From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2853437-1519650930-2-12965856721524787840 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='com', MailFrom='org', XOriginatingCountry='UNK' X-Spam-charsets: plain='utf-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-serial-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1519650929; b=btcsj8sM9F6hP/nkyoa+N0nboEUIBHannUN1bNPDEVluJeW kHDpArEkEMIVawSiTcpyciFsgLzydoyBMUSYeZfzAIyXG3LIz6n7EcjzWPf2fR/z uYdYKby1MHuPmijAhCuRTM+8I/Nx8SIPFPwg1nUY04RPN4mxi5A4Z1/dpIxQiQ01 yLCl6qdyHAoAep7dcd4O6E9BIOdTOmUUdmBGKJm9e1/x/yop7o+o9U9bbt1RMrO7 SbQMz1PYFFE4HRgnoKvTessOQIAX+u6AYiM0i4XUh+a5R7vBTqho7A43yoBexW72 FL6g6oWHTFghK1r08QJJAvm+ZtkBluEFkg6BpHA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=subject:to:references:cc:from:message-id :date:mime-version:in-reply-to:content-type :content-transfer-encoding:sender:list-id; s=arctest; t= 1519650929; bh=ZgXAuWNuIDFn7qhrDqOcxJj8ZEDUvfsmPS/xbHDMi1w=; b=r JEQdIUtsKaEl5MSNpEnfXADeGCto+DSXXZhtiO8NyKlMYsYeZ8+yuRZU2yLp7L/F YxHsaTKbBsHZeJKCWO7uZxHJn2QGKoSaYkdPpjxaVtu1n3A06sjNretcEc7F1Pvh EQgWJRCuSe8L8Uc6meI1R2Lek/0c+hKmVedK1G2wH9tSu/hxRenltfVjmnVhydYu RglY0WSHR0uwDwwROPcAl45U9dXX3G5tTlZZKfUQE6/XPxUf1qEXFhHoXHq+mOBC rAvp0HloORu5BWa1NZ7T+jcu/PaKXyNXfgg9rwGsPkN8y2EnHLGMEdLiiZz57QPl UD/kOXiynH6OuLqz4oRBA== ARC-Authentication-Results: i=1; mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=huawei.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-serial-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=huawei.com header.result=pass header_is_org_domain=yes Authentication-Results: mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=huawei.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-serial-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=huawei.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753213AbeBZNP1 (ORCPT ); Mon, 26 Feb 2018 08:15:27 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:39786 "EHLO huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753039AbeBZNP0 (ORCPT ); Mon, 26 Feb 2018 08:15:26 -0500 Subject: Re: [RFC PATCH 0/2] serial: 8250_dw: IO space + polling mode support To: Andy Shevchenko , , , , , , References: <1519324923-196857-1-git-send-email-john.garry@huawei.com> <1519381801.10722.103.camel@linux.intel.com> <3c4c5f58-a661-13c8-cc1c-8d43828982cb@huawei.com> <1519407117.10722.124.camel@linux.intel.com> <88214a3e-82cc-c931-804c-7dc90fb8721f@huawei.com> <1519638828.10722.153.camel@linux.intel.com> <7221877b-a84a-63a1-ef86-1991f358df72@huawei.com> <1519644517.10722.179.camel@linux.intel.com> <1519647669.10722.184.camel@linux.intel.com> <1519648063.10722.185.camel@linux.intel.com> CC: , , From: John Garry Message-ID: <22270a6a-44fb-d2ad-d6d3-3d301bdde26e@huawei.com> Date: Mon, 26 Feb 2018 13:15:04 +0000 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: <1519648063.10722.185.camel@linux.intel.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.202.227.238] X-CFilter-Loop: Reflected Sender: linux-serial-owner@vger.kernel.org X-Mailing-List: linux-serial@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On 26/02/2018 12:27, Andy Shevchenko wrote: > On Mon, 2018-02-26 at 14:21 +0200, Andy Shevchenko wrote: >> On Mon, 2018-02-26 at 11:56 +0000, John Garry wrote: > > >>> Device (LPC0.CON0) { >>> Name (_HID, "HISI1031") > >>> // Name (_CID, "PNP0501") // cannot support PNP > > > One more question. What is the problem with this CID? Do you have a race > condition in enumeration? > Hi Andy, Not sure if race condition exactly. I tried enabling this CID and a pnp device is created in pnpacpi_add_device_handler(), while we have already marked the corresponding acpi_device to skip enumeration in ACPI scan handler (by flagging it as a serial bus slave). Thanks, John