From c691d068065bd45a358ff0dda6e64e2a19ec44df Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Fri, 29 Mar 2019 01:39:36 +0000
Subject: [PATCH] qla2x00t-32gbit: Backport to kernel v4.19

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8101 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 qla2x00t-32gbit/qla_os.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/qla2x00t-32gbit/qla_os.c b/qla2x00t-32gbit/qla_os.c
index 91f576d74..aa75d3b8b 100644
--- a/qla2x00t-32gbit/qla_os.c
+++ b/qla2x00t-32gbit/qla_os.c
@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/blk-mq-pci.h>
 #include <linux/refcount.h>
+#include <linux/version.h>
 
 #include <scsi/scsi_tcq.h>
 #include <scsi/scsicam.h>
@@ -7179,12 +7180,19 @@ static int qla2xxx_map_queues(struct Scsi_Host *shost)
 {
 	int rc;
 	scsi_qla_host_t *vha = (scsi_qla_host_t *)shost->hostdata;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
 	struct blk_mq_queue_map *qmap = &shost->tag_set.map[0];
 
 	if (USER_CTRL_IRQ(vha->hw) || !vha->hw->mqiobase)
 		rc = blk_mq_map_queues(qmap);
 	else
 		rc = blk_mq_pci_map_queues(qmap, vha->hw->pdev, vha->irq_offset);
+#else
+	if (USER_CTRL_IRQ(vha->hw))
+		rc = blk_mq_map_queues(&shost->tag_set);
+	else
+		rc = blk_mq_pci_map_queues(&shost->tag_set, vha->hw->pdev, 0);
+#endif
 	return rc;
 }