Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) client-ip=2620:137:e000::3:3;
From:   Wenchao Hao <haowenchao2@huawei.com>
To:     "James E . J . Bottomley" <jejb@linux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>,
        <linux-scsi@vger.kernel.org>
CC:     <linux-kernel@vger.kernel.org>, <louhongxiang@huawei.com>,
        Wenchao Hao <haowenchao2@huawei.com>
Subject: [PATCH v2 0/4] SCSI: Fix issues between removing device and error handle
Date:   Thu, 28 Sep 2023 15:35:39 +0800
Message-ID: <20230928073543.3496394-1-haowenchao2@huawei.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 7BIT
Content-Type:   text/plain; charset=US-ASCII
Precedence: bulk

I am testing SCSI error handle with my previous scsi_debug error
injection patches, and found some issues when removing device and
error handler happened together.

These issues are triggered because devices in removing would be skipped
when calling shost_for_each_device().

Three issues are found:
1. statistic info printed at beginning of scsi_error_handler is wrong
2. device reset is not triggered
3. IO requeued to request_queue would be hang after error handle

V2:
  - Fix IO hang by run all devices' queue after error handler
  - Do not modify shost_for_each_device() directly but add a new
    helper to iterate devices but do not skip devices in removing

Wenchao Hao (4):
  scsi: core: Add new helper to iterate all devices of host
  scsi: scsi_error: Fix wrong statistic when print error info
  scsi: scsi_error: Fix device reset is not triggered
  scsi: scsi_core:  Fix IO hang when device removing

 drivers/scsi/scsi.c        | 43 +++++++++++++++++++++++++-------------
 drivers/scsi/scsi_error.c  |  4 ++--
 drivers/scsi/scsi_lib.c    |  2 +-
 include/scsi/scsi_device.h | 25 +++++++++++++++++++---
 4 files changed, 53 insertions(+), 21 deletions(-)

-- 
2.32.0