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| author | Kashyap, Desai <kashyap.desai@lsi.com> | 2009-09-23 17:35:41 +0530 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-10-29 13:03:15 -0400 |
| commit | 8ffc457ed6fe33728657a0cfb7509b90d554c21f (patch) | |
| tree | 322b183b1883079e7114edfb4006a04b33574cda /drivers/scsi/mpt2sas | |
| parent | 463217bfecbf5d17a30133a55553d94aa9fc255e (diff) | |
| download | op-kernel-dev-8ffc457ed6fe33728657a0cfb7509b90d554c21f.zip op-kernel-dev-8ffc457ed6fe33728657a0cfb7509b90d554c21f.tar.gz | |
[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: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: Eric Moore <Eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/mpt2sas')
| -rw-r--r-- | drivers/scsi/mpt2sas/mpt2sas_scsih.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c index d0d6672..c81e842 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c +++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c @@ -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 |
