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scsi: pm80xx: Fix double completion for SATA devices
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[ Upstream commit c26b85e ]

Current code handles completions for SATA devices in mpi_sata_completion()
and mpi_sata_event().

However, at the time when any SATA event happens, for almost all the event
types, the command is still in the target. It is therefore incorrect to
complete the task in sata_event().

There are some events for which we get sata_completions, some need recovery
procedure and others abort. All the tasks must be completed via
sata_completion() path.

Removed the task done related code from sata_events().  For tasks where we
don't get completions, let top layer call abort() to abort the command post
timeout.

Link: https://lore.kernel.org/r/20220124082255.86223-1-Ajish.Koshy@microchip.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Co-developed-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ajish Koshy <Ajish.Koshy@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@gregkh
Ajish Koshy authored and gregkh committed Feb 23, 2022
1 parent 64d6f76 commit 3801775
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Showing 2 changed files with 0 additions and 44 deletions.
18 changes: 0 additions & 18 deletions drivers/scsi/pm8001/pm8001_hwi.c
View file
Expand Up @@ -2695,7 +2695,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
u32 tag = le32_to_cpu(psataPayload->tag);
u32 port_id = le32_to_cpu(psataPayload->port_id);
u32 dev_id = le32_to_cpu(psataPayload->device_id);
unsigned long flags;

ccb = &pm8001_ha->ccb_info[tag];

Expand Down Expand Up @@ -2735,8 +2734,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_DATA_OVERRUN;
ts->residual = 0;
if (pm8001_dev)
atomic_dec(&pm8001_dev->running_req);
break;
case IO_XFER_ERROR_BREAK:
pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_BREAK\n");
Expand Down Expand Up @@ -2778,7 +2775,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
IO_OPEN_CNX_ERROR_IT_NEXUS_LOSS);
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_QUEUE_FULL;
pm8001_ccb_task_free_done(pm8001_ha, t, ccb, tag);
return;
}
break;
Expand Down Expand Up @@ -2864,20 +2860,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
ts->stat = SAS_OPEN_TO;
break;
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
pm8001_dbg(pm8001_ha, FAIL,
"task 0x%p done with io_status 0x%x resp 0x%x stat 0x%x but aborted by upper layer!\n",
t, event, ts->resp, ts->stat);
pm8001_ccb_task_free(pm8001_ha, t, ccb, tag);
} else {
spin_unlock_irqrestore(&t->task_state_lock, flags);
pm8001_ccb_task_free_done(pm8001_ha, t, ccb, tag);
}
}

/*See the comments for mpi_ssp_completion */
Expand Down
26 changes: 0 additions & 26 deletions drivers/scsi/pm8001/pm80xx_hwi.c
View file
Expand Up @@ -2828,7 +2828,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha,
u32 tag = le32_to_cpu(psataPayload->tag);
u32 port_id = le32_to_cpu(psataPayload->port_id);
u32 dev_id = le32_to_cpu(psataPayload->device_id);
unsigned long flags;

ccb = &pm8001_ha->ccb_info[tag];

Expand Down Expand Up @@ -2866,8 +2865,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha,
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_DATA_OVERRUN;
ts->residual = 0;
if (pm8001_dev)
atomic_dec(&pm8001_dev->running_req);
break;
case IO_XFER_ERROR_BREAK:
pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_BREAK\n");
Expand Down Expand Up @@ -2916,11 +2913,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha,
IO_OPEN_CNX_ERROR_IT_NEXUS_LOSS);
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_QUEUE_FULL;
spin_unlock_irqrestore(&circularQ->oq_lock,
circularQ->lock_flags);
pm8001_ccb_task_free_done(pm8001_ha, t, ccb, tag);
spin_lock_irqsave(&circularQ->oq_lock,
circularQ->lock_flags);
return;
}
break;
Expand Down Expand Up @@ -3020,24 +3012,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha,
ts->stat = SAS_OPEN_TO;
break;
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
pm8001_dbg(pm8001_ha, FAIL,
"task 0x%p done with io_status 0x%x resp 0x%x stat 0x%x but aborted by upper layer!\n",
t, event, ts->resp, ts->stat);
pm8001_ccb_task_free(pm8001_ha, t, ccb, tag);
} else {
spin_unlock_irqrestore(&t->task_state_lock, flags);
spin_unlock_irqrestore(&circularQ->oq_lock,
circularQ->lock_flags);
pm8001_ccb_task_free_done(pm8001_ha, t, ccb, tag);
spin_lock_irqsave(&circularQ->oq_lock,
circularQ->lock_flags);
}
}

/*See the comments for mpi_ssp_completion */
Expand Down

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