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| author | Denis Efremov <yefremov.denis@gmail.com> | 2012-08-18 16:10:31 +0400 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-08-20 14:52:15 -0700 |
| commit | 08a16208c8cb2ce1f79fea24f21dd7a8df4f12b6 (patch) | |
| tree | 8df3946aff29d4dcbdbddb42296388a3486c1b6e /drivers/target/tcm_fc | |
| parent | 6de7145ca3db231a84b7516a6cb25878da6ebb19 (diff) | |
| download | linux-08a16208c8cb2ce1f79fea24f21dd7a8df4f12b6.tar.gz | |
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: 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>
Diffstat (limited to 'drivers/target/tcm_fc')
| -rw-r--r-- | drivers/target/tcm_fc/tfc_sess.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/target/tcm_fc/tfc_sess.c b/drivers/target/tcm_fc/tfc_sess.c index 87901fa74dd7..3c9e5b57caab 100644 --- a/drivers/target/tcm_fc/tfc_sess.c +++ b/drivers/target/tcm_fc/tfc_sess.c @@ -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; |