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[SCSI] mpt2sas: Return DID_TRANSPORT_DISRUPTED in nexus loss,SCSI_MLQUEUE_DEVICE_BUSY if device is busy

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1 Its observed that the OS was sending request to the driver after it had been
put into blocking state, so the driver was modified to return
SCSI_MLQUEUE_DEVICE_BUSY.
2. Driver will return DID_TRANSPORT_DISRUPTED when sdev is haivng nexus loss.
This occurrs when sdev is blocked, between the
MPI2_EVENT_SAS_TOPO_RC_DELAY_NOT_RESPONDING and
MPI2_EVENT_SAS_TOPO_RC_TARG_NOT_RESPONDING events.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: Eric Moore <Eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai 2009-09-23 17:33:14 +05:30 committed by James Bottomley
parent 96b681c6ad
commit e4e7c7ed34
1 changed files with 3 additions and 4 deletions
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7
drivers/scsi/mpt2sas/mpt2sas_scsih.c
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@ -2885,7 +2885,7 @@ _scsih_qcmd(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
}
/* see if we are busy with task managment stuff */
if (sas_target_priv_data->tm_busy)
if (sas_device_priv_data->block || sas_target_priv_data->tm_busy)
return SCSI_MLQUEUE_DEVICE_BUSY;
else if (ioc->shost_recovery || ioc->ioc_link_reset_in_progress)
return SCSI_MLQUEUE_HOST_BUSY;
@ -3351,10 +3351,9 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
case MPI2_IOCSTATUS_SCSI_IOC_TERMINATED:
if (sas_device_priv_data->block) {
scmd->result = (DID_BUS_BUSY << 16);
break;
scmd->result = DID_TRANSPORT_DISRUPTED << 16;
goto out;
}
case MPI2_IOCSTATUS_SCSI_TASK_TERMINATED:
case MPI2_IOCSTATUS_SCSI_EXT_TERMINATED:
scmd->result = DID_RESET << 16;