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Commit 08a16208 authored by Denis Efremov's avatar Denis Efremov Committed by Nicholas Bellinger
Browse files

tcm_fc: rcu_deref outside rcu lock/unlock section 



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: default avatarDenis Efremov <yefremov.denis@gmail.com>
Acked-by: default avatarMark D. Rustad <mark.d.rustad@intel.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 6de7145c

drivers/target/tcm_fc/tfc_sess.c

+3 −1
Original line number Diff line number Diff line
@@ -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;