1 files changed, 47 insertions, 1 deletions

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index aac379e1c883..ff5e6bc2299d 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1072,7 +1072,12 @@ static int handle_tx_event(struct xhci_hcd *xhci,
                                 else
                                         status = 0;
                         } else {
-                                xhci_dbg(xhci, "Successful bulk transfer!\n");
+                                if (usb_endpoint_xfer_bulk(&td->urb->ep->desc))
+                                        xhci_dbg(xhci, "Successful bulk "
+                                                        "transfer!\n");
+                                else
+                                        xhci_dbg(xhci, "Successful interrupt "
+                                                        "transfer!\n");
                                 status = 0;
                         }
                         break;
@@ -1464,6 +1469,47 @@ static void giveback_first_trb(struct xhci_hcd *xhci, int slot_id,
         ring_ep_doorbell(xhci, slot_id, ep_index);
 }
 
+/*
+ * xHCI uses normal TRBs for both bulk and interrupt.  When the interrupt
+ * endpoint is to be serviced, the xHC will consume (at most) one TD.  A TD
+ * (comprised of sg list entries) can take several service intervals to
+ * transmit.
+ */
+int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
+                struct urb *urb, int slot_id, unsigned int ep_index)
+{
+        struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci,
+                        xhci->devs[slot_id]->out_ctx, ep_index);
+        int xhci_interval;
+        int ep_interval;
+
+        xhci_interval = EP_INTERVAL_TO_UFRAMES(ep_ctx->ep_info);
+        ep_interval = urb->interval;
+        /* Convert to microframes */
+        if (urb->dev->speed == USB_SPEED_LOW ||
+                        urb->dev->speed == USB_SPEED_FULL)
+                ep_interval *= 8;
+        /* FIXME change this to a warning and a suggestion to use the new API
+         * to set the polling interval (once the API is added).
+         */
+        if (xhci_interval != ep_interval) {
+                if (!printk_ratelimit())
+                        dev_dbg(&urb->dev->dev, "Driver uses different interval"
+                                        " (%d microframe%s) than xHCI "
+                                        "(%d microframe%s)\n",
+                                        ep_interval,
+                                        ep_interval == 1 ? "" : "s",
+                                        xhci_interval,
+                                        xhci_interval == 1 ? "" : "s");
+                urb->interval = xhci_interval;
+                /* Convert back to frames for LS/FS devices */
+                if (urb->dev->speed == USB_SPEED_LOW ||
+                                urb->dev->speed == USB_SPEED_FULL)
+                        urb->interval /= 8;
+        }
+        return xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, slot_id, ep_index);
+}
+
 static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
                 struct urb *urb, int slot_id, unsigned int ep_index)
 {