USB: iMX21: accept very late isochronous URBs

[karo-tx-linux.git] / drivers / usb / host / imx21-hcd.c

diff --git a/drivers/usb/host/imx21-hcd.c b/drivers/usb/host/imx21-hcd.c
index 60a5de505ca1845609fe34278405e752ddf73226..adb01d950a165f7cf7d5e1a54fe6b674b4cb533a 100644 (file)
--- a/drivers/usb/host/imx21-hcd.c
+++ b/drivers/usb/host/imx21-hcd.c
@@ -824,13 +824,13 @@ static int imx21_hc_urb_enqueue_isoc(struct usb_hcd *hcd,
                        i = DIV_ROUND_UP(wrap_frame(
                                        cur_frame - urb->start_frame),
                                        urb->interval);
-                       if (urb->transfer_flags & URB_ISO_ASAP) {
+
+                       /* Treat underruns as if URB_ISO_ASAP was set */
+                       if ((urb->transfer_flags & URB_ISO_ASAP) ||
+                                       i >= urb->number_of_packets) {
                                urb->start_frame = wrap_frame(urb->start_frame
                                                + i * urb->interval);
                                i = 0;
-                       } else if (i >= urb->number_of_packets) {
-                               ret = -EXDEV;
-                               goto alloc_dmem_failed;
                        }
                }
        }