diff options
| -rw-r--r-- | drivers/net/cnic.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/cnic.c b/drivers/net/cnic.c index 40865aac2afa..45584442a35c 100644 --- a/drivers/net/cnic.c +++ b/drivers/net/cnic.c @@ -327,6 +327,12 @@ static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type, if (l5_cid >= MAX_CM_SK_TBL_SZ) break; + rcu_read_lock(); + if (!rcu_dereference(cp->ulp_ops[CNIC_ULP_L4])) { + rc = -ENODEV; + rcu_read_unlock(); + break; + } csk = &cp->csk_tbl[l5_cid]; csk_hold(csk); if (cnic_in_use(csk)) { @@ -341,6 +347,7 @@ static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type, cnic_cm_set_pg(csk); } csk_put(csk); + rcu_read_unlock(); rc = 0; } } |