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Subject[PATCH 5.3 154/180] scsi: qla2xxx: Fix stuck login session
Date
From: Quinn Tran <qutran@marvell.com>

[ Upstream commit ce0ba496dccfc15d3a8866b845864585b5d316ff ]

Login session was stucked on cable pull. When FW is in the middle PRLI
PENDING + driver is in Initiator mode, driver fails to check back with FW to
see if the PRLI has completed. This patch would re-check with FW again to
make sure PRLI would complete before pushing forward with relogin.

Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Link: https://lore.kernel.org/r/20190830222402.23688-5-hmadhani@marvell.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/qla2xxx/qla_init.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index fb9095179fc59..d4e381f81997b 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -842,6 +842,15 @@ static void qla24xx_handle_gnl_done_event(scsi_qla_host_t *vha,
fcport->fw_login_state = current_login_state;
fcport->d_id = id;
switch (current_login_state) {
+ case DSC_LS_PRLI_PEND:
+ /*
+ * In the middle of PRLI. Let it finish.
+ * Allow relogin code to recheck state again
+ * with GNL. Push disc_state back to DELETED
+ * so GNL can go out again
+ */
+ fcport->disc_state = DSC_DELETED;
+ break;
case DSC_LS_PRLI_COMP:
if ((e->prli_svc_param_word_3[0] & BIT_4) == 0)
fcport->port_type = FCT_INITIATOR;
@@ -1517,7 +1526,7 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
u64 wwn;
u16 sec;

- ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x20d8,
+ ql_dbg(ql_dbg_disc, vha, 0x20d8,
"%s %8phC DS %d LS %d P %d fl %x confl %p rscn %d|%d login %d lid %d scan %d\n",
__func__, fcport->port_name, fcport->disc_state,
fcport->fw_login_state, fcport->login_pause, fcport->flags,
@@ -1528,6 +1537,7 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
return 0;

if ((fcport->loop_id != FC_NO_LOOP_ID) &&
+ qla_dual_mode_enabled(vha) &&
((fcport->fw_login_state == DSC_LS_PLOGI_PEND) ||
(fcport->fw_login_state == DSC_LS_PRLI_PEND)))
return 0;
@@ -1697,17 +1707,6 @@ void qla24xx_handle_relogin_event(scsi_qla_host_t *vha,
fcport->last_login_gen, fcport->login_gen,
fcport->flags);

- if ((fcport->fw_login_state == DSC_LS_PLOGI_PEND) ||
- (fcport->fw_login_state == DSC_LS_PRLI_PEND))
- return;
-
- if (fcport->fw_login_state == DSC_LS_PLOGI_COMP) {
- if (time_before_eq(jiffies, fcport->plogi_nack_done_deadline)) {
- set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
- return;
- }
- }
-
if (fcport->last_rscn_gen != fcport->rscn_gen) {
ql_dbg(ql_dbg_disc, vha, 0x20e9, "%s %d %8phC post gnl\n",
__func__, __LINE__, fcport->port_name);
--
2.20.1


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