x86/PCI: Factor out pcibios_allocate_dev_resources()

Factor pcibios_allocate_dev_resources() out of
pcibios_allocate_resources().  Currently we only allocate these
resources at boot-time with a for_each_pci_dev() loop.  Eventually
we'll use pcibios_allocate_dev_resources() for hot-added devices, too.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

arch/x86/pci/i386.c

@@ -232,9 +232,8 @@ struct pci_check_idx_range {
 	int end;
 };
 
-static void __init pcibios_allocate_resources(int pass)
+static void __init pcibios_allocate_dev_resources(struct pci_dev *dev, int pass)
 {
-	struct pci_dev *dev = NULL;
 	int idx, disabled, i;
 	u16 command;
 	struct resource *r;
@@ -246,7 +245,6 @@ static void __init pcibios_allocate_resources(int pass)
 #endif
 	};
 
-	for_each_pci_dev(dev) {
 	pci_read_config_word(dev, PCI_COMMAND, &command);
 	for (i = 0; i < ARRAY_SIZE(idx_range); i++)
 		for (idx = idx_range[i].start; idx <= idx_range[i].end; idx++) {
@@ -280,13 +278,19 @@ static void __init pcibios_allocate_resources(int pass)
 			u32 reg;
 			dev_dbg(&dev->dev, "disabling ROM %pR\n", r);
 			r->flags &= ~IORESOURCE_ROM_ENABLE;
-				pci_read_config_dword(dev,
-						dev->rom_base_reg, &reg);
+			pci_read_config_dword(dev, dev->rom_base_reg, &reg);
 			pci_write_config_dword(dev, dev->rom_base_reg,
 						reg & ~PCI_ROM_ADDRESS_ENABLE);
 		}
 	}
-	}
+}
+
+static void __init pcibios_allocate_resources(int pass)
+{
+	struct pci_dev *dev = NULL;
+
+	for_each_pci_dev(dev)
+		pcibios_allocate_dev_resources(dev, pass);
 }
 
 static int __init pcibios_assign_resources(void)