@@ -1757,6 +1757,7 @@ static int bdc_gadget_ep_dequeue(struct usb_ep *_ep,
struct usb_request *_req)
{
struct bdc_req *req;
+ struct bdc_req *iter;
unsigned long flags;
struct bdc_ep *ep;
struct bdc *bdc;
@@ -1771,12 +1772,16 @@ static int bdc_gadget_ep_dequeue(struct usb_ep *_ep,
dev_dbg(bdc->dev, "%s ep:%s req:%p\n", __func__, ep->name, req);
bdc_dbg_bd_list(bdc, ep);
spin_lock_irqsave(&bdc->lock, flags);
+
+ req = NULL;
/* make sure it's still queued on this endpoint */
- list_for_each_entry(req, &ep->queue, queue) {
- if (&req->usb_req == _req)
- break;
+ list_for_each_entry(iter, &ep->queue, queue) {
+ if (&iter->usb_req != _req)
+ continue;
+ req = iter;
+ break;
}
- if (&req->usb_req != _req) {
+ if (!req) {
spin_unlock_irqrestore(&bdc->lock, flags);
dev_err(bdc->dev, "usb_req !=req n");
return -EINVAL;
If the list representing the request queue does not contain the expected request, the value of the list_for_each_entry() iterator will not point to a valid structure. To avoid type confusion in such case, the list iterator scope will be limited to the list_for_each_entry() loop. In preparation to limiting scope of the list iterator to the list traversal loop, use a dedicated pointer to point to the found request object [1]. Link: https://lore.kernel.org/all/YhdfEIwI4EdtHdym@kroah.com/ Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com> --- drivers/usb/gadget/udc/bdc/bdc_ep.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)