From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=AnJR=XA=vger.kernel.org=linux-kernel-owner@kernel.org>
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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no
	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 D1AFFC00306
	for <linux-kernel@archiver.kernel.org>; Thu,  5 Sep 2019 14:53:49 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
	by mail.kernel.org (Postfix) with ESMTP id E36D620870
	for <linux-kernel@archiver.kernel.org>; Thu,  5 Sep 2019 14:53:49 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S2390123AbfIEOxs (ORCPT
        <rfc822;linux-kernel@archiver.kernel.org>);
        Thu, 5 Sep 2019 10:53:48 -0400
Received: from szxga07-in.huawei.com ([45.249.212.35]:47076 "EHLO huawei.com"
        rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP
        id S1726080AbfIEOxr (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 5 Sep 2019 10:53:47 -0400
Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.58])
        by Forcepoint Email with ESMTP id A22CFA20C1A2DEF0BBF8;
        Thu,  5 Sep 2019 22:53:43 +0800 (CST)
Received: from [127.0.0.1] (10.202.227.238) by DGGEMS403-HUB.china.huawei.com
 (10.3.19.203) with Microsoft SMTP Server id 14.3.439.0; Thu, 5 Sep 2019
 22:53:34 +0800
Subject: Re: PCI/kernel msi code vs GIC ITS driver conflict?
To:     Marc Zyngier <maz@kernel.org>,
        Andrew Murray <andrew.murray@arm.com>
References: <f5e948aa-e32f-3f74-ae30-31fee06c2a74@huawei.com>
 <5fd4c1cf-76c1-4054-3754-549317509310@kernel.org>
 <ef258ec7-877c-406a-3d88-80ff79b823f2@huawei.com>
 <20190904102537.GV9720@e119886-lin.cambridge.arm.com>
 <8f1c1fe6-c0d4-1805-b119-6a48a4900e6d@kernel.org>
 <84f6756f-79f2-2e46-fe44-9a46be69f99d@huawei.com>
 <651b4d5f-2d86-65dc-1232-580445852752@kernel.org>
 <8ac8e372-15a0-2f95-089c-c189b619ea62@huawei.com>
 <73c22eaa-172e-0fba-7a44-381106dee50d@kernel.org>
 <a73262e6-6ece-4946-896b-2dad5ca28417@huawei.com>
 <a90e6f99-cad3-8eda-dd08-0ab05ed9ca04@kernel.org>
 <ecdb638b-d5d3-efdc-becd-478ce6e6ff96@huawei.com>
 <e3a4a04a-4669-5a03-5115-84c6573b99e9@kernel.org>
CC:     Thomas Gleixner <tglx@linutronix.de>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Linux PCI <linux-pci@vger.kernel.org>,
        Linuxarm <linuxarm@huawei.com>,
        "luojiaxing@huawei.com" <luojiaxing@huawei.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
From:   John Garry <john.garry@huawei.com>
Message-ID: <d48c9e64-2a65-45a5-c61e-b69505531b1e@huawei.com>
Date:   Thu, 5 Sep 2019 15:53:29 +0100
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101
 Thunderbird/45.3.0
MIME-Version: 1.0
In-Reply-To: <e3a4a04a-4669-5a03-5115-84c6573b99e9@kernel.org>
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-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


>> >
>> > root@(none)$ echo 0000:74:02.0 > ./sys/bus/pci/drivers/hisi_sas_v3_hw/unbind
>> >
>> > <snip>
>> >
>> > [   34.806156] Freed devid 7410 LPI 0
>> > [   34.809555] Freed devid 7410 LPI 0
>> > [   34.812951] Freed devid 7410 LPI 0
>> > [   34.816344] Freed devid 7410 LPI 0
>> > [   34.819734] Freed devid 7410 LPI 0
>> > [   34.823122] Freed devid 7410 LPI 0
>> > [   34.826512] Freed devid 7410 LPI 0
>> > [   34.829901] Freed devid 7410 LPI 0
>> > [   34.833291] Freed devid 7410 LPI 0
>> > [   34.836680] Freed devid 7410 LPI 0
>> > [   34.840071] Freed devid 7410 LPI 0
>> > [   34.843461] Freed devid 7410 LPI 0
>> > [   34.846848] Freed devid 7410 LPI 0
>> > [   34.850238] Freed devid 7410 LPI 0
>> > [   34.853627] Freed devid 7410 LPI 0
>> > [   34.857017] Freed devid 7410 LPI 0
>> > [   34.860406] Freed devid 7410 LPI 0
>> > [   34.863797] Unmap devid 7410 shared 0 lpi_map
>> > [   34.868229] Unmap devid 7410
>> > root@(none)$
>> > root@(none)$
>> > root@(none)$ echo 0000:74:02.0 > ./sys/bus/pci/drivers/hisi_sas_v3_hw/bind
>> > [   39.158802] scsi host0: hisi_sas_v3_hw
>> > [   40.383384] ITS: alloc 9920:32
>> > [   40.386429] ITT 32 entries, 5 bits
>> > [   40.389970] ID:0 pID:9920 vID:23
>> > [   40.393188] ID:1 pID:9921 vID:24
>> > [   40.396404] ID:2 pID:9922 vID:25
>> > [   40.399621] ID:3 pID:9923 vID:26
>> > [   40.402836] ID:4 pID:9924 vID:27
>> > [   40.406053] ID:5 pID:9925 vID:28
>> > [   40.409269] ID:6 pID:9926 vID:29
>> > [   40.412485] ID:7 pID:9927 vID:30
>> > [   40.415702] ID:8 pID:9928 vID:31
>> > [   40.418916] ID:9 pID:9929 vID:32
>> > [   40.422132] ID:10 pID:9930 vID:33
>> > [   40.425435] ID:11 pID:9931 vID:34
>> > [   40.428739] ID:12 pID:9932 vID:35
>> > [   40.432042] ID:13 pID:9933 vID:36
>> > [   40.435345] ID:14 pID:9934 vID:37
>> > [   40.438648] ID:15 pID:9935 vID:38
>> > [   40.441951] ID:16 pID:9936 vID:39
>> >
>> >
>> > <snip>
> Awesome. Can I take this as a Tested-by?

Sure, btw, could you please also add:

Reported-by: Jiaxing Luo <luojiaxing@huawei.com>

... as he did initial discovery and analysis on the problem.


>
>> > Btw, I hacked the "Freed devid %x event %d LPI %ld\n" print to remove
>> > the "event" value, as you may have noticed.
> Yup, not meaningful for the problem at hand.
>
> Thanks again for your help!
>

Thanks for the help,
John

> 	M.