1 files changed, 29 insertions, 7 deletions

diff --git a/arch/powerpc/kernel/eeh_cache.c b/arch/powerpc/kernel/eeh_cache.c
index 201943d54a6e..9c68f0837385 100644
--- a/arch/powerpc/kernel/eeh_cache.c
+++ b/arch/powerpc/kernel/eeh_cache.c
@@ -26,6 +26,7 @@
 #include <linux/spinlock.h>
 #include <linux/atomic.h>
 #include <asm/pci-bridge.h>
+#include <asm/debugfs.h>
 #include <asm/ppc-pci.h>
 
 
@@ -113,7 +114,7 @@ static void eeh_addr_cache_print(struct pci_io_addr_cache *cache)
 	while (n) {
 		struct pci_io_addr_range *piar;
 		piar = rb_entry(n, struct pci_io_addr_range, rb_node);
-		pr_debug("PCI: %s addr range %d [%pap-%pap]: %s\n",
+		pr_info("PCI: %s addr range %d [%pap-%pap]: %s\n",
 		       (piar->flags & IORESOURCE_IO) ? "i/o" : "mem", cnt,
 		       &piar->addr_lo, &piar->addr_hi, pci_name(piar->pcidev));
 		cnt++;
@@ -157,10 +158,8 @@ eeh_addr_cache_insert(struct pci_dev *dev, resource_size_t alo,
 	piar->pcidev = dev;
 	piar->flags = flags;
 
-#ifdef DEBUG
 	pr_debug("PIAR: insert range=[%pap:%pap] dev=%s\n",
 		 &alo, &ahi, pci_name(dev));
-#endif
 
 	rb_link_node(&piar->rb_node, parent, p);
 	rb_insert_color(&piar->rb_node, &pci_io_addr_cache_root.rb_root);
@@ -240,6 +239,8 @@ restart:
 		piar = rb_entry(n, struct pci_io_addr_range, rb_node);
 
 		if (piar->pcidev == dev) {
+			pr_debug("PIAR: remove range=[%pap:%pap] dev=%s\n",
+				 &piar->addr_lo, &piar->addr_hi, pci_name(dev));
 			rb_erase(n, &pci_io_addr_cache_root.rb_root);
 			kfree(piar);
 			goto restart;
@@ -298,9 +299,30 @@ void eeh_addr_cache_build(void)
 		eeh_addr_cache_insert_dev(dev);
 		eeh_sysfs_add_device(dev);
 	}
+}
 
-#ifdef DEBUG
-	/* Verify tree built up above, echo back the list of addrs. */
-	eeh_addr_cache_print(&pci_io_addr_cache_root);
-#endif
+static int eeh_addr_cache_show(struct seq_file *s, void *v)
+{
+	struct pci_io_addr_range *piar;
+	struct rb_node *n;
+
+	spin_lock(&pci_io_addr_cache_root.piar_lock);
+	for (n = rb_first(&pci_io_addr_cache_root.rb_root); n; n = rb_next(n)) {
+		piar = rb_entry(n, struct pci_io_addr_range, rb_node);
+
+		seq_printf(s, "%s addr range [%pap-%pap]: %s\n",
+		       (piar->flags & IORESOURCE_IO) ? "i/o" : "mem",
+		       &piar->addr_lo, &piar->addr_hi, pci_name(piar->pcidev));
+	}
+	spin_unlock(&pci_io_addr_cache_root.piar_lock);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(eeh_addr_cache);
+
+void eeh_cache_debugfs_init(void)
+{
+	debugfs_create_file_unsafe("eeh_address_cache", 0400,
+			powerpc_debugfs_root, NULL,
+			&eeh_addr_cache_fops);
 }