[PATCH 07/15] qla2xxx: Fix Relogin to prevent modifying scan_state flag

[Himanshu Madhani]

From: Quinn Tran <qut...@marvell.com>

Relogin fail to move forward due scan_state flag indicate
device is not there. Before relogin process, Session delete
process accidently modified the scan_state flag.

Fixes: 79140e2f4fa7 ("scsi: qla2xxx: Fix login state machine freeze")
Cc: sta...@vger.kernel.org
Signed-off-by: Quinn Tran <qut...@marvell.com>
Signed-off-by: Himanshu Madhani <hmadh...@marvell.com>
---
 drivers/scsi/qla2xxx/qla_init.c   | 25 ++++++++++++++++++++-----
 drivers/scsi/qla2xxx/qla_os.c     |  1 +
 drivers/scsi/qla2xxx/qla_target.c |  1 -
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 68d7496a8aff..02bbc5bdaa43 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -303,8 +303,13 @@ qla2x00_async_login(struct scsi_qla_host *vha, fc_port_t 
*fcport,
        struct srb_iocb *lio;
        int rval = QLA_FUNCTION_FAILED;
 
-       if (!vha->flags.online)
-               goto done;
+       if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT) ||
+           fcport->loop_id == FC_NO_LOOP_ID) {
+               ql_log(ql_log_warn, vha, 0xffff,
+                   "%s: %8phC - not sending command.\n",
+                   __func__, fcport->port_name);
+               return rval;
+       }
 
        sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
        if (!sp)
@@ -1276,8 +1281,13 @@ int qla24xx_async_gpdb(struct scsi_qla_host *vha, 
fc_port_t *fcport, u8 opt)
        struct port_database_24xx *pd;
        struct qla_hw_data *ha = vha->hw;
 
-       if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT))
+       if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT) ||
+           fcport->loop_id == FC_NO_LOOP_ID) {
+               ql_log(ql_log_warn, vha, 0xffff,
+                   "%s: %8phC - not sending command.\n",
+                   __func__, fcport->port_name);
                return rval;
+       }
 
        fcport->disc_state = DSC_GPDB;
 
@@ -1967,8 +1977,11 @@ qla24xx_handle_plogi_done_event(struct scsi_qla_host 
*vha, struct event_arg *ea)
                return;
        }
 
-       if (fcport->disc_state == DSC_DELETE_PEND)
+       if ((fcport->disc_state == DSC_DELETE_PEND) ||
+           (fcport->disc_state == DSC_DELETED)) {
+               set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
                return;
+       }
 
        if (ea->sp->gen2 != fcport->login_gen) {
                /* target side must have changed it. */
@@ -6712,8 +6725,10 @@ qla2x00_abort_isp_cleanup(scsi_qla_host_t *vha)
        }
 
        /* Clear all async request states across all VPs. */
-       list_for_each_entry(fcport, &vha->vp_fcports, list)
+       list_for_each_entry(fcport, &vha->vp_fcports, list) {
                fcport->flags &= ~(FCF_LOGIN_NEEDED | FCF_ASYNC_SENT);
+               fcport->scan_state = 0;
+       }
        spin_lock_irqsave(&ha->vport_slock, flags);
        list_for_each_entry(vp, &ha->vp_list, list) {
                atomic_inc(&vp->vref_count);
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index d416ac5d1e4c..d34f6ba36a03 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -5086,6 +5086,7 @@ void qla24xx_create_new_sess(struct scsi_qla_host *vha, 
struct qla_work_evt *e)
        if (fcport) {
                fcport->id_changed = 1;
                fcport->scan_state = QLA_FCPORT_FOUND;
+               fcport->chip_reset = vha->hw->base_qpair->chip_reset;
                memcpy(fcport->node_name, e->u.new_sess.node_name, WWN_SIZE);
 
                if (pla) {
diff --git a/drivers/scsi/qla2xxx/qla_target.c 
b/drivers/scsi/qla2xxx/qla_target.c
index d733e405c625..d0061ae1488e 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1209,7 +1209,6 @@ static void qla24xx_chk_fcp_state(struct fc_port *sess)
                sess->logout_on_delete = 0;
                sess->logo_ack_needed = 0;
                sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
-               sess->scan_state = 0;
        }
 }
 
-- 
2.12.0