dm: core: Correct the return value for uclass_find_first_device()
This function returns -ENODEV when there is no device. This is
inconsistent with other functions, such as uclass_find_next_device(),
which returns 0.
Update it and tidy up the incorrect '-1' values in the comments.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index af575bb..f217876 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -225,7 +225,7 @@
if (ret)
return ret;
if (list_empty(&uc->dev_head))
- return -ENODEV;
+ return 0;
*devp = list_first_entry(&uc->dev_head, struct udevice, uclass_node);