From: a17671 <a17671@motorola.com>
Date: Mon, 18 Nov 2019 07:56:16 +0000 (+0800)
Subject: usb:Restore linked_func list in none-secure mode
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9c250a22757e697cc984106f98dcf401a1854717;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

usb:Restore linked_func list in none-secure mode

In none-secure mode, there is still
A low chance of gadget NULL case,
Restore the binded functions list back to
Linked_func list, so next time unbind functions
Could be handled correctly without memory corruption
This is a Samsung platform only issue

Change-Id: Ie46fc52d3eaa6ef60c1a4f6bb83a56229Montana854d
Signed-off-by: a17671 <a17671@motorola.com>
Reviewed-on: https://gerrit.mot.com/1456923
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
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 3d2e8fca5145..4ad3a08beb7b 100755
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -1779,6 +1779,14 @@ static ssize_t enable_store(struct device *pdev, struct device_attribute *attr,
 	if (!dev->secure) {
 		if (!gadget) {
 			pr_info("%s: Gadget is NULL: %p\n", __func__, gadget);
+			list_for_each_entry(c, &cdev->configs, list) {
+			cfg = container_of(c, struct config_usb_cfg, c);
+			list_for_each_entry_safe(f, tmp, &cfg->func_list, list) {
+				list_move_tail(&f->list, &dev->linked_func);
+			}
+			c->next_interface_id = 0;
+			memset(c->interface, 0, sizeof(c->interface));
+			}
 			mutex_unlock(&dev->lock);
 			return -ENODEV;
 		}