[SCSI] lpfc 8.3.15: Add target queue depth throttling
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index d6089c9..c818a72 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -2458,14 +2458,16 @@
}
spin_unlock_irqrestore(shost->host_lock, flags);
} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
- if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
+ if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
time_after(jiffies, pnode->last_change_time +
msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
spin_lock_irqsave(shost->host_lock, flags);
- pnode->cmd_qdepth += pnode->cmd_qdepth *
- LPFC_TGTQ_RAMPUP_PCENT / 100;
- if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH)
- pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
+ depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
+ / 100;
+ depth = depth ? depth : 1;
+ pnode->cmd_qdepth += depth;
+ if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
+ pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
pnode->last_change_time = jiffies;
spin_unlock_irqrestore(shost->host_lock, flags);
}
@@ -2920,8 +2922,7 @@
cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
goto out_fail_command;
}
- if (vport->cfg_max_scsicmpl_time &&
- (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth))
+ if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
goto out_host_busy;
lpfc_cmd = lpfc_get_scsi_buf(phba);