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[SCSI] mpt2sas: Freeze the sdev IO queue when firmware sends internal dev reset

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When receiving the MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET event,
the driver will set the tm_busy flag in the sdev private host data, When
tm_busy flag is set, the driver will return SCSI_MLQUEUE_DEVICE_BUSY,
effectly freezing the IO to the device. The tm_busy flag is cleared with the
MPI2_EVENT_SAS_DEV_STAT_RC_CMP_INTERNAL_DEV_RESET event.

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 17:35:41 +05:30 committed by James Bottomley
parent 463217bfec
commit 8ffc457ed6
1 changed files with 33 additions and 1 deletions
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34
drivers/scsi/mpt2sas/mpt2sas_scsih.c
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@ -4308,11 +4308,43 @@ static void
_scsih_sas_device_status_change_event(struct MPT2SAS_ADAPTER *ioc,
struct fw_event_work *fw_event)
{
struct MPT2SAS_TARGET *target_priv_data;
struct _sas_device *sas_device;
__le64 sas_address;
unsigned long flags;
Mpi2EventDataSasDeviceStatusChange_t *event_data =
fw_event->event_data;
#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
_scsih_sas_device_status_change_event_debug(ioc,
fw_event->event_data);
event_data);
#endif
if (!(event_data->ReasonCode ==
MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET &&
event_data->ReasonCode ==
MPI2_EVENT_SAS_DEV_STAT_RC_CMP_INTERNAL_DEV_RESET))
return;
spin_lock_irqsave(&ioc->sas_device_lock, flags);
sas_address = le64_to_cpu(event_data->SASAddress);
sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
sas_address);
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
if (!sas_device || !sas_device->starget)
return;
target_priv_data = sas_device->starget->hostdata;
if (!target_priv_data)
return;
if (event_data->ReasonCode ==
MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET)
target_priv_data->tm_busy = 1;
else
target_priv_data->tm_busy = 0;
}
#ifdef CONFIG_SCSI_MPT2SAS_LOGGING