From: Jakob Koschel Date: Tue, 8 Mar 2022 17:18:04 +0000 (+0100) Subject: usb: gadget: udc: net2280: remove usage of list iterator past the loop body X-Git-Tag: v6.6.17~7891^2~34 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b6f8cc55133a60a8de0cf30f8d581ca3adc810b3;p=platform%2Fkernel%2Flinux-rpi.git usb: gadget: udc: net2280: remove usage of list iterator past the loop body 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 Link: https://lore.kernel.org/r/20220308171818.384491-13-jakobkoschel@gmail.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c index 16e7d2d..051d024 100644 --- a/drivers/usb/gadget/udc/net2280.c +++ b/drivers/usb/gadget/udc/net2280.c @@ -1240,7 +1240,8 @@ static void nuke(struct net2280_ep *ep) static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) { struct net2280_ep *ep; - struct net2280_request *req; + struct net2280_request *req = NULL; + struct net2280_request *iter; unsigned long flags; u32 dmactl; int stopped; @@ -1266,11 +1267,13 @@ static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) } /* make sure it's still queued on this endpoint */ - list_for_each_entry(req, &ep->queue, queue) { - if (&req->req == _req) - break; + list_for_each_entry(iter, &ep->queue, queue) { + if (&iter->req != _req) + continue; + req = iter; + break; } - if (&req->req != _req) { + if (!req) { ep->stopped = stopped; spin_unlock_irqrestore(&ep->dev->lock, flags); ep_dbg(ep->dev, "%s: Request mismatch\n", __func__);