[PATCH 4.4 082/162] usb: gadget: configfs: Fix missing spin_lock_init()

[Greg Kroah-Hartman]

From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>

commit 093edc2baad2c258b1f55d1ab9c63c2b5ae67e42 upstream.

The driver allocates the spinlock but not initialize it.
Use spin_lock_init() on it to initialize it correctly.

This is detected by Coccinelle semantic patch.

Fixes: 1a1c851bbd70 ("usb: gadget: configfs: fix concurrent issue between composite APIs")
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Peter Chen <peter.chen@xxxxxxx>
Link: https://lore.kernel.org/r/20191030034046.188808-1-weiyongjun1@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/gadget/configfs.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -1542,6 +1542,7 @@ static struct config_group *gadgets_make
 	gi->composite.resume = NULL;
 	gi->composite.max_speed = USB_SPEED_SUPER;
 
+	spin_lock_init(&gi->spinlock);
 	mutex_init(&gi->lock);
 	INIT_LIST_HEAD(&gi->string_list);
 	INIT_LIST_HEAD(&gi->available_func);