3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mark Rustad <mark.d.rus...@intel.com>
commit 863555be0c81558b1af277addcf68acb8f778860 upstream.
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.rus...@intel.com>
Tested-by: Ross Brattain <ross.b.bratt...@intel.com>
Signed-off-by: Nicholas Bellinger <n...@linux-iscsi.org>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
drivers/target/tcm_fc/tfc_sess.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/target/tcm_fc/tfc_sess.c b/drivers/target/tcm_fc/tfc_sess.c
index cb99da9..87901fa 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;
--
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