usb: gadget: lpc32xxx_udc: Fix NULL dereference
Author: Peter Chen <peter.chen@freescale.com>
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
Reported-by : Julia Lawall
Signed-off-by: Peter Chen
Signed-off-by: Felipe Balbi
---
drivers/usb/gadget/udc/lpc32xx_udc.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index 27fd413..3b6a785 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -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; |
---
drivers/usb/gadget/udc/lpc32xx_udc.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index 27fd413..3b6a785 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -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;
