[PATCH 5.19 0619/1157] scsi: qla2xxx: edif: Reduce disruption due to multiple app start

Greg Kroah-Hartman
2022-08-16T00:14:11Z

From: Quinn Tran <qutran@marvell.com>

[ Upstream commit 0dbfce5255fe8d069a1a3b712a25b263264cfa58 ]

Multiple app start can trigger a session bounce. Make driver skip over
session teardown if app start is seen more than once.

Link: https://lore.kernel.org/r/20220608115849.16693-4-njavali@marvell.com
Fixes: 7ebb336e45ef ("scsi: qla2xxx: edif: Add start + stop bsgs")
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/qla2xxx/qla_edif.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_edif.c b/drivers/scsi/qla2xxx/qla_edif.c
index f9f4c4a6afcc..4523ae745e55 100644
--- a/drivers/scsi/qla2xxx/qla_edif.c
+++ b/drivers/scsi/qla2xxx/qla_edif.c
@@ -510,8 +510,7 @@ qla_edif_app_start(scsi_qla_host_t *vha, struct bsg_job *bsg_job)
/* mark doorbell as active since an app is now present */
vha->e_dbell.db_flags |= EDB_ACTIVE;
} else {
- ql_dbg(ql_dbg_edif, vha, 0x911e, "%s doorbell already active\n",
- __func__);
+ goto out;
}

if (N2N_TOPO(vha->hw)) {
@@ -578,6 +577,7 @@ qla_edif_app_start(scsi_qla_host_t *vha, struct bsg_job *bsg_job)
__func__);
}

+out:
appreply.host_support_edif = vha->hw->flags.edif_enabled;
appreply.edif_enode_active = vha->pur_cinfo.enode_flags;
appreply.edif_edb_active = vha->e_dbell.db_flags;
--
2.35.1