From: Arun Easi <aeasi@marvell.com>
Date: Tue, 29 Sep 2020 03:21:51 -0700
Subject: scsi: qla2xxx: Fix point-to-point (N2N) device discovery issue
Patch-mainline: Queued in subsystem maintainer repository
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git
Git-commit: 94eda2717826015a80ca271394c4378747de8936
References: bsc#1176946 bsc#1175520 bsc#1172538
Driver was using a shorter timeout waiting for PLOGI from the peer in
point-to-point configurations. Some devices takes some time (~4 seconds) to
initiate the PLOGI. This peer initiating PLOGI is when the peer has a
higher P-WWN.
Increase the wait time based on N2N R_A_TOV.
Link: https://lore.kernel.org/r/20200929102152.32278-7-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/scsi/qla2xxx/qla_def.h | 2 ++
drivers/scsi/qla2xxx/qla_mbx.c | 3 ++-
drivers/scsi/qla2xxx/qla_os.c | 2 ++
3 files changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -5147,6 +5147,8 @@ struct sff_8247_a0 {
ha->current_topology == ISP_CFG_N || \
!ha->current_topology)
+#define QLA_N2N_WAIT_TIME 5 /* 2 * ra_tov(n2n) + 1 */
+
#define NVME_TYPE(fcport) \
(fcport->fc4_type & FS_FC4TYPE_NVME) \
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -3994,7 +3994,8 @@ qla24xx_report_id_acquisition(scsi_qla_h
if (fcport) {
fcport->plogi_nack_done_deadline = jiffies + HZ;
- fcport->dm_login_expire = jiffies + 2*HZ;
+ fcport->dm_login_expire = jiffies +
+ QLA_N2N_WAIT_TIME * HZ;
fcport->scan_state = QLA_FCPORT_FOUND;
fcport->n2n_flag = 1;
fcport->keep_nport_handle = 1;
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -5110,6 +5110,8 @@ void qla24xx_create_new_sess(struct scsi
fcport->fc4_type = e->u.new_sess.fc4_type;
if (e->u.new_sess.fc4_type & FS_FCP_IS_N2N) {
+ fcport->dm_login_expire = jiffies +
+ QLA_N2N_WAIT_TIME * HZ;
fcport->fc4_type = FS_FC4TYPE_FCP;
fcport->n2n_flag = 1;
if (vha->flags.nvme_enabled)