scsi: qla2xxx: Remove session creation redundant code

Current code creates a session when a new port is
discovered, and a PLOGI/PRLI is received. There is
no need to create session when command has arrived.

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

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 7547472..a4783eb 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -2018,15 +2018,10 @@ static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
                ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
                    "qla_target(%d): task abort for non-existant session\n",
                    vha->vp_idx);
-               rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
-                   QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
-
                spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 
-               if (rc != 0) {
-                       qlt_24xx_send_abts_resp(ha->base_qpair, abts,
-                           FCP_TMF_REJECTED, false);
-               }
+               qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
+                           false);
                return;
        }
        spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
@@ -4246,87 +4241,6 @@ static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
        return cmd;
 }
 
-static void qlt_create_sess_from_atio(struct work_struct *work)
-{
-       struct qla_tgt_sess_op *op = container_of(work,
-                                       struct qla_tgt_sess_op, work);
-       scsi_qla_host_t *vha = op->vha;
-       struct qla_hw_data *ha = vha->hw;
-       struct fc_port *sess;
-       struct qla_tgt_cmd *cmd;
-       unsigned long flags;
-       uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
-
-       spin_lock_irqsave(&vha->cmd_list_lock, flags);
-       list_del(&op->cmd_list);
-       spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
-
-       if (op->aborted) {
-               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
-                   "sess_op with tag %u is aborted\n",
-                   op->atio.u.isp24.exchange_addr);
-               goto out_term;
-       }
-
-       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
-           "qla_target(%d): Unable to find wwn login"
-           " (s_id %x:%x:%x), trying to create it manually\n",
-           vha->vp_idx, s_id[0], s_id[1], s_id[2]);
-
-       if (op->atio.u.raw.entry_count > 1) {
-               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
-                   "Dropping multy entry atio %p\n", &op->atio);
-               goto out_busy;
-       }
-
-       sess = qlt_make_local_sess(vha, s_id);
-       /* sess has an extra creation ref. */
-
-       if (!sess)
-               goto out_busy;
-       /*
-        * Now obtain a pre-allocated session tag using the original op->atio
-        * packet header, and dispatch into __qlt_do_work() using the existing
-        * process context.
-        */
-       cmd = qlt_get_tag(vha, sess, &op->atio);
-       if (!cmd) {
-               struct qla_qpair *qpair = ha->base_qpair;
-
-               spin_lock_irqsave(qpair->qp_lock_ptr, flags);
-               qlt_send_busy(qpair, &op->atio, tc_sam_status);
-               spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
-
-               spin_lock_irqsave(&ha->tgt.sess_lock, flags);
-               ha->tgt.tgt_ops->put_sess(sess);
-               spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
-               kfree(op);
-               return;
-       }
-
-       /*
-        * __qlt_do_work() will call qlt_put_sess() to release
-        * the extra reference taken above by qlt_make_local_sess()
-        */
-       __qlt_do_work(cmd);
-       kfree(op);
-       return;
-out_term:
-       qlt_send_term_exchange(vha->hw->base_qpair, NULL, &op->atio, 0, 0);
-       kfree(op);
-       return;
-out_busy:
-       {
-               struct qla_qpair *qpair = ha->base_qpair;
-
-               spin_lock_irqsave(qpair->qp_lock_ptr, flags);
-               qlt_send_busy(qpair, &op->atio, qla_sam_status);
-               spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
-               kfree(op);
-       }
-       return;
-}
-
 /* ha->hardware_lock supposed to be held on entry */
 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
        struct atio_from_isp *atio)
@@ -4351,23 +4265,8 @@ static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
                return -EBUSY;
 
        sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
-       if (unlikely(!sess)) {
-               struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
-                                                    GFP_ATOMIC);
-               if (!op)
-                       return -ENOMEM;
-
-               memcpy(&op->atio, atio, sizeof(*atio));
-               op->vha = vha;
-
-               spin_lock_irqsave(&vha->cmd_list_lock, flags);
-               list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
-               spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
-
-               INIT_WORK(&op->work, qlt_create_sess_from_atio);
-               queue_work(qla_tgt_wq, &op->work);
-               return 0;
-       }
+       if (unlikely(!sess))
+               return -EFAULT;
 
        /* Another WWN used to have our s_id. Our PLOGI scheduled its
         * session deletion, but it's still in sess_del_work wq */
@@ -4477,14 +4376,11 @@ static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
 {
        struct atio_from_isp *a = (struct atio_from_isp *)iocb;
        struct qla_hw_data *ha = vha->hw;
-       struct qla_tgt *tgt;
        struct fc_port *sess;
        u64 unpacked_lun;
        int fn;
        unsigned long flags;
 
-       tgt = vha->vha_tgt.qla_tgt;
-
        fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
 
        spin_lock_irqsave(&ha->tgt.sess_lock, flags);
@@ -4495,15 +4391,7 @@ static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
        unpacked_lun =
            scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
 
-       if (!sess) {
-               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
-                   "qla_target(%d): task mgmt fn 0x%x for "
-                   "non-existant session\n", vha->vp_idx, fn);
-               return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
-                   sizeof(struct atio_from_isp));
-       }
-
-       if (sess->deleted)
+       if (sess == NULL || sess->deleted)
                return -EFAULT;
 
        return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);