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scsi: qla2xxx: Fix stale session 

On fast cable pull, where driver is unable to detect device has disappeared
and came back based on switch info, qla2xxx would not re-login while remote
port has already invalidated the session.  This causes IO timeout.  This
patch would relogin to remote device for RSCN affected port.

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/20190830222402.23688-6-hmadhani@marvell.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2019-08-30 15:24:01 -07:00 committed by Martin K. Petersen
parent ce0ba496dc
commit 2037ce49d3
1 changed files with 3 additions and 2 deletions
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5
drivers/scsi/qla2xxx/qla_gs.c
View File

@ -3628,7 +3628,6 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp)
list_for_each_entry(fcport, &vha->vp_fcports, list) {
if (memcmp(rp->port_name, fcport->port_name, WWN_SIZE))
continue;
fcport->scan_needed = 0;
fcport->scan_state = QLA_FCPORT_FOUND;
found = true;
/*
@ -3637,10 +3636,12 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp)
if ((fcport->flags & FCF_FABRIC_DEVICE) == 0) {
qla2x00_clear_loop_id(fcport);
fcport->flags |= FCF_FABRIC_DEVICE;
} else if (fcport->d_id.b24 != rp->id.b24) {
} else if (fcport->d_id.b24 != rp->id.b24 ||
fcport->scan_needed) {
qlt_schedule_sess_for_deletion(fcport);
}
fcport->d_id.b24 = rp->id.b24;
fcport->scan_needed = 0;
break;
}