From patchwork Wed Oct 14 14:41:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 285703 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=-9.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=unavailable 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 9DCA2C43467 for ; Wed, 14 Oct 2020 14:42:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62FE822203 for ; Wed, 14 Oct 2020 14:42:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="FkHHq+IJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726269AbgJNOmK (ORCPT ); Wed, 14 Oct 2020 10:42:10 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:52917 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729032AbgJNOmK (ORCPT ); Wed, 14 Oct 2020 10:42:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602686529; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PlJoLtIpkVOz1qyb1zjr6+0JD61+zNOgWz6cLK2byzI=; b=FkHHq+IJRWS8lvsJPmqlOyWWJDWZAaJHkKq9kGWCFEgTWRNHjCEamnrxyAkrWeLDUjrn/Y 6hXtWsevq5kxu8fuD3I+22+R2N6UmicnelM37/XM40p+g6Md/cJinValoI5TM6vus1Emb8 s/CC15KbS5/QHtmDft+YNyQuVzBKv3s= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-1-X78Fyf9RO3q9XwTFpdIA2w-1; Wed, 14 Oct 2020 10:42:06 -0400 X-MC-Unique: X78Fyf9RO3q9XwTFpdIA2w-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6F5421021213; Wed, 14 Oct 2020 14:42:04 +0000 (UTC) Received: from x1.localdomain (ovpn-112-126.ams2.redhat.com [10.36.112.126]) by smtp.corp.redhat.com (Postfix) with ESMTP id 90CFC6EF7B; Wed, 14 Oct 2020 14:42:02 +0000 (UTC) From: Hans de Goede To: Wolfram Sang , Mika Westerberg , Greg Kroah-Hartman Cc: Hans de Goede , Kieran Bingham , Maximilian Luz , stable@vger.kernel.org, linux-i2c@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH 5.8+ regression fix] i2c: core: Restore acpi_walk_dep_device_list() getting called after registering the ACPI i2c devs Date: Wed, 14 Oct 2020 16:41:58 +0200 Message-Id: <20201014144158.18036-2-hdegoede@redhat.com> In-Reply-To: <20201014144158.18036-1-hdegoede@redhat.com> References: <20201014144158.18036-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Commit 21653a4181ff ("i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices()")'s intention was to only move the acpi_install_address_space_handler() call to the point before where the ACPI declared i2c-children of the adapter where instantiated by i2c_acpi_register_devices(). But i2c_acpi_install_space_handler() had a call to acpi_walk_dep_device_list() hidden (that is I missed it) at the end of it, so as an unwanted side-effect now acpi_walk_dep_device_list() was also being called before i2c_acpi_register_devices(). Move the acpi_walk_dep_device_list() call to the end of i2c_acpi_register_devices(), so that it is once again called *after* the i2c_client-s hanging of the adapter have been created. This fixes the Microsoft Surface Go 2 hanging at boot. Fixes: 21653a4181ff ("i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices()") Suggested-by: Maximilian Luz Reported-and-tested-by: Kieran Bingham Signed-off-by: Hans de Goede --- drivers/i2c/i2c-core-acpi.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index e627d7b2790f..37c510d9347a 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -264,6 +264,7 @@ static acpi_status i2c_acpi_add_device(acpi_handle handle, u32 level, void i2c_acpi_register_devices(struct i2c_adapter *adap) { acpi_status status; + acpi_handle handle; if (!has_acpi_companion(&adap->dev)) return; @@ -274,6 +275,15 @@ void i2c_acpi_register_devices(struct i2c_adapter *adap) adap, NULL); if (ACPI_FAILURE(status)) dev_warn(&adap->dev, "failed to enumerate I2C slaves\n"); + + if (!adap->dev.parent) + return; + + handle = ACPI_HANDLE(adap->dev.parent); + if (!handle) + return; + + acpi_walk_dep_device_list(handle); } static const struct acpi_device_id i2c_acpi_force_400khz_device_ids[] = { @@ -719,7 +729,6 @@ int i2c_acpi_install_space_handler(struct i2c_adapter *adapter) return -ENOMEM; } - acpi_walk_dep_device_list(handle); return 0; }