if (!mmio_resource_enabled(pdev, 0))
                return;
 
-       base = ioremap_nocache(pci_resource_start(pdev, 0),
-                                    pci_resource_len(pdev, 0));
-       if (base == NULL) return;
+       base = pci_ioremap_bar(pdev, 0);
+       if (base == NULL)
+               return;
 
 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
 #ifndef __hppa__
        if (!mmio_resource_enabled(pdev, 0))
                return;
 
-       base = ioremap_nocache(pci_resource_start(pdev, 0),
-                               pci_resource_len(pdev, 0));
-       if (base == NULL) return;
+       base = pci_ioremap_bar(pdev, 0);
+       if (base == NULL)
+               return;
 
        cap_length = readb(base);
        op_reg_base = base + cap_length;