usb: gadget: at91_udc: move the dereference below the NULL test

The dereference should be moved below the NULL test.

spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index c9e66dfb02e6642c1e88149884857948b44869e8..d95f6b0793452b0446eabde345feebffad4af3e3 100644 (file)
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -469,7 +469,7 @@ static int at91_ep_enable(struct usb_ep *_ep,
                                const struct usb_endpoint_descriptor *desc)
 {
        struct at91_ep  *ep = container_of(_ep, struct at91_ep, ep);
-       struct at91_udc *udc = ep->udc;
+       struct at91_udc *udc;
        u16             maxpacket;
        u32             tmp;
        unsigned long   flags;
@@ -484,6 +484,7 @@ static int at91_ep_enable(struct usb_ep *_ep,
                return -EINVAL;
        }
 
+       udc = ep->udc;
        if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) {
                DBG("bogus device state\n");
                return -ESHUTDOWN;