* [PATCH v2] usb: gadget: udc: core: Warn about failed to find udc
@ 2020-01-04 13:27 Dejin Zheng
0 siblings, 0 replies; only message in thread
From: Dejin Zheng @ 2020-01-04 13:27 UTC (permalink / raw)
To: balbi, gregkh, stern, rogerq; +Cc: linux-usb, linux-kernel, Dejin Zheng
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@gmail.com>
---
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)
}
mutex_unlock(&udc_lock);
+ if (ret)
+ pr_warn("udc-core: couldn't find an available UDC or it's busy\n");
return ret;
found:
ret = udc_bind_to_driver(udc, driver);
--
2.17.1
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2020-01-04 13:27 [PATCH v2] usb: gadget: udc: core: Warn about failed to find udc Dejin Zheng
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