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scsi: smartpqi: Improve handling of multipath failover

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Improve multipath failovers by mapping firmware errors into I/O errors.

In some rare instances, firmware does not return the proper error code for
I/O errors caused by a multipath path failure.

Map I/O errors returned by firmware into errors that help the multipath
layer to detect the failure of a path.

Reviewed-by: Gerry Morong <gerry.morong@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Link: https://lore.kernel.org/r/20240711194704.982400-5-don.brace@microchip.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Kevin Barnett 2024-07-11 14:47:03 -05:00 committed by Martin K. Petersen
parent f1393d52e6
commit 57abab70a5
1 changed files with 15 additions and 1 deletions
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16
drivers/scsi/smartpqi/smartpqi_init.c
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@ -3247,6 +3247,20 @@ static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
sense_data_length);
}
if (pqi_cmd_priv(scmd)->this_residual &&
!pqi_is_logical_device(scmd->device->hostdata) &&
scsi_status == SAM_STAT_CHECK_CONDITION &&
host_byte == DID_OK &&
sense_data_length &&
scsi_normalize_sense(error_info->data, sense_data_length, &sshdr) &&
sshdr.sense_key == ILLEGAL_REQUEST &&
sshdr.asc == 0x26 &&
sshdr.ascq == 0x0) {
host_byte = DID_NO_CONNECT;
pqi_take_device_offline(scmd->device, "AIO");
scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR, 0x3e, 0x1);
}
scmd->result = scsi_status;
set_host_byte(scmd, host_byte);
}
@ -6021,7 +6035,7 @@ static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scm
ctrl_info = shost_to_hba(shost);
if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
if (pqi_ctrl_offline(ctrl_info) || pqi_device_offline(device) || pqi_device_in_remove(device)) {
set_host_byte(scmd, DID_NO_CONNECT);
pqi_scsi_done(scmd);
return 0;