[v4,1/5] PCI: split up pci_read_bridge_bases()

Commit Message

Bjorn Helgaas Feb. 17, 2010, 8:19 p.m. UTC

None

Patch

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index d300943..4b47b4b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -281,26 +281,12 @@  static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
 	}
 }
 
-void __devinit pci_read_bridge_bases(struct pci_bus *child)
+static void __devinit pci_read_bridge_io(struct pci_bus *child)
 {
 	struct pci_dev *dev = child->self;
 	u8 io_base_lo, io_limit_lo;
-	u16 mem_base_lo, mem_limit_lo;
 	unsigned long base, limit;
 	struct resource *res;
-	int i;
-
-	if (pci_is_root_bus(child))	/* It's a host bus, nothing to read */
-		return;
-
-	dev_info(&dev->dev, "PCI bridge to [bus %02x-%02x]%s\n",
-		 child->secondary, child->subordinate,
-		 dev->transparent ? " (subtractive decode)": "");
-
-	if (dev->transparent) {
-		for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
-			child->resource[i] = child->parent->resource[i - 3];
-	}
 
 	res = child->resource[0];
 	pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
@@ -328,6 +314,14 @@  void __devinit pci_read_bridge_bases(struct pci_bus *child)
 			 "  bridge window [io  %04lx - %04lx] reg reading\n",
 				 base, limit);
 	}
+}
+
+static void __devinit pci_read_bridge_mmio(struct pci_bus *child)
+{
+	struct pci_dev *dev = child->self;
+	u16 mem_base_lo, mem_limit_lo;
+	unsigned long base, limit;
+	struct resource *res;
 
 	res = child->resource[1];
 	pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo);
@@ -344,6 +338,14 @@  void __devinit pci_read_bridge_bases(struct pci_bus *child)
 			"  bridge window [mem 0x%08lx - 0x%08lx] reg reading\n",
 					 base, limit + 0xfffff);
 	}
+}
+
+static void __devinit pci_read_bridge_mmio_pref(struct pci_bus *child)
+{
+	struct pci_dev *dev = child->self;
+	u16 mem_base_lo, mem_limit_lo;
+	unsigned long base, limit;
+	struct resource *res;
 
 	res = child->resource[2];
 	pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
@@ -389,6 +391,28 @@  void __devinit pci_read_bridge_bases(struct pci_bus *child)
 	}
 }
 
+void __devinit pci_read_bridge_bases(struct pci_bus *child)
+{
+	struct pci_dev *dev = child->self;
+	int i;
+
+	if (pci_is_root_bus(child))	/* It's a host bus, nothing to read */
+		return;
+
+	dev_info(&dev->dev, "PCI bridge to [bus %02x-%02x]%s\n",
+		 child->secondary, child->subordinate,
+		 dev->transparent ? " (subtractive decode)" : "");
+
+	if (dev->transparent) {
+		for (i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
+			child->resource[i] = child->parent->resource[i - 3];
+	}
+
+	pci_read_bridge_io(child);
+	pci_read_bridge_mmio(child);
+	pci_read_bridge_mmio_pref(child);
+}
+
 static struct pci_bus * pci_alloc_bus(void)
 {
 	struct pci_bus *b;