USB: xhci: drop spinlock in xhci_urb_enqueue() error path.

Make sure the error path in xhci_urb_enqueue() releases the spinlock
before it returns.  Reported by Oliver in
	http://marc.info/?l=linux-usb&m=124091637311832&w=2

Reported-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
index 57aed12b63d2..c6b921994b28 100644
--- a/drivers/usb/host/xhci-hcd.c
+++ b/drivers/usb/host/xhci-hcd.c
@@ -591,7 +591,8 @@ int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
         if (!xhci->devs || !xhci->devs[slot_id]) {
                 if (!in_interrupt())
                         dev_warn(&urb->dev->dev, "WARN: urb submitted for dev with no Slot ID\n");
-                return -EINVAL;
+                ret = -EINVAL;
+                goto exit;
         }
         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
                 if (!in_interrupt())