linux-kernel - [PATCH v1 2/2] usb: gadget: udc: core: Print error code in usb_gadget_probe

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Message-Id: <20211004144126.49154-2-andriy.shevchenko@linux.intel.com>
Date:   Mon,  4 Oct 2021 17:41:26 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Felipe Balbi <balbi@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 2/2] usb: gadget: udc: core: Print error code in usb_gadget_probe_driver()

When the UDC is not found, print also the error code for easier debugging.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/usb/gadget/udc/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index f66ac6f8011e..d6265118647b 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1564,7 +1564,7 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
 
 	mutex_unlock(&udc_lock);
 	if (ret)
-		pr_warn("couldn't find an available UDC or it's busy\n");
+		pr_warn("couldn't find an available UDC or it's busy: %d\n", ret);
 	return ret;
 found:
 	ret = udc_bind_to_driver(udc, driver);
-- 
2.33.0