diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2014-02-06 12:06:55 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2014-02-18 15:39:13 +0100 |
| commit | cc03ff9d0a147a399a11c9f513afa5e06ceee453 (patch) | |
| tree | d6910e049d5f29be6c150b8d44e4f5ff2c15a430 /hw/usb | |
| parent | 786ad214c72226fa5bd4ebf18aeb4c6b54d3ba80 (diff) | |
xhci iso: allow for some latency
Allow the scheduled transfer time be a bit behind, to
compensate for latencies. Without this xhci will wait
way to often for the mfindex wraparound, assuming the
scheduled time is in the future just because qemu is
a bit behind in processing the iso transfer requests.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/usb')
| -rw-r--r-- | hw/usb/hcd-xhci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index 706cdc732a..8261d00296 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -1977,7 +1977,7 @@ static void xhci_calc_iso_kick(XHCIState *xhci, XHCITransfer *xfer, xfer->mfindex_kick = ((xfer->trbs[0].control >> TRB_TR_FRAMEID_SHIFT) & TRB_TR_FRAMEID_MASK) << 3; xfer->mfindex_kick |= mfindex & ~0x3fff; - if (xfer->mfindex_kick < mfindex) { + if (xfer->mfindex_kick + 0x100 < mfindex) { xfer->mfindex_kick += 0x4000; } } |