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[SCSI] mpt2sas: setting SDEV into RUNNING state from Interrupt context

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Changing SDEV Running state from interrupt context. Previously It was
handle in work queue thread. With this change It will not wait for work
queue thread to execute scsih_ublock_io_device to put SDEV into Running
state. This will reduce delay for Device becoming RUNNING.

Modified this patch considering James comment "Not to change SDEV state
using  scsi_device_set_state API, instead use scsi_internal_device_unblock
scsi_internal_device_block API"

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <Eric.moore@lsi.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai 2009-08-20 13:23:19 +05:30 committed by James Bottomley
parent cc0f520766
commit 34a03bef22
2 changed files with 13 additions and 6 deletions
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2
drivers/scsi/mpt2sas/mpt2sas_base.h
View file

@ -802,5 +802,7 @@ void mpt2sas_transport_update_links(struct MPT2SAS_ADAPTER *ioc, u16 handle,
u16 attached_handle, u8 phy_number, u8 link_rate);
extern struct sas_function_template mpt2sas_transport_functions;
extern struct scsi_transport_template *mpt2sas_transport_template;
extern int scsi_internal_device_block(struct scsi_device *sdev);
extern int scsi_internal_device_unblock(struct scsi_device *sdev);
#endif /* MPT2SAS_BASE_H_INCLUDED */

17
drivers/scsi/mpt2sas/mpt2sas_scsih.c
View file

@ -2222,7 +2222,7 @@ _scsih_ublock_io_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
MPT2SAS_INFO_FMT "SDEV_RUNNING: "
"handle(0x%04x)\n", ioc->name, handle));
sas_device_priv_data->block = 0;
scsi_device_set_state(sdev, SDEV_RUNNING);
scsi_internal_device_unblock(sdev);
}
}
}
@ -2251,7 +2251,7 @@ _scsih_block_io_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
MPT2SAS_INFO_FMT "SDEV_BLOCK: "
"handle(0x%04x)\n", ioc->name, handle));
sas_device_priv_data->block = 1;
scsi_device_set_state(sdev, SDEV_BLOCK);
scsi_internal_device_block(sdev);
}
}
}
@ -2327,6 +2327,7 @@ _scsih_block_io_to_children_attached_directly(struct MPT2SAS_ADAPTER *ioc,
u16 handle;
u16 reason_code;
u8 phy_number;
u8 link_rate;
for (i = 0; i < event_data->NumEntries; i++) {
handle = le16_to_cpu(event_data->PHY[i].AttachedDevHandle);
@ -2337,6 +2338,11 @@ _scsih_block_io_to_children_attached_directly(struct MPT2SAS_ADAPTER *ioc,
MPI2_EVENT_SAS_TOPO_RC_MASK;
if (reason_code == MPI2_EVENT_SAS_TOPO_RC_DELAY_NOT_RESPONDING)
_scsih_block_io_device(ioc, handle);
if (reason_code == MPI2_EVENT_SAS_TOPO_RC_PHY_CHANGED) {
link_rate = event_data->PHY[i].LinkRate >> 4;
if (link_rate >= MPI2_SAS_NEG_LINK_RATE_1_5)
_scsih_ublock_io_device(ioc, handle);
}
}
}
@ -3690,6 +3696,9 @@ _scsih_remove_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
le32_to_cpu(mpi_reply.IOCLogInfo)));
out:
_scsih_ublock_io_device(ioc, handle);
mpt2sas_transport_port_remove(ioc, sas_device->sas_address,
sas_device->parent_handle);
@ -3871,10 +3880,6 @@ _scsih_sas_topology_change_event(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID,
link_rate_);
}
}
if (reason_code == MPI2_EVENT_SAS_TOPO_RC_PHY_CHANGED) {
if (link_rate_ >= MPI2_SAS_NEG_LINK_RATE_1_5)
_scsih_ublock_io_device(ioc, handle);
}
if (reason_code == MPI2_EVENT_SAS_TOPO_RC_TARG_ADDED) {
if (link_rate_ < MPI2_SAS_NEG_LINK_RATE_1_5)
break;