diff options
| -rw-r--r-- | drivers/pci/pcie/bwctrl.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/pcie/bwctrl.c b/drivers/pci/pcie/bwctrl.c index 58ba8142c9a3..d8d2aa85a229 100644 --- a/drivers/pci/pcie/bwctrl.c +++ b/drivers/pci/pcie/bwctrl.c @@ -294,6 +294,10 @@ static int pcie_bwnotif_probe(struct pcie_device *srv) struct pci_dev *port = srv->port; int ret; + /* Can happen if we run out of bus numbers during enumeration. */ + if (!port->subordinate) + return -ENODEV; + struct pcie_bwctrl_data *data = devm_kzalloc(&srv->device, sizeof(*data), GFP_KERNEL); if (!data) |