usb: host: max3421-hcd: Fix potential NULL urb dereference

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Mosberger <davidm@egauge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/max3421-hcd.c b/drivers/usb/host/max3421-hcd.c
index dfc74d6..28abda1 100644 (file)
--- a/drivers/usb/host/max3421-hcd.c
+++ b/drivers/usb/host/max3421-hcd.c
@@ -588,12 +588,14 @@ max3421_next_transfer(struct usb_hcd *hcd, int fast_retransmit)
 {
        struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);
        struct urb *urb = max3421_hcd->curr_urb;
-       struct max3421_ep *max3421_ep = urb->ep->hcpriv;
+       struct max3421_ep *max3421_ep;
        int cmd = -EINVAL;
 
        if (!urb)
                return; /* nothing to do */
 
+       max3421_ep = urb->ep->hcpriv;
+
        switch (max3421_ep->pkt_state) {
        case PKT_STATE_SETUP:
                cmd = max3421_ctrl_setup(hcd, urb);