Re: [PATCH v3 0/4] SCSI: Fix issues between removing device and error handle

From: Wenchao Hao <haowenchao22@gmail.com>
To: Wenchao Hao <haowenchao2@huawei.com>
Cc: "James E . J . Bottomley" <jejb@linux.ibm.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
	louhongxiang@huawei.com
Subject: Re: [PATCH v3 0/4] SCSI: Fix issues between removing device and error handle
Date: Wed, 18 Oct 2023 01:00:31 +0800	[thread overview]
Message-ID: <CAOptpSMSpuU_NDKNPKRk1ZS76KhOfCmSeB7YxbD6jvNpvNGZPg@mail.gmail.com> (raw)
In-Reply-To: <20231016020314.1269636-1-haowenchao2@huawei.com>

On Mon, Oct 16, 2023 at 10:04 AM Wenchao Hao <haowenchao2@huawei.com> wrote:
>
> 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().

Friendly ping...

>
> 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
>
> V3:
>   - Update patch description
>   - Update comments of functions added
>
> 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        | 46 ++++++++++++++++++++++++++------------
>  drivers/scsi/scsi_error.c  |  4 ++--
>  drivers/scsi/scsi_lib.c    |  2 +-
>  include/scsi/scsi_device.h | 25 ++++++++++++++++++---
>  4 files changed, 57 insertions(+), 20 deletions(-)
>
> --
> 2.32.0
>