1 files changed, 7 insertions, 3 deletions

diff --git a/arch/alpha/kernel/sys_miata.c b/arch/alpha/kernel/sys_miata.c
index b8b817feb1ee..910b43cd63e8 100644
--- a/arch/alpha/kernel/sys_miata.c
+++ b/arch/alpha/kernel/sys_miata.c
@@ -183,11 +183,15 @@ miata_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 
         if((slot == 7) && (PCI_FUNC(dev->devfn) == 3)) {
                 u8 irq=0;
-
-                if(pci_read_config_byte(pci_find_slot(dev->bus->number, dev->devfn & ~(7)), 0x40,&irq)!=PCIBIOS_SUCCESSFUL)
+                struct pci_dev *pdev = pci_get_slot(dev->bus, dev->devfn & ~7);
+                if(pdev == NULL || pci_read_config_byte(pdev, 0x40,&irq) != PCIBIOS_SUCCESSFUL) {
+                        pci_dev_put(pdev);
                         return -1;
-                else    
+                }
+                else    {
+                        pci_dev_put(pdev);
                         return irq;
+                }
         }
 
         return COMMON_TABLE_LOOKUP;