qla2xxx: Remove racy, now-redundant check of sess_tearing_down

Now that target_submit_cmd() / target_get_sess_cmd() check
sess_tearing_down before adding commands to the list, we no longer
need the check in qlt_do_work().  In fact this check is racy anyway
(and that race is what inspired the change to add the check of
sess_tearing_down to the target core).

Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: Arun Easi <arun.easi@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 87b5a33..5b30132 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -2643,19 +2643,9 @@ static void qlt_do_work(struct work_struct *work)
        spin_lock_irqsave(&ha->hardware_lock, flags);
        sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
            atio->u.isp24.fcp_hdr.s_id);
-       if (sess) {
-               if (unlikely(sess->se_sess->sess_tearing_down)) {
-                       sess = NULL;
-                       spin_unlock_irqrestore(&ha->hardware_lock, flags);
-                       goto out_term;
-               } else {
-                       /*
-                        * Do the extra kref_get() before dropping
-                        * qla_hw_data->hardware_lock.
-                        */
-                       kref_get(&sess->se_sess->sess_kref);
-               }
-       }
+       /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
+       if (sess)
+               kref_get(&sess->se_sess->sess_kref);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
        if (unlikely(!sess)) {