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Fix Short Packet EHCI Transfers 

Signed-off-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

Fixes #10867.
This commit is contained in:
Akshay Jaggi 2014-06-22 08:35:37 +00:00 committed by Adrien Destugues
parent 6063c02ef9
commit b1c9a1a31d
1 changed files with 18 additions and 2 deletions
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20
src/add-ons/kernel/busses/usb/ehci.cpp
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@ -1613,6 +1613,22 @@ EHCI::FinishTransfers()
break;
}
if(((status>>EHCI_QTD_PID_SHIFT) & EHCI_QTD_PID_MASK) == EHCI_QTD_PID_IN
&& ((status>>EHCI_QTD_BYTES_SHIFT) & EHCI_QTD_BYTES_MASK) !=0) {
// a short packet condition existed on this descriptor
if(transfer->transfer->TransferPipe()->Type() & USB_OBJECT_CONTROL_PIPE) {
// for control pipes, the next descriptor
// executed is the Status descriptor
while(!(descriptor->next_phy & EHCI_ITEM_TERMINATE)) {
descriptor = descriptor->next_log;
}
continue;
}
// for bulk/interrupt pipes, no other descriptors are executed
transferDone = true;
break;
}
descriptor = descriptor->next_log;
}
@ -2093,7 +2109,7 @@ EHCI::FillQueueWithRequest(Transfer *transfer, ehci_qh *queueHead,
if (transfer->VectorCount() > 0) {
ehci_qtd *lastDescriptor = NULL;
status_t result = CreateDescriptorChain(pipe, &dataDescriptor,
&lastDescriptor, strayDescriptor, transfer->VectorLength(),
&lastDescriptor, statusDescriptor, transfer->VectorLength(),
directionIn ? EHCI_QTD_PID_IN : EHCI_QTD_PID_OUT);
if (result < B_OK) {
@ -2108,7 +2124,7 @@ EHCI::FillQueueWithRequest(Transfer *transfer, ehci_qh *queueHead,
}
LinkDescriptors(setupDescriptor, dataDescriptor, strayDescriptor);
LinkDescriptors(lastDescriptor, statusDescriptor, strayDescriptor);
LinkDescriptors(lastDescriptor, statusDescriptor, statusDescriptor);
} else {
// no data: link setup and status descriptors directly
LinkDescriptors(setupDescriptor, statusDescriptor, strayDescriptor);