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Mon, 26 Feb 2018 10:07:40 -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> <22270a6a-44fb-d2ad-d6d3-3d301bdde26e@huawei.com> <1519657365.10722.187.camel@linux.intel.com> CC: , , From: John Garry Message-ID: <98039a90-cbf2-6d76-bdb5-56c8e83f6470@huawei.com> Date: Mon, 26 Feb 2018 15:07:11 +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: <1519657365.10722.187.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 15:02, Andy Shevchenko wrote: > On Mon, 2018-02-26 at 13:15 +0000, John Garry wrote: >> 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). > > Is that code already in upstream? No, not yet. > > If no, please, Cc next version to me and possible Mika. Of course. I should be sending it later today. > All the best, John