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 BA375C742D2 for ; Fri, 12 Jul 2019 23:53:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8DCF420874 for ; Fri, 12 Jul 2019 23:53:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="vBSRrli9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728677AbfGLXxQ (ORCPT ); Fri, 12 Jul 2019 19:53:16 -0400 Received: from mail-vk1-f201.google.com ([209.85.221.201]:34323 "EHLO mail-vk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728630AbfGLXxJ (ORCPT ); Fri, 12 Jul 2019 19:53:09 -0400 Received: by mail-vk1-f201.google.com with SMTP id g68so1362995vkb.1 for ; Fri, 12 Jul 2019 16:53:09 -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=CAlHJy5+PE+GUC+yGE/HoGyC126T/YkJLT0emjsVwvg=; b=vBSRrli97XKmYjaFIGkTrcpCdCNGuE+h8IhFrSjimPFbqLeAsD6MGB4jNFhsSO9U16 aO7Hsb3DRlpZOw7nW7ieuCskwIYYeq4G9U9Dc4U6kCs6M4zxBv4owXK9H/L870Onwxyf Eb1rfA+W2CsEK33teA2bvZH4zYIXX4TxdFtbSRVakoxy1siyL2ZEMCCh4Dj5ajB3Z1DW Knm77sDEisIgodbyts3qx9jkiRdo4T2aotiJnFF5XbFfJnCtGYjsLoJh5/v4zTZFQZIf 4qDSWvdPfYiUQj6h9dF5/U8AA1a8iBbFTjoB0iGNbPtwSHYVIVJNarpjiaR8y3iHb3t2 IOWQ== 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=CAlHJy5+PE+GUC+yGE/HoGyC126T/YkJLT0emjsVwvg=; b=iYftUcrccZe1veVfMK+9krSGyX8vAy9W7lDcfLyp52LzacFVvFdgn9zvcGfg6hJUKV faFPv1g9w71ClEUUEOitjBD8SxvHutrIXcnDsg9hnJ/q9J+mSsGgFBZgmYE8kmx8bUjv zp6nVkkg82wpk6apGgrl/LHIUGpNhN0FOOVG/QNZt+ybr0Rcv4aTCSAy+ec9aVVpUp9a ODQnk+NmnhIM2kPQ+vxGd8sxrFApH+sgwuqx0J1IoozEm/yY37HfMd2oZndMUHVSj2N7 nwWsaEv1F831VBVNOimhTmfdCsiSnLvlCqkTNbcWpABIL4Vwsd5xqYL++1bJ4STEWax3 zdRw== X-Gm-Message-State: APjAAAU6bP0lvkokNTd7w4G72nwf7H6JlVTForCe/SyW2SFJqTqyEA0X 4zf0CkjEzQ+sCxjbVQkQk38bI5c8W9UNJc4= X-Google-Smtp-Source: APXvYqzwP48zLLPRZS7QmxTr3oncKEyLjcgCl8Hybw1d/cNDtpOqX9dKb2Tc4NdPmWjX/kIB8o1avR2Bs7ubFXg= X-Received: by 2002:ab0:2556:: with SMTP id l22mr10397175uan.46.1562975588442; Fri, 12 Jul 2019 16:53:08 -0700 (PDT) Date: Fri, 12 Jul 2019 16:52:39 -0700 In-Reply-To: <20190712235245.202558-1-saravanak@google.com> Message-Id: <20190712235245.202558-7-saravanak@google.com> Mime-Version: 1.0 References: <20190712235245.202558-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.510.g264f2c817a-goog Subject: [PATCH v5 06/11] 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); -- 2.22.0.510.g264f2c817a-goog