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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>
This commit is contained in:
Roland Dreier 2012-07-16 11:04:41 -07:00 committed by Nicholas Bellinger
parent bc187ea6c3
commit e1013f1437
1 changed files with 3 additions and 13 deletions
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16
drivers/scsi/qla2xxx/qla_target.c
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@ -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)) {