[PATCH v4 2/5] usb: dwc3-generic: Return early when there is no child node

[Jonas Karlman]

The current error check for device_find_first_child is not working as
expected, the documentation for device_find_first_child mention:

  @devp: Returns first child device, or NULL if none
  Return: 0

Change to return early when there is no child node to avoid any possible
null pointer dereference.

Signed-off-by: Jonas Karlman <jo...@kwiboo.se>
Reviewed-by: Marek Vasut <ma...@denx.de>
Reviewed-by: Kever Yang <kever.y...@rock-chips.com>
---
v4:
- Collect r-b tag
v3:
- Collect r-b tag
v2:
- Update commit message

 drivers/usb/dwc3/dwc3-generic.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index 35e4b36a695e..4d5d500aefab 100644
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -558,9 +558,9 @@ int dwc3_glue_probe(struct udevice *dev)
                        return ret;
        }
 
-       ret = device_find_first_child(dev, &child);
-       if (ret)
-               return ret;
+       device_find_first_child(dev, &child);
+       if (!child)
+               return 0;
 
        if (glue->clks.count == 0) {
                ret = dwc3_glue_clk_init(child, glue);
-- 
2.41.0