linux-kernel - RE: [PATCH] scsi: ufs: Add total count for each error history

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Date:   Wed, 3 Feb 2021 17:00:47 +0900
From:   "DooHyun Hwang" <dh0421.hwang@...sung.com>
To:     "'Adrian Hunter'" <adrian.hunter@...el.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <alim.akhtar@...sung.com>, <avri.altman@....com>,
        <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
        <stanley.chu@...iatek.com>, <cang@...eaurora.org>,
        <asutoshd@...eaurora.org>, <beanhuo@...ron.com>,
        <jaegeuk@...nel.org>, <satyat@...gle.com>
Cc:     <grant.jung@...sung.com>, <jt77.jang@...sung.com>,
        <junwoo80.lee@...sung.com>, <jangsub.yi@...sung.com>,
        <sh043.lee@...sung.com>, <cw9316.lee@...sung.com>,
        <sh8267.baek@...sung.com>, <wkon.kim@...sung.com>
Subject: RE: [PATCH] scsi: ufs: Add total count for each error history

Hi

Thank you for your review and I found the below commit in linux-next.
So, I'll reject this patch.

>On 3/02/21 8:53 am, DooHyun Hwang wrote:
>> Since the total error history count is unknown because the error
>> history records only the number of UFS_EVENT_HIST_LENGTH, add a member
>> to count each error history.
>>
>> Signed-off-by: DooHyun Hwang <dh0421.hwang@...sung.com>
>
>Hi
>
>Please note that the following patch is already queued - see linux-next
>
>
>commit b6cacaf2044fd9b82e5ceac88d8d17e04a01982f
>Author: Adrian Hunter <adrian.hunter@...el.com>
>Date:   Thu Jan 7 09:25:38 2021 +0200
>
>    scsi: ufs: ufs-debugfs: Add error counters
>
>    People testing have a need to know how many errors might be occurring
>over
>    time. Add error counters and expose them via debugfs.
>
>    A module initcall is used to create a debugfs root directory for
>    ufshcd-related items. In the case that modules are built-in, then
>    initialization is done in link order, so move ufshcd-core to the top of
>the
>    Makefile.
>
>    Link: https://lore.kernel.org/r/20210107072538.21782-1-
>adrian.hunter@...el.com
>    Reviewed-by: Avri Altman <avri.altman@....com>
>    Reviewed-by: Bean Huo <beanhuo@...ron.com>
>    Reviewed-by: Can Guo <cang@...eaurora.org>
>    Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
>    Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
>
>
>> ---
>>  drivers/scsi/ufs/ufshcd.c | 3 +++
>>  drivers/scsi/ufs/ufshcd.h | 1 +
>>  2 files changed, 4 insertions(+)
>>
>> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
>> index fb32d122f2e3..7ebc892553fc 100644
>> --- a/drivers/scsi/ufs/ufshcd.c
>> +++ b/drivers/scsi/ufs/ufshcd.c
>> @@ -437,6 +437,8 @@ static void ufshcd_print_evt(struct ufs_hba *hba,
>> u32 id,
>>
>>  	if (!found)
>>  		dev_err(hba->dev, "No record of %s\n", err_name);
>> +	else
>> +		dev_err(hba->dev, "%s: total count=%u\n", err_name, e->count);
>>  }
>>
>>  static void ufshcd_print_evt_hist(struct ufs_hba *hba) @@ -4544,6
>> +4546,7 @@ void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32
>val)
>>  	e->val[e->pos] = val;
>>  	e->tstamp[e->pos] = ktime_get();
>>  	e->pos = (e->pos + 1) % UFS_EVENT_HIST_LENGTH;
>> +	e->count++;
>>
>>  	ufshcd_vops_event_notify(hba, id, &val);  } diff --git
>> a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index
>> aa9ea3552323..df28d3fc89a5 100644
>> --- a/drivers/scsi/ufs/ufshcd.h
>> +++ b/drivers/scsi/ufs/ufshcd.h
>> @@ -450,6 +450,7 @@ struct ufs_event_hist {
>>  	int pos;
>>  	u32 val[UFS_EVENT_HIST_LENGTH];
>>  	ktime_t tstamp[UFS_EVENT_HIST_LENGTH];
>> +	u32 count;
>>  };
>>
>>  /**
>>