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authorBart Van Assche <bvanassche@acm.org>2013-08-17 20:20:07 +0000
committerRobert Love <robert.w.love@intel.com>2013-09-04 13:09:15 -0700
commit8d08023687e2515f2a48235aed80b6982025cd09 (patch)
tree8e593e299d722c027e7c5011c91667e438f27373 /drivers/scsi/libfc/fc_exch.c
parenta84ea8c7e839a73dab4bfc755f7f52e947690dab (diff)
downloadlinux-8d08023687e2515f2a48235aed80b6982025cd09.tar.bz2
libfc: Clarify fc_exch_find()
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>
Diffstat (limited to 'drivers/scsi/libfc/fc_exch.c')
-rw-r--r--drivers/scsi/libfc/fc_exch.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index d0be52ab62c8..f6bb0fbf422f 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -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;