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EHCI: Disable the physical buffers logic, at least for now.

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It seems it may have caused serious regressions on some hardware,
see #19949 and #19945.
This commit is contained in:
Augustin Cavalier
2026-02-28 20:34:12 -05:00
parent 4d9bb0a399
commit 6a4a02907a
1 changed files with 2 additions and 0 deletions
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src/add-ons/kernel/busses/usb/ehci.cpp
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@@ -2506,6 +2506,7 @@ status_t
EHCI::FillQueueWithData(Transfer *transfer, ehci_qh *queueHead, EHCI::FillQueueWithData(Transfer *transfer, ehci_qh *queueHead,
ehci_qtd **_dataDescriptor, bool *_directionIn, bool prepareKernelAccess) ehci_qtd **_dataDescriptor, bool *_directionIn, bool prepareKernelAccess)
{ {
#if 0 /* works most of the time, but apparently broken on at least some hardware */
if (transfer->IsPhysical()) { if (transfer->IsPhysical()) {
// Try to use the physical buffer directly, first. // Try to use the physical buffer directly, first.
status_t result = _FillQueueWithPhysicalData(transfer, queueHead, status_t result = _FillQueueWithPhysicalData(transfer, queueHead,
@@ -2513,6 +2514,7 @@ EHCI::FillQueueWithData(Transfer *transfer, ehci_qh *queueHead,
if (result != B_NOT_SUPPORTED) if (result != B_NOT_SUPPORTED)
return result; return result;
} }
#endif
Pipe *pipe = transfer->TransferPipe(); Pipe *pipe = transfer->TransferPipe();
bool directionIn = (pipe->Direction() == Pipe::In); bool directionIn = (pipe->Direction() == Pipe::In);