Commit 8ffc457e authored by Kashyap, Desai's avatar Kashyap, Desai Committed by James Bottomley
Browse files

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



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: default avatarKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: default avatarEric Moore <Eric.moore@lsi.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 463217bf

drivers/scsi/mpt2sas/mpt2sas_scsih.c

+33 −1
Original line number Diff line number Diff line
@@ -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

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