@@ -926,7 +926,7 @@ static int
net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct net2272_ep *ep;
- struct net2272_request *req;
+ struct net2272_request *req = NULL, *tmp;
unsigned long flags;
int stopped;
@@ -939,11 +939,13 @@ net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
ep->stopped = 1;
/* make sure it's still 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) {
ep->stopped = stopped;
spin_unlock_irqrestore(&ep->dev->lock, flags);
return -EINVAL;
@@ -954,7 +956,6 @@ net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name);
net2272_done(ep, req, -ECONNRESET);
}
- req = NULL;
ep->stopped = stopped;
spin_unlock_irqrestore(&ep->dev->lock, flags);
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/net2272.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)