diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h
index 98c31e5..0acee98 100644
--- a/arch/mips/include/asm/pci.h
+++ b/arch/mips/include/asm/pci.h
@@ -43,6 +43,9 @@ struct pci_controller {
 	   and XFree86. Eventually will be removed. */
 	unsigned int need_domain_info;
 
+	/* called in pcibios_enable_resources */
+	int (*pre_enable)(struct pci_controller *, struct pci_dev *, int);
+
 	int iommu;
 
 	/* Optional access methods for reading/writing the bus number
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index b8a0bf5..57031e2 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -261,14 +261,19 @@ static int pcibios_enable_resources(struct pci_dev *dev, int mask)
 	u16 cmd, old_cmd;
 	int idx;
 	struct resource *r;
+	struct pci_controller *hose = (struct pci_controller *)dev->sysdata;
 
 	pci_read_config_word(dev, PCI_COMMAND, &cmd);
 	old_cmd = cmd;
-	for (idx=0; idx < PCI_NUM_RESOURCES; idx++) {
+	for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
 		/* Only set up the requested stuff */
-		if (!(mask & (1<<idx)))
+		if (!(mask & (1 << idx)))
 			continue;
 
+		if (hose->pre_enable)
+			if (hose->pre_enable(hose, dev, idx) < 0)
+				return -EINVAL;
+
 		r = &dev->resource[idx];
 		if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
 			continue;
@@ -291,6 +296,7 @@ static int pcibios_enable_resources(struct pci_dev *dev, int mask)
 		       pci_name(dev), old_cmd, cmd);
 		pci_write_config_word(dev, PCI_COMMAND, cmd);
 	}
+
 	return 0;
 }