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authorMark Rustad <mark.d.rustad@intel.com>2012-06-26 15:57:30 -0700
committerNicholas Bellinger <nab@linux-iscsi.org>2012-07-06 12:52:09 -0700
commit863555be0c81558b1af277addcf68acb8f778860 (patch)
tree5fd9df950b9397f1b265d20a53fbd9bec72ef4d9
parent5134de2815ac723ecfba4a1c7b2a90fa4d8dcfd9 (diff)
tcm_fc: Resolve suspicious RCU usage warnings
Use rcu_dereference_protected to tell rcu that the ft_lport_lock is held during ft_lport_create. This resolved "suspicious RCU usage" warnings when debugging options are turned on. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
-rw-r--r--drivers/target/tcm_fc/tfc_sess.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/target/tcm_fc/tfc_sess.c b/drivers/target/tcm_fc/tfc_sess.c
index cb99da920068..87901fa74dd7 100644
--- a/drivers/target/tcm_fc/tfc_sess.c
+++ b/drivers/target/tcm_fc/tfc_sess.c
@@ -58,7 +58,8 @@ static struct ft_tport *ft_tport_create(struct fc_lport *lport)
struct ft_tport *tport;
int i;
- tport = rcu_dereference(lport->prov[FC_TYPE_FCP]);
+ tport = rcu_dereference_protected(lport->prov[FC_TYPE_FCP],
+ lockdep_is_held(&ft_lport_lock));
if (tport && tport->tpg)
return tport;