[PATCH] qla2xxx: Fix FC-NVMe LUN discovery

[Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>]

From: Darren Trapp <darren.trapp@xxxxxxxxxx>

commit a4239945b8ad ("scsi: qla2xxx: Add switch command to simplify fabric discovery")
introduced regression when it did not consider FC-NVMe code path which broke
NVMe LUN discovery.

Fixes: a4239945b8ad ("scsi: qla2xxx: Add switch command to simplify fabric discovery")
Signed-off-by: Darren Trapp <darren.trapp@xxxxxxxxxx>
Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
---
Hi Martin, 

This patch fixes FC-NVMe LUN discovery for the series sent out during merge window. 
Please apply this to 4.16/scsi-fixes at your earliest convenience. 

Thanks,
Himanshu
---
 drivers/scsi/qla2xxx/qla_def.h  | 1 +
 drivers/scsi/qla2xxx/qla_gs.c   | 3 +++
 drivers/scsi/qla2xxx/qla_init.c | 8 +++++++-
 drivers/scsi/qla2xxx/qla_os.c   | 7 +++++--
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 3ca4b6a5eddd..c9689f97c307 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2217,6 +2217,7 @@ typedef struct {
 
 /* FCP-4 types */
 #define FC4_TYPE_FCP_SCSI	0x08
+#define FC4_TYPE_NVME		0x28
 #define FC4_TYPE_OTHER		0x0
 #define FC4_TYPE_UNKNOWN	0xff
 
diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 3cb05c1bd7bf..e6bb78e6f1d4 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3971,6 +3971,9 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp)
 	spin_lock_irqsave(&vha->work_lock, flags);
 	vha->scan.scan_flags &= ~SF_SCANNING;
 	spin_unlock_irqrestore(&vha->work_lock, flags);
+
+	if ((fc4type == FC4_TYPE_FCP_SCSI) && vha->flags.nvme_enabled)
+		qla24xx_async_gpnft(vha, FC4_TYPE_NVME);
 }
 
 static void qla2x00_async_gpnft_gnnft_sp_done(void *s, int res)
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 5618120128b5..c4b04e807e12 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1061,6 +1061,7 @@ void qla24xx_handle_gpdb_event(scsi_qla_host_t *vha, struct event_arg *ea)
 	fc_port_t *fcport = ea->fcport;
 	struct port_database_24xx *pd;
 	struct srb *sp = ea->sp;
+	uint8_t	ls;
 
 	pd = (struct port_database_24xx *)sp->u.iocb_cmd.u.mbx.in;
 
@@ -1073,7 +1074,12 @@ void qla24xx_handle_gpdb_event(scsi_qla_host_t *vha, struct event_arg *ea)
 	if (fcport->disc_state == DSC_DELETE_PEND)
 		return;
 
-	switch (pd->current_login_state) {
+	if (fcport->fc4f_nvme)
+		ls = pd->current_login_state >> 4;
+	else
+		ls = pd->current_login_state & 0xf;
+
+	switch (ls) {
 	case PDS_PRLI_COMPLETE:
 		__qla24xx_parse_gpdb(vha, fcport, pd);
 		break;
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 585f37155f29..285911e81728 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -4807,9 +4807,12 @@ void qla24xx_create_new_sess(struct scsi_qla_host *vha, struct qla_work_evt *e)
 			fcport->d_id = e->u.new_sess.id;
 			fcport->flags |= FCF_FABRIC_DEVICE;
 			fcport->fw_login_state = DSC_LS_PLOGI_PEND;
-			if (e->u.new_sess.fc4_type == FC4_TYPE_FCP_SCSI)
+			if (e->u.new_sess.fc4_type == FC4_TYPE_FCP_SCSI) {
 				fcport->fc4_type = FC4_TYPE_FCP_SCSI;
-
+			} else if (e->u.new_sess.fc4_type == FC4_TYPE_NVME) {
+				fcport->fc4_type = FC4_TYPE_OTHER;
+				fcport->fc4f_nvme = FC4_TYPE_NVME;
+			}
 			memcpy(fcport->port_name, e->u.new_sess.port_name,
 			    WWN_SIZE);
 		} else {
-- 
2.12.0