[PATCH for-5.8 v2] usb: dwc2: Add missing cleanups when usb_add_gadget_udc() fails

From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: hminas@synopsys.com, gregkh@linuxfoundation.org,
	linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, marex@denx.de,
	stable@vger.kernel.org,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH for-5.8 v2] usb: dwc2: Add missing cleanups when usb_add_gadget_udc() fails
Date: Sat,  4 Jul 2020 00:50:43 +0200	[thread overview]
Message-ID: <20200703225043.387769-1-martin.blumenstingl@googlemail.com> (raw)

Call dwc2_debugfs_exit() and dwc2_hcd_remove() (if the HCD was enabled
earlier) when usb_add_gadget_udc() has failed. This ensures that the
debugfs entries created by dwc2_debugfs_init() as well as the HCD are
cleaned up in the error path.

Fixes: 207324a321a866 ("usb: dwc2: Postponed gadget registration to the udc class driver")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
Changes since v1 at [0]
- also cleanup the HCD as suggested by Minas (thank you!)
- updated the subject accordingly


[0] https://patchwork.kernel.org/patch/11631381/


 drivers/usb/dwc2/platform.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index c347d93eae64..9febae441069 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -582,12 +582,16 @@ static int dwc2_driver_probe(struct platform_device *dev)
 		retval = usb_add_gadget_udc(hsotg->dev, &hsotg->gadget);
 		if (retval) {
 			dwc2_hsotg_remove(hsotg);
-			goto error_init;
+			goto error_debugfs;
 		}
 	}
 #endif /* CONFIG_USB_DWC2_PERIPHERAL || CONFIG_USB_DWC2_DUAL_ROLE */
 	return 0;
 
+error_debugfs:
+	dwc2_debugfs_exit(hsotg);
+	if (hsotg->hcd_enabled)
+		dwc2_hcd_remove(hsotg);
 error_init:
 	if (hsotg->params.activate_stm_id_vb_detection)
 		regulator_disable(hsotg->usb33d);
-- 
2.27.0

