linux-kernel - Re: [PATCH] scsi: smartpqi: Reporting unhandled SCSI errors

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Date:   Wed, 10 Apr 2019 13:02:51 +0200
From:   Erwan Velu <erwanaliasr1@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Erwan Velu <e.velu@...teo.com>,
        Don Brace <don.brace@...rosemi.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "open list:MICROSEMI SMART ARRAY SMARTPQI DRIVER (smartpqi)" 
        <esc.storagedev@...rosemi.com>,
        "open list:MICROSEMI SMART ARRAY SMARTPQI DRIVER (smartpqi)" 
        <linux-scsi@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scsi: smartpqi: Reporting unhandled SCSI errors

Hi there !
Any reactions to this one ? I didn't got a single comment.
Cheers,
Erwan,

Le jeu. 21 mars 2019 à 10:49, Erwan Velu <erwanaliasr1@...il.com> a écrit :
>
> When a HARDWARE_ERROR is triggered for asc=0x3e, the actual code is only considering the case where ascq=0x1.
>
> Following the http://www.t10.org/lists/asc-num.htm#ASC_3E specification, other values may occur like a timeout (ascq=0x2).
>
> This patch is about printing an error message when a non-handled message is received.
> This could help diagnose a possible miss-behavior of the controller and/or a missing implementation in the Linux Kernel.
>
> This patch keeps the exact same error handling but prints a message if an ascq != 1 income.
>
> Signed-off-by: Erwan Velu <e.velu@...teo.com>
> ---
>  drivers/scsi/smartpqi/smartpqi_init.c | 23 ++++++++++++++++-------
>  1 file changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
> index 75ec43aa8df3..baf16c138800 100644
> --- a/drivers/scsi/smartpqi/smartpqi_init.c
> +++ b/drivers/scsi/smartpqi/smartpqi_init.c
> @@ -2762,16 +2762,25 @@ static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
>                         scsi_normalize_sense(error_info->data,
>                                 sense_data_length, &sshdr) &&
>                                 sshdr.sense_key == HARDWARE_ERROR &&
> -                               sshdr.asc == 0x3e &&
> -                               sshdr.ascq == 0x1) {
> +                               sshdr.asc == 0x3e) {
>                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
>                         struct pqi_scsi_dev *device = scmd->device->hostdata;
>
> -                       if (printk_ratelimit())
> -                               scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
> -                                       ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
> -                       pqi_take_device_offline(scmd->device, "RAID");
> -                       host_byte = DID_NO_CONNECT;
> +                       switch (sshdr.ascq) {
> +                       case 0x1: /*LOGICAL UNIT FAILURE */
> +                               if (printk_ratelimit())
> +                                       scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
> +                                               ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
> +                               pqi_take_device_offline(scmd->device, "RAID");
> +                               host_byte = DID_NO_CONNECT;
> +                               break;
> +
> +                       default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
> +                               if (printk_ratelimit())
> +                                       scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
> +                                               sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
> +                               break;
> +                       }
>                 }
>
>                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
> --
> 2.20.1
>