm0zlx7iRJ5drwz MY8eQP5HUaL5wYrnjGk6eM9KQcQLQ8xqTtKsjluRJVNASqwF8D2gNDvxLaREzs4/mNke d7zg== 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=u1eu5Q6qNnosVNL7ZS50tOQF+TSWAKuZjVys5X8lD3k=; b=Zlhzi/MpguxhO43sJoHSG/BSLxMx0m9zLptBmAYgLQt8dMe+DUgph6/DXfz48AKwEb auxCwGHeLrchP/wtkoq6MLP8961mFLW1GIjqLgH8tBVX7JGSAJ9KyL1PiTtr8ROjh540 R5I5C28hZdZ9+CG3X1PYzfdq0uwizfSMiYQiHlxETVGOr7ItalVNF9avykCOWq6vmqlv MNdPt+W3jJ2VfWzOQQwtvH3rukqRlk+5FPbiqpLJeokwg6j9242oX1Z/ncVkg5JcEhrx NtFJQ9H37I5uCbIBJqyIBgFEUEpJJqxaW5pQVCGjtV9Bej9piyDFHXEzlOfM05NeL5S+ Sz1w== X-Gm-Message-State: APjAAAX4DNt9ZUZlE/+M+UOR0S09TRqscHwBlsLZC/ONVrLzg7BaS0wQ 0Jj3JH6IOaGgyT8IcsLjF5p1F+SzczTC4tM= X-Google-Smtp-Source: APXvYqwvRo+4i76hVWIzQ54oOss1Uos7FRzSKKQK6Nv32bMLUcRsIH63nzjSOE5keCoHd7ixFyLGNDMc2TWbAtM= X-Received: by 2002:a37:4c4e:: with SMTP id z75mr16269072qka.230.1562626607478; Mon, 08 Jul 2019 15:56:47 -0700 (PDT) Date: Mon, 8 Jul 2019 15:56:22 -0700 In-Reply-To: <20190708225624.119973-1-saravanak@google.com> Message-Id: <20190708225624.119973-7-saravanak@google.com> Mime-Version: 1.0 References: <20190708225624.119973-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v4 6/8] of/platform: Pause/resume sync state in of_platform_populate() From: Saravana Kannan To: Rob Herring , Mark Rutland , Greg Kroah-Hartman , "Rafael J. Wysocki" , Frank Rowand Cc: Saravana Kannan , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, David Collins , kernel-team@android.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When multiple child devices are populated using of_platform_populate() after kernel init, there could be supplier-consumer dependencies between the child devices. Wait for all the devices to be added and linked before calling sync_state() on all the suppliers. Signed-off-by: Saravana Kannan --- drivers/of/platform.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 56b718f09929..dba962a0ee50 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -486,6 +486,7 @@ int of_platform_populate(struct device_node *root, pr_debug("%s()\n", __func__); pr_debug(" starting at: %pOF\n", root); + device_links_supplier_sync_state_pause(); for_each_child_of_node(root, child) { rc = of_platform_bus_create(child, matches, lookup, parent, true); if (rc) { @@ -493,6 +494,8 @@ int of_platform_populate(struct device_node *root, break; } } + device_links_supplier_sync_state_resume(); + of_node_set_flag(root, OF_POPULATED_BUS); of_node_put(root); -- 2.22.0.410.gd8fdbe21b5-goog