PCI: enhance physical slot debug information

Convert usages of pr_debug to dev_dbg and add physical slot name.

Note that we use dev_dbg on the struct pci_bus and still manually
print out the PCI slot number (instead of calling dev_dbg on a
pci_dev) because a struct pci_bus with empty physical slots will
not have any pci_devs.

Reviewed-by: Andrew Patterson <[e-mail]>
Signed-off-by: Alex Chiang <[e-mail]>
Signed-off-by: Jesse Barnes <[e-mail]>

drivers/pci/slot.c

···
 /*
  * drivers/pci/slot.c
  * Copyright (C) 2006 Matthew Wilcox <[e-mail]>
- * Copyright (C) 2006-2008 Hewlett-Packard Development Company, L.P.
- * 	Alex Chiang <[e-mail]>
+ * Copyright (C) 2006-2009 Hewlett-Packard Development Company, L.P.
+ *	Alex Chiang <[e-mail]>
  */
 
 #include <linux/kobject.h>
···
 	struct pci_dev *dev;
 	struct pci_slot *slot = to_pci_slot(kobj);
 
-	pr_debug("%s: releasing pci_slot on %x:%d\n", __func__,
-		 slot->bus->number, slot->number);
+	dev_dbg(&slot->bus->dev, "dev %02x, released physical slot %s\n",
+		slot->number, pci_slot_name(slot));
 
 	list_for_each_entry(dev, &slot->bus->devices, bus_list)
 		if (PCI_SLOT(dev->devfn) == slot->number)
···
 		if (PCI_SLOT(dev->devfn) == slot_nr)
 			dev->slot = slot;
 
-	/* Don't care if debug printk has a -1 for slot_nr */
-	pr_debug("%s: created pci_slot on %04x:%02x:%02x\n",
-		 __func__, pci_domain_nr(parent), parent->number, slot_nr);
+	dev_dbg(&parent->dev, "dev %02x, created physical slot %s\n",
+		slot_nr, pci_slot_name(slot));
 
 out:
 	kfree(slot_name);
···
  */
 void pci_destroy_slot(struct pci_slot *slot)
 {
-	pr_debug("%s: dec refcount to %d on %04x:%02x:%02x\n", __func__,
-		 atomic_read(&slot->kobj.kref.refcount) - 1,
-		 pci_domain_nr(slot->bus), slot->bus->number, slot->number);
+	dev_dbg(&slot->bus->dev, "dev %02x, dec refcount to %d\n",
+		slot->number, atomic_read(&slot->kobj.kref.refcount) - 1);
 
 	down_write(&pci_bus_sem);
 	kobject_put(&slot->kobj);