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Correctly clear an endpoint on cancel. Adjusted some comments/output.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25543 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz 2008-05-18 13:07:54 +00:00
parent 0439bcbbbb
commit 87fe2972ec
1 changed files with 9 additions and 10 deletions
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19
src/add-ons/kernel/busses/usb/ohci.cpp
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@ -425,10 +425,10 @@ OHCI::CancelQueuedTransfers(Pipe *pipe, bool force)
}
// Clear the endpoint
current->endpoint->head_logical_descriptor = NULL;
current->endpoint->head_physical_descriptor = 0;
current->endpoint->tail_logical_descriptor = NULL;
current->endpoint->tail_physical_descriptor = 0;
current->endpoint->head_logical_descriptor
= current->endpoint->tail_logical_descriptor;
current->endpoint->head_physical_descriptor
= current->endpoint->tail_physical_descriptor;
if (!force) {
// If the transfer is canceled by force, the one causing the
@ -728,7 +728,7 @@ OHCI::_Interrupt()
}
if (status & OHCI_WRITEBACK_DONE_HEAD) {
TRACE(("usb_ohci: transfer descriptor processed\n"));
TRACE(("usb_ohci: transfer descriptors processed\n"));
// Acknowledge it in the finisher thread, not here.
result = B_INVOKE_SCHEDULER;
finishTransfers = true;
@ -869,10 +869,9 @@ OHCI::_FinishTransfers()
acquire_sem_etc(fFinishTransfersSem, semCount, B_RELATIVE_TIMEOUT, 0);
uint32 doneList = fHcca->done_head & ~OHCI_DONE_INTERRUPTS;
// If done_head is zero, there are not processed descriptors
// If done_head is zero, there are no processed descriptors
// in the done list and we have been woken up by CancelQueuedTransfers
// or CancelQueuedIsochronousTransfers in order to do some clean up
// and back to sleep.
// or CancelQueuedIsochronousTransfers in order to do some clean up.
if (doneList) {
// Pull out the done list and reverse its order
// for both general and isochronous descriptors
@ -905,7 +904,7 @@ OHCI::_FinishTransfers()
// TODO: Move the acknowledgement in the interrupt handler.
// The done_head value can be passed through a shared variable.
fHcca->done_head = 0;
_WriteReg(OHCI_INTERRUPT_ENABLE, OHCI_WRITEBACK_DONE_HEAD);
_WriteReg(OHCI_INTERRUPT_STATUS, OHCI_WRITEBACK_DONE_HEAD);
// Process isochronous list first
for (isoCurrent = isoTop; isoCurrent != NULL; isoCurrent
@ -1112,8 +1111,8 @@ OHCI::_SwitchEndpointTail(ohci_endpoint_descriptor *endpoint,
_LinkDescriptors(last, tail);
// update the endpoint tail pointer to reflect the change
endpoint->tail_physical_descriptor = (uint32)tail->physical_address;
endpoint->tail_logical_descriptor = tail;
endpoint->tail_physical_descriptor = (uint32)tail->physical_address;
}