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usb: gadget: lpc32xxx_udc: Fix NULL dereference

Browse source 
udc is then checked for NULL, if NULL, it is then dereferenced as
udc->dev, it is found using Coccinelle.

We simplify the code to fix this problem, and we delete some conditions
at if {} which will never be met.

Reported-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Reported-by : Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Peter Chen 2015-03-11 10:07:47 +08:00 committed by Felipe Balbi
parent 72a472d2f9
commit 005a64307d
1 changed files with 3 additions and 12 deletions
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15
drivers/usb/gadget/udc/lpc32xx_udc.c
View file

@ -1803,23 +1803,14 @@ static int lpc32xx_ep_queue(struct usb_ep *_ep,
req = container_of(_req, struct lpc32xx_request, req);
ep = container_of(_ep, struct lpc32xx_ep, ep);
if (!_req || !_req->complete || !_req->buf ||
if (!_ep || !_req || !_req->complete || !_req->buf ||
!list_empty(&req->queue))
return -EINVAL;
udc = ep->udc;
if (!_ep) {
dev_dbg(udc->dev, "invalid ep\n");
return -EINVAL;
}
if ((!udc) || (!udc->driver) ||
(udc->gadget.speed == USB_SPEED_UNKNOWN)) {
dev_dbg(udc->dev, "invalid device\n");
return -EINVAL;
}
if (udc->gadget.speed == USB_SPEED_UNKNOWN)
return -EPIPE;
if (ep->lep) {
struct lpc32xx_usbd_dd_gad *dd;