Remove hba lock from NVMET issue WQE.

Unnecessary lock is taken. ring lock should be sufficient to protect the
work queue submission.

This was noticed when doing performance testing. The hbalock is not
needed to issue io to the nvme work queue.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>

diff --git a/drivers/scsi/lpfc/lpfc_nvmet.c b/drivers/scsi/lpfc/lpfc_nvmet.c
index c8a49418b735886af8ceb30a7c054bb6a3a17fd1..5a994a8d799d6da0f2c6f2a3818dc8dda0ba6fd3 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_nvmet.c
+++ b/drivers/scsi/lpfc/lpfc_nvmet.c
@@ -517,7 +517,6 @@ lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
                container_of(rsp, struct lpfc_nvmet_rcv_ctx, ctx.fcp_req);
        struct lpfc_hba *phba = ctxp->phba;
        struct lpfc_iocbq *nvmewqeq;
-       unsigned long iflags;
        int rc, id;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
@@ -571,10 +570,7 @@ lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
        lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
                         ctxp->oxid, rsp->op, rsp->rsplen);
 
-       /* For now we take hbalock */
-       spin_lock_irqsave(&phba->hbalock, iflags);
        rc = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, nvmewqeq);
-       spin_unlock_irqrestore(&phba->hbalock, iflags);
        if (rc == WQE_SUCCESS) {
                ctxp->flag |= LPFC_NVMET_IO_INP;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS