usb: xhci: stop everything on the first call to xhci_stop

xhci_stop will be called twice, once for the shared hcd
and again for the primary hcd.

We stop the XHCI controller in any case so clean up
everything on the first call else we can timeout
waiting for pending requests to complete.

Cc: <stable@vger.kernel.org>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci.c

@@ -655,15 +655,6 @@ int xhci_run(struct usb_hcd *hcd)
 }
 EXPORT_SYMBOL_GPL(xhci_run);
 
-static void xhci_only_stop_hcd(struct usb_hcd *hcd)
-{
- struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-
- spin_lock_irq(&xhci->lock);
- xhci_halt(xhci);
- spin_unlock_irq(&xhci->lock);
-}
-
 /*
  * Stop xHCI driver.
  *
@@ -678,15 +669,14 @@ void xhci_stop(struct usb_hcd *hcd)
  u32 temp;
  struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 
- mutex_lock(&xhci->mutex);
-
- if (!usb_hcd_is_primary_hcd(hcd)) {
- xhci_only_stop_hcd(xhci->shared_hcd);
- mutex_unlock(&xhci->mutex);
+ if (xhci->xhc_state & XHCI_STATE_HALTED)
  return;
- }
 
+ mutex_lock(&xhci->mutex);
  spin_lock_irq(&xhci->lock);
+ xhci->xhc_state |= XHCI_STATE_HALTED;
+ xhci->cmd_ring_state = CMD_RING_STATE_STOPPED;
+
  /* Make sure the xHC is halted for a USB3 roothub
  * (xhci_stop() could be called as part of failed init).
  */