> > Issue: When TM command times-out driver invokes the controller reset.
> > Post reset, driver re-fires pended TM commands which leads to firmware
> > crash.
> >
> > Fix: Post controller reset, return pended TM commands back to OS.
> >
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Sumit Saxena <sumit.saxena@xxxxxxxxxxxx>
> > Signed-off-by: Chandrakanth Patil <chandrakanth.patil@xxxxxxxxxxxx>
> > ---
> > drivers/scsi/megaraid/megaraid_sas_fusion.c | 7 ++++++-
> > 1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c
> > b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> > index 87f91a38..319f241 100644
> > --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
> > +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> > @@ -4180,6 +4180,7 @@ static void megasas_refire_mgmt_cmd(struct
> megasas_instance *instance,
> > struct fusion_context *fusion;
> > struct megasas_cmd *cmd_mfi;
> > union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
> > + struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
> > u16 smid;
> > bool refire_cmd = false;
> > u8 result;
> > @@ -4247,6 +4248,11 @@ static void megasas_refire_mgmt_cmd(struct
> megasas_instance *instance,
> > result = COMPLETE_CMD;
> > }
> >
> > + scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
> > + cmd_fusion->io_request;
> > + if (scsi_io_req->Function == MPI2_FUNCTION_SCSI_TASK_MGMT)
> > + result = RETURN_CMD;
> > +
> > switch (result) {
> > case REFIRE_CMD:
> > megasas_fire_cmd_fusion(instance, req_desc); @@ -4475,7
> +4481,6
> > @@ megasas_issue_tm(struct megasas_instance *instance, u16
> > device_handle,
> > if (!timeleft) {
> > dev_err(&instance->pdev->dev,
> > "task mgmt type 0x%x timed out\n", type);
> > - cmd_mfi->flags |= DRV_DCMD_SKIP_REFIRE;
> > mutex_unlock(&instance->reset_mutex);
> > rc = megasas_reset_fusion(instance->host, MFI_IO_TIMEOUT_OCR);
> > mutex_lock(&instance->reset_mutex);
> >
> Why didn't the 'DRV_DCMD_SKIP_REFIRE' work?
> And if it doesn't work, can't it be removed completely?
Re-fire logic doesn't check 'DRV_DCMD_SKIP_REFIRE' flag for TM commands
but it will check the flag for DCMDs
Hence, 'DRV_DCMD_SKIP_REFIRE' flag is only removed for TM commands.
-Chandrakanth Patil
