[SCSI] mpt2sas: WarpDrive Infinite command retries due to wrong scsi command entry in MPI message
Issue:
This issue is seen on LSI H/W WarpDrive SSS6200 When filed direct I/O
is tried as volume I/O the scmd field in internal lookup table get
cleared and because of that the retried volume I/O never gets reported
as completed to SML.
Result:
I/O timeout and Error handling thread will kicking off
Fix:
Setting back the scmd in the lookup table before retrying the failed
direct i/o
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 939f283..6abd2fc 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -4258,6 +4258,7 @@
u32 log_info;
struct MPT2SAS_DEVICE *sas_device_priv_data;
u32 response_code = 0;
+ unsigned long flags;
mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
scmd = _scsih_scsi_lookup_get_clear(ioc, smid);
@@ -4282,6 +4283,9 @@
* the failed direct I/O should be redirected to volume
*/
if (_scsih_scsi_direct_io_get(ioc, smid)) {
+ spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+ ioc->scsi_lookup[smid - 1].scmd = scmd;
+ spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
_scsih_scsi_direct_io_set(ioc, smid, 0);
memcpy(mpi_request->CDB.CDB32, scmd->cmnd, scmd->cmd_len);
mpi_request->DevHandle =