Now that mpt2sas no longer uses the serial_number, we can remove the
wrapper that acquires the host_lock around queuecommand. This is the
most contended lock for one benchmark, and on a 8-socket machine this
patch leads to a 70% application-level improvement.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index a7dbc68..67708b3 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -3680,9 +3680,9 @@ _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;
@@ -3690,7 +3690,6 @@ _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;
@@ -3814,8 +3813,6 @@ _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
--
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