diff options
Diffstat (limited to 'drivers/usb/host/fhci-sched.c')
| -rw-r--r-- | drivers/usb/host/fhci-sched.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/host/fhci-sched.c b/drivers/usb/host/fhci-sched.c index 8f18538e0ff..95ca5986e67 100644 --- a/drivers/usb/host/fhci-sched.c +++ b/drivers/usb/host/fhci-sched.c @@ -739,9 +739,13 @@ void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb) } /* for ISO transfer calculate start frame index */ - if (ed->mode == FHCI_TF_ISO && urb->transfer_flags & URB_ISO_ASAP) - urb->start_frame = ed->td_head ? ed->last_iso + 1 : + if (ed->mode == FHCI_TF_ISO) { + /* Ignore the possibility of underruns */ + urb->start_frame = ed->td_head ? ed->next_iso : get_frame_num(fhci); + ed->next_iso = (urb->start_frame + urb->interval * + urb->number_of_packets) & 0x07ff; + } /* * OHCI handles the DATA toggle itself,we just use the USB |