commit 46766dffff08e7ed93db36b0a1f49b24aac4399f
author Simon Glass <sjg@chromium.org> Fri Jul 31 09:31:19 2015 -0600
committer Simon Glass <sjg@chromium.org> Wed Aug 05 08:42:40 2015 -0600
tree d179bd7e426095ec4377cc10ed682aca8fec8c9d
parent 68b27d36c0c51a74ac736253e67bc15ac3a442ec

dm: core: Check for empty list in uclass_find_device()

This function needs to check the list has entries before traversing it.
Fix this bug.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

drivers/core/uclass.c

diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index aba9880..ffe6995 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -153,6 +153,8 @@
 	ret = uclass_get(id, &uc);
 	if (ret)
 		return ret;
+	if (list_empty(&uc->dev_head))
+		return -ENODEV;
 
 	list_for_each_entry(dev, &uc->dev_head, uclass_node) {
 		if (!index--) {