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tcm_fc: rcu_deref outside rcu lock/unlock section

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Use rcu_dereference_protected in order to prevent lockdep
complaint. Sequel of the patch 863555be

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Denis Efremov <yefremov.denis@gmail.com>
Acked-by: Mark D. Rustad <mark.d.rustad@intel.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Denis Efremov 2012-08-18 16:10:31 +04:00 committed by Nicholas Bellinger
parent 6de7145ca3
commit 08a16208c8
1 changed files with 3 additions and 1 deletions
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4
drivers/target/tcm_fc/tfc_sess.c
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@ -456,7 +456,9 @@ static void ft_prlo(struct fc_rport_priv *rdata)
struct ft_tport *tport;
mutex_lock(&ft_lport_lock);
tport = rcu_dereference(rdata->local_port->prov[FC_TYPE_FCP]);
tport = rcu_dereference_protected(rdata->local_port->prov[FC_TYPE_FCP],
lockdep_is_held(&ft_lport_lock));
if (!tport) {
mutex_unlock(&ft_lport_lock);
return;