net: thunder: fix a potential NULL pointer dereference

In case alloc_ordered_workqueue fails, the fix reports the error
and returns -ENOMEM.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 503cfad..aa2be48 100644 (file)
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -2234,6 +2234,12 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        nic->nicvf_rx_mode_wq = alloc_ordered_workqueue("nicvf_rx_mode_wq_VF%d",
                                                        WQ_MEM_RECLAIM,
                                                        nic->vf_id);
+       if (!nic->nicvf_rx_mode_wq) {
+               err = -ENOMEM;
+               dev_err(dev, "Failed to allocate work queue\n");
+               goto err_unregister_interrupts;
+       }
+
        INIT_WORK(&nic->rx_mode_work.work, nicvf_set_rx_mode_task);
        spin_lock_init(&nic->rx_mode_wq_lock);
        mutex_init(&nic->rx_mode_mtx);