diff options
| -rw-r--r-- | drivers/usb/host/fhci-sched.c | 8 | ||||
| -rw-r--r-- | drivers/usb/host/fhci.h | 2 |
2 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/host/fhci-sched.c b/drivers/usb/host/fhci-sched.c index 8f18538e0ff7..95ca5986e672 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 diff --git a/drivers/usb/host/fhci.h b/drivers/usb/host/fhci.h index 7cc1c32dc36c..154e6a007727 100644 --- a/drivers/usb/host/fhci.h +++ b/drivers/usb/host/fhci.h @@ -338,7 +338,7 @@ struct ed { /* read only parameters, should be cleared upon initialization */ u8 toggle_carry; /* toggle carry from the last TD submitted */ - u32 last_iso; /* time stamp of last queued ISO transfer */ + u16 next_iso; /* time stamp of next queued ISO transfer */ struct td *td_head; /* a pointer to the current TD handled */ }; |