aboutsummaryrefslogtreecommitdiff
path: root/drivers/ntb/ntb_transport.c
diff options
context:
space:
mode:
authorJon Mason <jon.mason@intel.com>2013-01-22 11:35:40 -0700
committerJon Mason <jon.mason@intel.com>2013-05-15 10:57:17 -0700
commit186f27ff9f9ec5c110739ced88ce9f8fca053882 (patch)
tree4f4738bb432a30ae4a0d3e2ddf13251cf3095746 /drivers/ntb/ntb_transport.c
parentf722406faae2d073cc1d01063d1123c35425939e (diff)
downloadlinux-linaro-stable-186f27ff9f9ec5c110739ced88ce9f8fca053882.tar.gz
NTB: variable dereferenced before check
Correct instances of variable dereferencing before checking its value on the functions exported to the client drivers. Also, add sanity checks for all exported functions. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jon Mason <jon.mason@intel.com>
Diffstat (limited to 'drivers/ntb/ntb_transport.c')
-rw-r--r--drivers/ntb/ntb_transport.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index e0bdfd7f9930..74c58125acfc 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1210,12 +1210,14 @@ EXPORT_SYMBOL_GPL(ntb_transport_create_queue);
*/
void ntb_transport_free_queue(struct ntb_transport_qp *qp)
{
- struct pci_dev *pdev = ntb_query_pdev(qp->ndev);
+ struct pci_dev *pdev;
struct ntb_queue_entry *entry;
if (!qp)
return;
+ pdev = ntb_query_pdev(qp->ndev);
+
cancel_delayed_work_sync(&qp->link_work);
ntb_unregister_db_callback(qp->ndev, qp->qp_num);
@@ -1371,12 +1373,13 @@ EXPORT_SYMBOL_GPL(ntb_transport_link_up);
*/
void ntb_transport_link_down(struct ntb_transport_qp *qp)
{
- struct pci_dev *pdev = ntb_query_pdev(qp->ndev);
+ struct pci_dev *pdev;
int rc, val;
if (!qp)
return;
+ pdev = ntb_query_pdev(qp->ndev);
qp->client_ready = NTB_LINK_DOWN;
rc = ntb_read_local_spad(qp->ndev, QP_LINKS, &val);
@@ -1408,6 +1411,9 @@ EXPORT_SYMBOL_GPL(ntb_transport_link_down);
*/
bool ntb_transport_link_query(struct ntb_transport_qp *qp)
{
+ if (!qp)
+ return false;
+
return qp->qp_link == NTB_LINK_UP;
}
EXPORT_SYMBOL_GPL(ntb_transport_link_query);
@@ -1422,6 +1428,9 @@ EXPORT_SYMBOL_GPL(ntb_transport_link_query);
*/
unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp)
{
+ if (!qp)
+ return 0;
+
return qp->qp_num;
}
EXPORT_SYMBOL_GPL(ntb_transport_qp_num);
@@ -1436,6 +1445,9 @@ EXPORT_SYMBOL_GPL(ntb_transport_qp_num);
*/
unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp)
{
+ if (!qp)
+ return 0;
+
return qp->tx_max_frame - sizeof(struct ntb_payload_header);
}
EXPORT_SYMBOL_GPL(ntb_transport_max_size);