linux-kernel - Re: [PATCH v4 0/3] SCSI: Fix issues between removing device and error handle

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Date: Tue, 26 Mar 2024 14:37:24 +0800
From: Wenchao Hao <haowenchao2@...wei.com>
To: "James E . J . Bottomley" <jejb@...ux.ibm.com>, "Martin K . Petersen"
	<martin.petersen@...cle.com>, <linux-scsi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: <louhongxiang@...wei.com>
Subject: Re: [PATCH v4 0/3] SCSI: Fix issues between removing device and error
 handle

On 2024/3/7 22:43, Wenchao Hao 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().
> 

Ping...

> The issues are found:
> 1. statistic info printed at beginning of scsi_error_handler is wrong
> 2. device reset is not triggered
> 
> V4:
>   - Remove the forth patch which fix IO hang when device removing
>     becaust the issue is fixed by commit '6df0e077d76bd (scsi: core:
>     Kick the requeue list after inserting when flushing)'
> 
> 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 (3):
>    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
> 
>   drivers/scsi/scsi.c        | 46 ++++++++++++++++++++++++++------------
>   drivers/scsi/scsi_error.c  |  4 ++--
>   include/scsi/scsi_device.h | 25 ++++++++++++++++++---
>   3 files changed, 56 insertions(+), 19 deletions(-)
>