dm: uclass: Add uclass_next_device_err() to return a valid device

Similarly to uclass_first_device_err(), add uclass_next_device_err()
which returns an error if there are no next devices in that uclass.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index 6cfcde8918..d9c5719a87 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -562,6 +562,19 @@ int uclass_next_device(struct udevice **devp)
 	return uclass_get_device_tail(dev, ret, devp);
 }
 
+int uclass_next_device_err(struct udevice **devp)
+{
+	int ret;
+
+	ret = uclass_next_device(devp);
+	if (ret)
+		return ret;
+	else if (!*devp)
+		return -ENODEV;
+
+	return 0;
+}
+
 int uclass_first_device_check(enum uclass_id id, struct udevice **devp)
 {
 	int ret;