scsi: qla2xxx: allow session delete to finish before create.

This patch flushes del_work and free_work while sending NACK response for
PRLI

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_target.c

@@ -684,6 +684,9 @@ void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 
  switch (e->u.nack.type) {
  case SRB_NACK_PRLI:
+ t = e->u.nack.fcport;
+ flush_work(&t->del_work);
+ flush_work(&t->free_work);
  mutex_lock(&vha->vha_tgt.tgt_mutex);
  t = qlt_create_sess(vha, e->u.nack.fcport, 0);
  mutex_unlock(&vha->vha_tgt.tgt_mutex);