Many of the exit cases were not releasing the rcu read lock.
Corrected the exit paths.
Signed-off-by: Dick Kennedy <dick.kenn...@broadcom.com>
Signed-off-by: James Smart <jsmart2...@gmail.com>
---
drivers/scsi/lpfc/lpfc_attr.c | 32 +++++++++++++++++++-------------
1 file changed, 19 insertions(+), 13 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 31b963ae7289..d4c65e2109e2 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -355,7 +355,7 @@ lpfc_nvme_info_show(struct device *dev, struct
device_attribute *attr,
phba->sli4_hba.io_xri_max,
lpfc_sli4_get_els_iocb_cnt(phba));
if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
/* Port state is only one of two values for now. */
if (localport->port_id)
@@ -371,7 +371,7 @@ lpfc_nvme_info_show(struct device *dev, struct
device_attribute *attr,
wwn_to_u64(vport->fc_nodename.u.wwn),
localport->port_id, statep);
if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
nrport = NULL;
@@ -398,39 +398,39 @@ lpfc_nvme_info_show(struct device *dev, struct
device_attribute *attr,
/* Tab in to show lport ownership. */
if (strlcat(buf, "NVME RPORT ", PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
if (phba->brd_no >= 10) {
if (strlcat(buf, " ", PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
}
scnprintf(tmp, sizeof(tmp), "WWPN x%llx ",
nrport->port_name);
if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
scnprintf(tmp, sizeof(tmp), "WWNN x%llx ",
nrport->node_name);
if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
scnprintf(tmp, sizeof(tmp), "DID x%06x ",
nrport->port_id);
if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
/* An NVME rport can have multiple roles. */
if (nrport->port_role & FC_PORT_ROLE_NVME_INITIATOR) {
if (strlcat(buf, "INITIATOR ", PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
}
if (nrport->port_role & FC_PORT_ROLE_NVME_TARGET) {
if (strlcat(buf, "TARGET ", PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
}
if (nrport->port_role & FC_PORT_ROLE_NVME_DISCOVERY) {
if (strlcat(buf, "DISCSRVC ", PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
}
if (nrport->port_role & ~(FC_PORT_ROLE_NVME_INITIATOR |
FC_PORT_ROLE_NVME_TARGET |
@@ -438,12 +438,12 @@ lpfc_nvme_info_show(struct device *dev, struct
device_attribute *attr,
scnprintf(tmp, sizeof(tmp), "UNKNOWN ROLE x%x",
nrport->port_role);
if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
}
scnprintf(tmp, sizeof(tmp), "%s\n", statep);
if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
- goto buffer_done;
+ goto rcu_unlock_buf_done;
}
rcu_read_unlock();
@@ -505,7 +505,13 @@ lpfc_nvme_info_show(struct device *dev, struct
device_attribute *attr,
atomic_read(&lport->cmpl_fcp_err));
strlcat(buf, tmp, PAGE_SIZE);
-buffer_done:
+ /* RCU is already unlocked. */
+ goto buffer_done;
+
+ rcu_unlock_buf_done:
+ rcu_read_unlock();
+
+ buffer_done:
len = strnlen(buf, PAGE_SIZE);
if (unlikely(len >= (PAGE_SIZE - 1))) {
--
2.13.7
