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libfc: Clarify fc_exch_find()

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The condition ep != NULL && ep->xid != xid can never be met. Make
this explicit.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
This commit is contained in:
Bart Van Assche 2013-08-17 20:20:07 +00:00 committed by Robert Love
parent a84ea8c7e8
commit 8d08023687
1 changed files with 3 additions and 1 deletions
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4
drivers/scsi/libfc/fc_exch.c
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@ -836,8 +836,10 @@ static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid)
pool = per_cpu_ptr(mp->pool, xid & fc_cpu_mask);
spin_lock_bh(&pool->lock);
ep = fc_exch_ptr_get(pool, (xid - mp->min_xid) >> fc_cpu_order);
if (ep && ep->xid == xid)
if (ep) {
WARN_ON(ep->xid != xid);
fc_exch_hold(ep);
}
spin_unlock_bh(&pool->lock);
}
return ep;