linux-kernel - [RFC for-5.8] usb: dwc2: Cleanup debugfs when usb_add_gadget

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Message-Id: <20200629180314.2878638-1-martin.blumenstingl@googlemail.com>
Date:   Mon, 29 Jun 2020 20:03:14 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     hminas@...opsys.com, gregkh@...uxfoundation.org,
        linux-usb@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, marex@...x.de,
        stable@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [RFC for-5.8] usb: dwc2: Cleanup debugfs when usb_add_gadget_udc() fails

Call dwc2_debugfs_exit() when usb_add_gadget_udc() has failed. This
ensure that the debugfs entries created by dwc2_debugfs_init() 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@...glemail.com>
---
This patch is compile-tested only. I found this while trying to
understand the latest changes to dwc2/platform.c.


 drivers/usb/dwc2/platform.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index c347d93eae64..02b6da7e21d7 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -582,12 +582,14 @@ 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);
 error_init:
 	if (hsotg->params.activate_stm_id_vb_detection)
 		regulator_disable(hsotg->usb33d);
-- 
2.27.0