diff options
Diffstat (limited to 'drivers/usb/host/uhci-q.c')
| -rw-r--r-- | drivers/usb/host/uhci-q.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c index 15921fd5504..da6f56d996c 100644 --- a/drivers/usb/host/uhci-q.c +++ b/drivers/usb/host/uhci-q.c @@ -1200,7 +1200,7 @@ static int uhci_result_common(struct uhci_hcd *uhci, struct urb *urb) if (debug > 1 && errbuf) { /* Print the chain for debugging */ uhci_show_qh(uhci, urbp->qh, errbuf, - ERRBUF_LEN, 0); + ERRBUF_LEN - EXTRA_SPACE, 0); lprintk(errbuf); } } @@ -1287,7 +1287,7 @@ static int uhci_submit_isochronous(struct uhci_hcd *uhci, struct urb *urb, return -EINVAL; /* Can't change the period */ } else { - next = uhci->frame_number + 2; + next = uhci->frame_number + 1; /* Find the next unused frame */ if (list_empty(&qh->queue)) { @@ -1303,7 +1303,7 @@ static int uhci_submit_isochronous(struct uhci_hcd *uhci, struct urb *urb, } /* Fell behind? */ - if (uhci_frame_before_eq(frame, next)) { + if (!uhci_frame_before_eq(next, frame)) { /* USB_ISO_ASAP: Round up to the first available slot */ if (urb->transfer_flags & URB_ISO_ASAP) @@ -1311,13 +1311,17 @@ static int uhci_submit_isochronous(struct uhci_hcd *uhci, struct urb *urb, -qh->period; /* - * Not ASAP: Use the next slot in the stream. If - * the entire URB falls before the threshold, fail. + * Not ASAP: Use the next slot in the stream, + * no matter what. */ else if (!uhci_frame_before_eq(next, frame + (urb->number_of_packets - 1) * qh->period)) - return -EXDEV; + dev_dbg(uhci_dev(uhci), "iso underrun %p (%u+%u < %u)\n", + urb, frame, + (urb->number_of_packets - 1) * + qh->period, + next); } } |