PCI: cpqphp: Fix possible null pointer dereference

There is otherwise a risk of a null pointer dereference.

Found by cppcheck, a static code analysis program.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c
index 11845b796799..f593585f2784 100644
--- a/drivers/pci/hotplug/cpqphp_ctrl.c
+++ b/drivers/pci/hotplug/cpqphp_ctrl.c
@@ -709,7 +709,8 @@ static struct pci_resource *get_max_resource(struct pci_resource **head, u32 siz
                                 temp = temp->next;
                         }
 
-                        temp->next = max->next;
+                        if (temp)
+                                temp->next = max->next;
                 }
 
                 max->next = NULL;