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Subject[PATCH 5.4 313/388] scsi: qla2xxx: Retry PLOGI on FC-NVMe PRLI failure
Date
From: Quinn Tran <qutran@marvell.com>

[ Upstream commit 983f127603fac650fa34ee69db363e4615eaf9e7 ]

Current code will send PRLI with FC-NVMe bit set for the targets which
support only FCP. This may result into issue with targets which do not
understand NVMe and will go into a strange state. This patch would restart
the login process by going back to PLOGI state. The PLOGI state will force
the target to respond to correct PRLI request.

Fixes: c76ae845ea836 ("scsi: qla2xxx: Add error handling for PLOGI ELS passthrough")
Cc: stable@vger.kernel.org # 5.4
Link: https://lore.kernel.org/r/20191105150657.8092-2-hmadhani@marvell.com
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <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 | 28 ++++------------------------
drivers/scsi/qla2xxx/qla_iocb.c | 6 +++++-
2 files changed, 9 insertions(+), 25 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 2f2e059f4575e..62d2ee825c97a 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1911,33 +1911,13 @@ qla24xx_handle_prli_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
"%s %d %8phC post fc4 prli\n",
__func__, __LINE__, ea->fcport->port_name);
ea->fcport->fc4f_nvme = 0;
- qla24xx_post_prli_work(vha, ea->fcport);
return;
}

- /* at this point both PRLI NVME & PRLI FCP failed */
- if (N2N_TOPO(vha->hw)) {
- if (ea->fcport->n2n_link_reset_cnt < 3) {
- ea->fcport->n2n_link_reset_cnt++;
- /*
- * remote port is not sending Plogi. Reset
- * link to kick start his state machine
- */
- set_bit(N2N_LINK_RESET, &vha->dpc_flags);
- } else {
- ql_log(ql_log_warn, vha, 0x2119,
- "%s %d %8phC Unable to reconnect\n",
- __func__, __LINE__, ea->fcport->port_name);
- }
- } else {
- /*
- * switch connect. login failed. Take connection
- * down and allow relogin to retrigger
- */
- ea->fcport->flags &= ~FCF_ASYNC_SENT;
- ea->fcport->keep_nport_handle = 0;
- qlt_schedule_sess_for_deletion(ea->fcport);
- }
+ ea->fcport->flags &= ~FCF_ASYNC_SENT;
+ ea->fcport->keep_nport_handle = 0;
+ ea->fcport->logout_on_delete = 1;
+ qlt_schedule_sess_for_deletion(ea->fcport);
break;
}
}
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index 2e272fc858ed1..aed4ce66e6cf9 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -2773,6 +2773,7 @@ static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
ea.sp = sp;
qla24xx_handle_plogi_done_event(vha, &ea);
break;
+
case CS_IOCB_ERROR:
switch (fw_status[1]) {
case LSC_SCODE_PORTID_USED:
@@ -2843,6 +2844,7 @@ static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
fw_status[0], fw_status[1], fw_status[2]);

fcport->flags &= ~FCF_ASYNC_SENT;
+ fcport->disc_state = DSC_LOGIN_FAILED;
set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
break;
}
@@ -2855,6 +2857,7 @@ static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
fw_status[0], fw_status[1], fw_status[2]);

sp->fcport->flags &= ~FCF_ASYNC_SENT;
+ sp->fcport->disc_state = DSC_LOGIN_FAILED;
set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
break;
}
@@ -2890,11 +2893,12 @@ qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
return -ENOMEM;
}

+ fcport->flags |= FCF_ASYNC_SENT;
+ fcport->disc_state = DSC_LOGIN_PEND;
elsio = &sp->u.iocb_cmd;
ql_dbg(ql_dbg_io, vha, 0x3073,
"Enter: PLOGI portid=%06x\n", fcport->d_id.b24);

- fcport->flags |= FCF_ASYNC_SENT;
sp->type = SRB_ELS_DCMD;
sp->name = "ELS_DCMD";
sp->fcport = fcport;
--
2.25.1


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