@@ -966,7 +966,8 @@ static void nuke(struct pxa25x_ep *ep, int status)
static int pxa25x_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct pxa25x_ep *ep;
- struct pxa25x_request *req;
+ struct pxa25x_request *req = NULL;
+ struct pxa25x_request *tmp;
unsigned long flags;
ep = container_of(_ep, struct pxa25x_ep, ep);
@@ -976,11 +977,13 @@ static int pxa25x_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
local_irq_save(flags);
/* make sure it's actually queued on this endpoint */
- list_for_each_entry (req, &ep->queue, queue) {
- if (&req->req == _req)
+ list_for_each_entry(tmp, &ep->queue, queue) {
+ if (&tmp->req == _req) {
+ req = tmp;
break;
+ }
}
- if (&req->req != _req) {
+ if (!req) {
local_irq_restore(flags);
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/pxa25x_udc.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)