scsi: qla2xxx: Fix disk failure to rediscover

commit 6a45c8e137d4e2c72eecf1ac7cf64f2fdfcead99 upstream.

User experienced some of the LUN failed to get rediscovered after long
cable pull test. The issue is triggered by a race condition between driver
setting session online state vs starting the LUN scan process at the same
time. Current code set the online state after notifying the session is
available. In this case, trigger to start the LUN scan process happened
before driver could set the session in online state.  LUN scan ends up with
failure due to the session online check was failing.

Set the online state before reporting of the availability of the session.

Link: https://lore.kernel.org/r/20220310092604.22950-3-njavali@marvell.com
Fixes: aecf043443d3 ("scsi: qla2xxx: Fix Remote port registration")
Cc: stable@vger.kernel.org
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index dbe10b3b1b0d9787ac4696f793a35ea18d05a865..3cbce3d80e44f216ac33a6ae15cc6a50cfd7d13a 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -5531,6 +5531,8 @@ qla2x00_reg_remote_port(scsi_qla_host_t *vha, fc_port_t *fcport)
        if (atomic_read(&fcport->state) == FCS_ONLINE)
                return;
 
+       qla2x00_set_fcport_state(fcport, FCS_ONLINE);
+
        rport_ids.node_name = wwn_to_u64(fcport->node_name);
        rport_ids.port_name = wwn_to_u64(fcport->port_name);
        rport_ids.port_id = fcport->d_id.b.domain << 16 |
@@ -5631,6 +5633,7 @@ qla2x00_update_fcport(scsi_qla_host_t *vha, fc_port_t *fcport)
                qla2x00_reg_remote_port(vha, fcport);
                break;
        case MODE_TARGET:
+               qla2x00_set_fcport_state(fcport, FCS_ONLINE);
                if (!vha->vha_tgt.qla_tgt->tgt_stop &&
                        !vha->vha_tgt.qla_tgt->tgt_stopped)
                        qlt_fc_port_added(vha, fcport);
@@ -5645,8 +5648,6 @@ qla2x00_update_fcport(scsi_qla_host_t *vha, fc_port_t *fcport)
                break;
        }
 
-       qla2x00_set_fcport_state(fcport, FCS_ONLINE);
-
        if (IS_IIDMA_CAPABLE(vha->hw) && vha->hw->flags.gpsc_supported) {
                if (fcport->id_changed) {
                        fcport->id_changed = 0;

diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 5acee3c798d42771e739201f043e9c44ce42dcb6..75e0114713b30aef3c4eec26939da26d54bd3bdb 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -35,6 +35,11 @@ int qla_nvme_register_remote(struct scsi_qla_host *vha, struct fc_port *fcport)
                (fcport->nvme_flag & NVME_FLAG_REGISTERED))
                return 0;
 
+       if (atomic_read(&fcport->state) == FCS_ONLINE)
+               return 0;
+
+       qla2x00_set_fcport_state(fcport, FCS_ONLINE);
+
        fcport->nvme_flag &= ~NVME_FLAG_RESETTING;
 
        memset(&req, 0, sizeof(struct nvme_fc_port_info));