s390x/pci: fix null pointer bug

We should make sure that it's not NULL firstly.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 47ca853..9c1c04e 100644 (file)
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -712,7 +712,7 @@ static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev,
         pci_dev = PCI_DEVICE(dev);
 
         for (i = 0 ; i < PCI_SLOT_MAX; i++) {
-            if (s->pbdev[i]->pdev == pci_dev) {
+            if (s->pbdev[i] && s->pbdev[i]->pdev == pci_dev) {
                 pbdev = s->pbdev[i];
                 break;
             }