1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index d1498c03c4cb..56f6c584c651 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2061,6 +2061,16 @@ static int handle_tx_event(struct xhci_hcd *xhci,
                 if (!event_seg) {
                         if (!ep->skip ||
                             !usb_endpoint_xfer_isoc(&td->urb->ep->desc)) {
+                                /* Some host controllers give a spurious
+                                 * successful event after a short transfer.
+                                 * Ignore it.
+                                 */
+                                if ((xhci->quirks & XHCI_SPURIOUS_SUCCESS) && 
+                                                ep_ring->last_td_was_short) {
+                                        ep_ring->last_td_was_short = false;
+                                        ret = 0;
+                                        goto cleanup;
+                                }
                                 /* HC is busted, give up! */
                                 xhci_err(xhci,
                                         "ERROR Transfer event TRB DMA ptr not "
@@ -2071,6 +2081,10 @@ static int handle_tx_event(struct xhci_hcd *xhci,
                         ret = skip_isoc_td(xhci, td, event, ep, &status);
                         goto cleanup;
                 }
+                if (trb_comp_code == COMP_SHORT_TX)
+                        ep_ring->last_td_was_short = true;
+                else
+                        ep_ring->last_td_was_short = false;
 
                 if (ep->skip) {
                         xhci_dbg(xhci, "Found td. Clear skip flag.\n");