1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 1c365b82781..922cd26b25e 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -3545,6 +3545,13 @@ static int __devinit pci_probe(struct pci_dev *dev,
 
         INIT_WORK(&ohci->bus_reset_work, bus_reset_work);
 
+        if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM) ||
+            pci_resource_len(dev, 0) < OHCI1394_REGISTER_SIZE) {
+                dev_err(&dev->dev, "invalid MMIO resource\n");
+                err = -ENXIO;
+                goto fail_disable;
+        }
+
         err = pci_request_region(dev, 0, ohci_driver_name);
         if (err) {
                 dev_err(&dev->dev, "MMIO resource unavailable\n");