of/device: Don't register disabled devices

Device nodes with the property status="disabled" are not usable and so
don't register them when parsing the device tree for devices.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Hollis Blanchard <hollis_blanchard@mentor.com>
Cc: Deepak Saxena <deepak_saxena@mentor.com>
Cc: Scott Wood <scottwood@freescale.com>,
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 14 insertions, 8 deletions

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 5b4a07f1220..c01cd1ac761 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -633,6 +633,9 @@ EXPORT_SYMBOL(of_device_alloc);
  * @np: pointer to node to create device for
  * @bus_id: name to assign device
  * @parent: Linux device model parent device.
+ *
+ * Returns pointer to created platform device, or NULL if a device was not
+ * registered.  Unavailable devices will not get registered.
  */
 struct platform_device *of_platform_device_create(struct device_node *np,
                                             const char *bus_id,
@@ -640,6 +643,9 @@ struct platform_device *of_platform_device_create(struct device_node *np,
 {
         struct platform_device *dev;
 
+        if (!of_device_is_available(np))
+                return NULL;
+
         dev = of_device_alloc(np, bus_id, parent);
         if (!dev)
                 return NULL;
@@ -683,8 +689,9 @@ static int of_platform_bus_create(const struct device_node *bus,
                 pr_debug("   create child: %s\n", child->full_name);
                 dev = of_platform_device_create(child, NULL, parent);
                 if (dev == NULL)
-                        rc = -ENOMEM;
-                else if (!of_match_node(matches, child))
+                        continue;
+
+                if (!of_match_node(matches, child))
                         continue;
                 if (rc == 0) {
                         pr_debug("   and sub busses\n");
@@ -733,10 +740,9 @@ int of_platform_bus_probe(struct device_node *root,
         if (of_match_node(matches, root)) {
                 pr_debug(" root match, create all sub devices\n");
                 dev = of_platform_device_create(root, NULL, parent);
-                if (dev == NULL) {
-                        rc = -ENOMEM;
+                if (dev == NULL)
                         goto bail;
-                }
+
                 pr_debug(" create all sub busses\n");
                 rc = of_platform_bus_create(root, matches, &dev->dev);
                 goto bail;
@@ -748,9 +754,9 @@ int of_platform_bus_probe(struct device_node *root,
                 pr_debug("  match: %s\n", child->full_name);
                 dev = of_platform_device_create(child, NULL, parent);
                 if (dev == NULL)
-                        rc = -ENOMEM;
-                else
-                        rc = of_platform_bus_create(child, matches, &dev->dev);
+                        continue;
+
+                rc = of_platform_bus_create(child, matches, &dev->dev);
                 if (rc) {
                         of_node_put(child);
                         break;