usb: gadget: dummy_hcd: allow to free requests on disabled endpoints

ep->desc is set to NULL on endpoint disable. That means once an endpoint
is disabled it is not possible to free requests. In my target gadget I
first disable endpoints to make sure I have no requests on the fly and
then free frequests. On dummy I am leaking memory here.
Since I can't imagine a reason why it should be a bad thing, lets allow
to free requests on disabled endpoints. On removal of composite the ep0
request is removed so lets allow that here as well.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index a6dfd2164166..af063cbca4c4 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -595,14 +595,12 @@ static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
 
 static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
 {
-        struct dummy_ep         *ep;
         struct dummy_request    *req;
 
-        if (!_ep || !_req)
-                return;
-        ep = usb_ep_to_dummy_ep(_ep);
-        if (!ep->desc && _ep->name != ep0name)
+        if (!_ep || !_req) {
+                __WARN();
                 return;
+        }
 
         req = usb_request_to_dummy_request(_req);
         WARN_ON(!list_empty(&req->queue));