iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mpt2sas: map log_info value 0x0x32010081 to DID_RESET

Browse Source 
For any SCSI command, if the driver receives IOC status =
SCSI_IOC_TERMINATED and log info = 0x32010081 then that command will be
completed with DID_RESET host status.

The definition of this log info value is "Virtual IO has failed and has
to be retried".

Firmware will provide this log info value with IOC Status
"SCSI_IOC_TERMINATED", whenever a drive (with is a part of a volume)
is pulled and pushed back within some minimal delay.  With this log info
value, firmware informs the driver to retry the failed IO command
infinite times, so to provide some time for the firmware to discover
the reinserted drive successfully instated of just retrying failed
command for five times( doesn't giving enough time for firmware to
complete the drive discovery) and failing the IO permanently even
though drive came back successfully.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sreekanth Reddy 2015-01-12 11:39:01 +05:30 committed by Christoph Hellwig
parent ad666a0f41
commit d2227f7374
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/scsi/mpt2sas/mpt2sas_scsih.c
View File

@ -4543,6 +4543,10 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
scmd->result = DID_TRANSPORT_DISRUPTED << 16;
goto out;
}
if (log_info == 0x32010081) {
scmd->result = DID_RESET << 16;
break;
}
scmd->result = DID_SOFT_ERROR << 16;
break;
case MPI2_IOCSTATUS_SCSI_TASK_TERMINATED: