mpt2sas: Remove use of DEF_SCSI_QCMD

Removing the host_lock from the I/O submission path gives a huge
scalability improvement.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org>
Reviewed-by: Praveen Krishnamoorthy <Praveen.krishnamoorthy@lsi.com>
Acked-by: Sreekanth Reddy <Sreekanth.reddy@lsi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index e19dfde..5055f92 100644 (file)
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -3950,9 +3950,9 @@ _scsih_setup_direct_io(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
  * SCSI_MLQUEUE_HOST_BUSY if the entire host queue is full
  */
 static int
-_scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
+_scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
 {
-       struct MPT2SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
+       struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
        struct MPT2SAS_DEVICE *sas_device_priv_data;
        struct MPT2SAS_TARGET *sas_target_priv_data;
        struct _raid_device *raid_device;
@@ -3960,7 +3960,6 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
        u32 mpi_control;
        u16 smid;
 
-       scmd->scsi_done = done;
        sas_device_priv_data = scmd->device->hostdata;
        if (!sas_device_priv_data || !sas_device_priv_data->sas_target) {
                scmd->result = DID_NO_CONNECT << 16;
@@ -4036,7 +4035,7 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
            MPT_TARGET_FLAGS_RAID_COMPONENT)
                mpi_request->Function = MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH;
        else
-               mpi_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
+       mpi_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
        mpi_request->DevHandle =
            cpu_to_le16(sas_device_priv_data->sas_target->handle);
        mpi_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
@@ -4080,8 +4079,6 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
        return SCSI_MLQUEUE_HOST_BUSY;
 }
 
-static DEF_SCSI_QCMD(_scsih_qcmd)
-
 /**
  * _scsih_normalize_sense - normalize descriptor and fixed format sense data
  * @sense_buffer: sense data returned by target