[PATCH v2] usb: gadget: udc: core: Warn about failed to find udc

From: Dejin Zheng
Date: Sat Jan 04 2020 - 08:27:56 EST

If we do not warn here, the user may not know failed to
find udc device by a gadget driver with the same name
because it silently fails. Let's print a warning in that
case so developers find these problems faster.

Signed-off-by: Dejin Zheng <zhengdejin5@xxxxxxxxx>

V2: fix some mistake in comments.

drivers/usb/gadget/udc/core.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 51fa614b4079..9b11046480fe 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1414,6 +1414,8 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver)

+ if (ret)
+ pr_warn("udc-core: couldn't find an available UDC or it's busy\n");
return ret;
ret = udc_bind_to_driver(udc, driver);