xhci: Don't show incorrect WARN message about events for empty rings

[pandora-kernel.git] / drivers / usb / host / xhci-ring.c

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 74ed210..ba0122c 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2396,12 +2396,16 @@ static int handle_tx_event(struct xhci_hcd *xhci,
                 */
                if (list_empty(&ep_ring->td_list)) {
                        /*
-                        * A stopped endpoint may generate an extra completion
-                        * event if the device was suspended.  Don't print
-                        * warnings.
+                        * Don't print wanings if it's due to a stopped endpoint
+                        * generating an extra completion event if the device
+                        * was suspended. Or, a event for the last TRB of a
+                        * short TD we already got a short event for.
+                        * The short TD is already removed from the TD list.
                         */
+
                        if (!(trb_comp_code == COMP_STOP ||
-                                               trb_comp_code == COMP_STOP_INVAL)) {
+                             trb_comp_code == COMP_STOP_INVAL ||
+                             ep_ring->last_td_was_short)) {
                                xhci_warn(xhci, "WARN Event TRB for slot %d ep %d with no TDs queued?\n",
                                                TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
                                                ep_index);