of/flattree: Fix crash when device tree absent
This patch fixes the condition where device tree support is compiled
in, but no device tree was proved by firmware. It makes
of_platform_bus_probe() explicitly check for a NULL device tree
pointer.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 5be0080..c52a798 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -617,6 +617,8 @@
root = of_find_node_by_path("/");
else
of_node_get(root);
+ if (root == NULL)
+ return -EINVAL;
pr_debug("of_platform_bus_probe()\n");
pr_debug(" starting at: %s\n", root->full_name);