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USB: EHCI: adjust error return code
The USB stack uses error code -ENOSPC to indicate that the periodic schedule is too full, with insufficient bandwidth to accommodate a new allocation. It uses -EFBIG to indicate that an isochronous transfer could not be linked into the schedule because it would exceed the number of isochronous packets the host controller driver can handle (generally because the new transfer would extend too far into the future). ehci-hcd uses the wrong error code at one point. This patch fixes it, along with a misleading comment and debugging message. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1604,11 +1604,11 @@ iso_stream_schedule (
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*/
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now2 = (now - base) & (mod - 1);
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/* Is the schedule already full? */
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/* Is the schedule about to wrap around? */
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if (unlikely(!empty && start < period)) {
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ehci_dbg(ehci, "iso sched full %p (%u-%u < %u mod %u)\n",
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ehci_dbg(ehci, "request %p would overflow (%u-%u < %u mod %u)\n",
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urb, stream->next_uframe, base, period, mod);
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status = -ENOSPC;
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status = -EFBIG;
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goto fail;
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}
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