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: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarJon Mason <jon.mason@intel.com>
parent f722406f
......@@ -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);
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