From: a17671 <a17671@motorola.com>
Date: Thu, 17 Oct 2019 09:49:51 +0000 (+0800)
Subject: usb:configfs:Set udc_name NULL if attach failed
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f5ffaed4cde9ad22a23abf34c16f396588f5e863;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

usb:configfs:Set udc_name NULL if attach failed

If the probing of UDC controller failed
udc_name shall be NULL to avoid double unregistration
and the panic
It could happen in some corner case

Change-Id: I2e6e4168a505b86d8f1b57db53be91acc608ee97
Signed-off-by: a17671 <a17671@motorola.com>
Reviewed-on: https://gerrit.mot.com/1438349
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com>
Submit-Approved: Jira Key
---

diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index cd7cdaa3cad0..8dd6ea47a6de 100755
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -1896,8 +1896,10 @@ static ssize_t secure_store(struct device *pdev, struct device_attribute *attr,
 			pr_err("Failed detaching UDC from gadget %d\n", ret);
 	} else {
 		ret = usb_gadget_probe_driver(&gi->composite.gadget_driver);
-		if (ret)
+		if (ret) {
+			gi->composite.gadget_driver.udc_name = NULL;
 			pr_err("Failed attaching UDC to gadget %d\n", ret);
+		}
 	}
 	mutex_unlock(&gi->lock);